This file was created by the TYPO3 extension publications --- Timezone: CEST Creation date: 2026-04-30 Creation time: 15:55:37 --- Number of references 53 article Hirlinger-Alexander:25 We demonstrate a semiconductor microchip membrane external-cavity surface-emitting laser (MECSEL). This compact type of laser consists solely of a semiconductor gain region present as a micron-thin membrane, sandwiched between two transparent heat spreaders. The outer facets of the microchip MECSEL presented in this work have a highly reflective coating, which assembles the laser’s plane-parallel solid-state cavity with a total length of just ∼ 1 mm. One of the coatings has a slightly reduced reflectivity to act as an outcoupling mirror. The membrane microchip laser is optically pumped with a standard fiber-coupled diode laser module emitting at 808 nm and stabilizes itself due to the occurrance of a thermal lens. More than one watt of continuous wave output power around 1123 nm and a record value in slope efficiency of ∼ 51.4 % with MECSELs, while maintaining excellent beam quality (TEM00, M2 < 1.05), is demonstrated. Important properties of semiconductor lasers such as the efficiency, beam quality, and polarization were investigated. Further, the laser setup itself was used to characterize the thermal lens and its dependence on the absorbed pump power. Such systems represent an attractive solution, when high-power output at customizable emission wavelength with excellent beam quality is needed in combination with a very compact built size. 2025 12 10.1364/OE.574856 Opt. Express 33 Optica Publishing Group 53216—53230 25 Bragg reflectors; Diode lasers; High contrast gratings; Laser efficiency; Optical pumping; Semiconductor lasers Jakob Hirlinger-Alexander Michael Scharwaechter Franzisca Bader Julius Steck Matthias Seibold Marco Werner Roman Bek Hermann Kahle article 10.1063/5.0286998 Recent research revealed that single-mode vertical-cavity surface-emitting lasers under spin injection (spin-VCSELs) have the potential to revolutionize laser technology for short-haul optical communications. While previous studies have focused solely on single-mode operation, this study introduces multimode spin-VCSELs. We experimentally demonstrate the existence of multi-resonant polarization dynamics when spin is injected, a phenomenon previously unobserved. The development opens the door to significantly faster and more efficient optical communication systems by harnessing the collective behavior of multiple laser modes. Furthermore, we lay the groundwork for understanding multimode operation through the extension of the single-mode spin–flip model, which forms the basis for present and future analyses of multimode spin-laser operation. This work is an important step toward realizing the full potential of spin-VCSELs and, thus, enables significantly improved performance of spin-VCSEL-based optical networks in the future. 2025 10 2378-0967 10.1063/5.0286998 APL Photonics 10 106120 10 Uliana Diiankova Mariusz Drong Tobias Pusch Rainer Michalzik Markus Lindemann Nils C. Gerhardt Martin R. Hofmann article Jauch_2025 Negatively charged nitrogen-vacancy (NV) centers in diamonds are commonly used in quantum magnetometry. However, the potential of this approach is often limited by the inhomogeneity of the driving field. In this study, we explore the potential of closed-loop quantum optimal control to improve DC Ramsey magnetometry with NV-ensembles suffering from inhomogeneous microwave (MW) fields and MW power limitations. We demonstrate an improvement of the optically detected Ramsey contrast up to a factor of 3.13. This enables noticeable power savings for miniaturized devices without loss in magnetometry performance. Additionally, we show a recovery of 86.3% of the Ramsey contrast in presence of a five times less homogeneous MW field compared to the homogeneous field of a MW Helmholtz coil pair. 2025 9 10.1088/2058-9565/adffb2 Quantum Science and Technology 10 IOP Publishing 045028 4 Isabell Jauch Artur Skljarow Thomas Strohm Florian Dolde Tino Fuchs Fedor Jelezko article PhysRevX.15.021069 2025 5 10.1103/PhysRevX.15.021069 Phys. Rev. X 15: American Physical Society 021069 T. Joas F. Ferlemann R. Sailer P. J. Vetter J. Zhang R. S. Said T. Teraji S. Onoda T. Calarco G. Genov M. M. Müller F. Jelezko article Quarshie_2025 Nanoparticles and nanomaterials are revolutionizing medicine by offering diverse tools for diagnosis and therapy, including devices, contrast agents, drug delivery systems, adjuvants, therapeutics, and theragnostic agents. Realizing full applied potential requires a deep understanding of the interactions of nano dimensional objects with biological cells. In this study, we investigate interaction of single-crystal diamond nanoneedles (SCDNNs) containing silicon vacancy (SiV-) color centers with biological substances. Four batches of the diamond needles with sizes ranging between 200 nm and 1300 nm and their water suspensions were used in these studies. The human lung fibroblast cells were used for the proof-of-concept demonstration. Employing micro-photoluminescence (PL) mapping, confocal microscopy, and lactate dehydrogenase (LDH) viability tests, we evaluated the cellular response to the SCDNNs. Intriguingly, our investigation with PL spectroscopy revealed that the cells and SCDNNs can coexist together with approved efficient registration of SiV- centers presence. Notably, LDH release remained minimal in cells exposed to optimally sized SCDNNs, suggesting a small number of lysed cells, and indicating non-cytotoxicity in concentrations of 2–32 µg ml−1. The evidence obtained highlights the potential of SCDNNs for extra- or/and intracellular drug delivery when the surface of the needle is modified. In addition, fluorescent defects in the SCDNNs can be used for bioimaging as well as optical and quantum sensing. 2025 3 10.1088/1361-6528/adb8f4 Nanotechnology 36 IOP Publishing 165501 16 Mariam Quarshie Lena Golubewa Caterina Giraulo Silvana Morello Claudia Cirillo Maria Sarno Bo Xu Priyadharshini Balasubramanian Yuliya Mindarava Marijonas Tutkus Alexander Obraztsov Fedor Jelezko Polina Kuzhir Sergei Malykhin article PhysRevLett.134.120802 2025 3 10.1103/PhysRevLett.134.120802 Phys. Rev. Lett 134: American Physical Society 120802 Daniel Louzon Genko T. Genov Nicolas Staudenmaier Florian Frank Johannes Lang Matthew L. Markham Alex Retzker Fedor Jelezko article doi:10.1126/sciadv.adq6836 Nuclear hyperpolarization is a known method to enhance the signal in nuclear magnetic resonance (NMR) by orders of magnitude. The present work addresses the 13C hyperpolarization in diamond micro- and nanoparticles, using the optically pumped nitrogen-vacancy center (NV) to polarize 13C spins at room temperature. Consequences of the small particle size are mitigated by using a combination of surface treatment improving the 13C relaxation (T1) time, as well as that of NV, and applying a technique for NV illumination based on a microphotonic structure. Adjustments to the dynamical nuclear polarization sequence (PulsePol) are performed, as well as slow sample rotation, to improve the NV-13C polarization transfer rate. The hyperpolarized 13C NMR signal is observed in particles of 2-micrometer and 100-nanometer median sizes, with enhancements over the thermal signal (at 0.29-tesla magnetic field) of 1500 and 940, respectively. The present demonstration of room-temperature hyperpolarization anticipates the development of agents based on nanoparticles for sensitive magnetic resonance applications. Nuclear hyperpolarization of 13C spins is performed at ambient conditions in micro- and nanodiamonds. 2025 10.1126/sciadv.adq6836 Science Advances 11 eadq6836 9 Remi Blinder Yuliya Mindarava Martin Korzeczek Alastair Marshall Felix Glöckler Steffen Nothelfer Alwin Kienle Christian Laube Wolfgang Knolle Christian Jentgens Martin B. Plenio Fedor Jelezko article Klotz_arxiv 2025 arXiv 2508.05255 https://arxiv.org/abs/2508.05255 Marco Klotz Andreas Tangemann David Opferkuch Alexander Kubanek article PhysRevLett.134.043603 2025 1 10.1103/PhysRevLett.134.043603 Phys. Rev. Lett 134: American Physical Society 043603 Nick Grimm Katharina Senkalla Philipp J. Vetter Jurek Frey Prithvi Gundlapalli Tommaso Calarco Genko Genov Matthias M. Müller Fedor Jelezko article SHABGAHI2025112092 This study examines the influence of doping time on dopant density, microstructure, and electrochemical performance of oxygen-terminated boron-doped diamond (BDD) chips for flow injection amperometric (FIA) detection of adrenaline. Increasing doping time from 4 to 30 min slightly increased surface roughness (RMS ≈ 4–5.68 nm) while significantly enhancing boron incorporation ([B] ≈ 1 × 1019–6 × 1021 cm−3), improving electron transfer kinetics for the surface-insensitive [Ru(NH3)6]3+/2+ redox couple, as shown by cyclic voltammetry (CV). Excessive doping (60 min) reduced boron density ([B] ≈ 1??× 1020 cm−3), widened the potential window (2.24 V), and lowered double-layer capacitance (Cdl = 1.06 μF cm−2), while increased roughness (RMS ≈ 34 nm) introduced conductive pathways, maintaining charge transfer kinetics (ΔEp ≈ 100??mV for 30- and 60 min doping). However, [Fe(CN)6]3−/4− and adrenaline exhibited increased ΔEp (251 mV) and higher oxidation overpotential due to oxygen functional groups blocking active sites. Under FIA conditions, doping-induced microstructural changes improved analyte interaction and electron transfer, yielding better SNR (24.02 ± 2.47) and a competitive LOD (0.38 ±??0.003) compared to 30 min doping. Optimal performance was achieved at 15 min, balancing a smooth surface (RMS ≈ 4.50 nm) and optimized dopant density ([B] ≈ 6 × 1020 cm−3), achieving high sensitivity (0.9284 μA·cm−2/μM), a low LOD (0.28455 ± 0.003 μM), and a strong SNR (37.23 ± 1.86). 2025 0925-9635 https://doi.org/10.1016/j.diamond.2025.112092 Diamond and Related Materials 153: 112092 Boron-doped diamond, Adrenaline, Doping time, Microstructure, Flow injection analysis Ramtin Eghbal Shabgahi Alberto Pasquarelli Michael Wild Alexander Minkow Dietmar Kissinger article 10989537 2025 10.1109/LAWP.2025.3567324 IEEE Antennas and Wireless Propagation Letters 24 2517-2521 8 Tensors;Impedance;Geometry;Anisotropic;Shape;Metasurfaces;Anisotropic magnetoresistance;Modulation;Surface impedance;Databases;Anisotropic metasurface;holographic antenna;impedance tensor extraction;metasurface antenna Thomas Frey Aurel Baader Maximilian Döring Christian Waldschmidt Tobias Chaloun article doi:10.1021/acs.nanolett.5c02515 2025 10.1021/acs.nanolett.5c02515 Nano Letters 25 11626-11631 30 PMID: 40693560 Paul Fisher Alexander Zappacosta Jens Fuhrmann Benjamin Haylock Weibo Gao Roland Nagy Fedor Jelezko Robert Cernansky article 10878488 2025 10.1109/JMW.2025.3527900 IEEE Journal of Microwaves 5 257-268 2 Transmission line measurements;Permittivity;Lungs;Temperature measurement;Windows;Permittivity measurement;In vitro;Substrates;Media;Scattering parameters;Biological cells;biosensors;dielectric waveguide;lithography;microwave sensors;millimeter wave;physiology Philipp Hinz Adrian Diepolder Giorgio Fois Manfred Frick Christian Damm article SowAdvSc 2025 10.1002/advs.202511670 Advanced Science e11670 Mabur Sow Jacky Mohnani Genko Genov Raphael Klevesath Elisabeth Mayerhoefer Yuliya Mindarava Remi Blinder Soumen Mandal Fabien Clivaz Raul B. Gonzalez Daniel Tews Christian Laube Wolfgang Knolle Amelie Jerlitschka Farid Mahfoud Oleg Rezinkin Mateja Prslja Yingke Wu Pamela Fischer-Posovszky Martin B. Plenio Susana F. Huelga Tanja Weil Anke Krueger Gavin W. Morley Oliver A. Williams Steffen Stenger Fedor Jelezko article s25082454 Flow injection analysis (FIA) is widely used in drug screening, neurotransmitter detection, and water analysis. In this study, we investigated the electrochemical sensing performance of glassy graphene electrodes derived from pyrolyzed positive photoresist films (PPFs) via rapid thermal annealing (RTA) on SiO2/Si and polycrystalline diamond (PCD). Glassy graphene films fabricated at 800, 900, and 950 °C were characterized using Raman spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM) to assess their structural and morphological properties. Electrochemical characterization in phosphate-buffered saline (PBS, pH 7.4) revealed that annealing temperature and substrate type influence the potential window and double-layer capacitance. The voltammetric response of glassy graphene electrodes was further evaluated using the surface-insensitive [Ru(NH3)6]3+/2+ redox marker, the surface-sensitive [Fe(CN)6]3−/4− redox couple, and adrenaline, demonstrating that electron transfer efficiency is governed by annealing temperature and substrate-induced microstructural changes. FIA with amperometric detection showed a linear electrochemical response to adrenaline in the 3–300 µM range, achieving a low detection limit of 1.05 µM and a high sensitivity of 1.02 µA cm−2/µM. These findings highlight the potential of glassy graphene as a cost-effective alternative for advanced electrochemical sensors, particularly in biomolecule detection and analytical applications. 2025 10.3390/s25082454 Sensors 25 2454 8 Ramtin Eghbal Shabgahi Alexander Minkow Michael Wild Dietmar Kissinger Alberto Pasquarelli article FuhrmannAdvFuncMat 2025 10.1002/adfm.202501661 Advanced Functional Materials 2501661 Jens Fuhrmann Christoph Findler Michael Olney-Fraser Lev Kazak Fedor Jelezko article BaoAdvFuncMat2025 2025 10.1002/adfm.202520907 Advanced Functional Materials e20907 Yahua Bao Michal Gulka Kumar Parkarsh Jakub Copak Priyadharshini Balasubramanian Yuliya Mindarava Remi Blinder Michael Olney-Fraser Haotian Wen Hana Spanielova Helen Zhi Jie Zeng Benjamin Whitefield Igor Aharonovich Jaroslav Hruby Fedor Jelezko J Daniel Belnap Shery L Y Chang Petr Cigler article vetter2025roomtemperaturequantumsimulationatomically 2025 arXiv 2510.27374 https://arxiv.org/abs/2510.27374 Philipp J. Vetter Christoph Findler Antonio Verdú Matthias Kost Remi Blinder Jens Fuhrmann Christian Osterkamp Johannes Lang Martin B. Plenio Javier Prior Fedor Jelezko article Klotznpj 2025 10.1038/s41534-025-01049-2 npj Quantum Information 11: 91 Marco Klotz Andreas Tangemann Alexander Kubanek inproceedings 10.1117/12.3042377 2025 10.1117/12.3042377 International Society for Optics and Photonics Vertical External Cavity Surface Emitting Lasers (VECSELs) XIV 13346 SPIE Marcel Rattunde 133460G Membrane external-cavity surface-emitting lasers, MECSEL, Microchip semiconductor laser, Thermal lens, Thremal resistance Jakob Hirlinger-Alexander Michael Scharwaechter Franzisca Bader Julius Steck Matthias Seibold Marco Werner Roman Bek Hermann Kahle inproceedings 10999616 2025 10.23919/EuCAP63536.2025.10999616 2025 19th European Conference on Antennas and Propagation (EuCAP) 1-5 Antenna measurements;Tensors;MIMO radar;Gain measurement;Radar antennas;Leaky wave antennas;Frequency measurement;Impedance;Gain;Antenna radiation patterns;Holographic antenna;metasurface antenna;multi-feed antenna;multiple-input multiple-output (MIMO);impedance tensor;surface wave;leaky wave;glass technology Thomas Frey Jens Österle Maximilian Döring Christian Waldschmidt Tobias Chaloun inproceedings Diiankova:25 Vertical-cavity surface-emitting lasers (VCSELs) operate in a single longitudinal mode and typically support multiple transverse modes \[1\]. Our previous investigations focused only on VCSELs operating in a single mode \[2, 3\]. Here, we extend these studies by exploring the dynamics and characteristics of higher-order modes under spin injection. 2025 Conference on Lasers and Electro-Optics/Europe (CLEO/Europe 2025) and European Quantum Electronics Conference (EQEC 2025) Conference on Lasers and Electro-Optics/Europe (CLEO/Europe 2025) and European Quantum Electronics Conference (EQEC 2025) Optica Publishing Group cb_p_4 Circular polarization; Fourier transforms; Modes; Optical pumping; Streak cameras; Vertical cavity surface emitting lasers https://opg.optica.org/abstract.cfm?URI=CLEO_Europe-2025-cb_p_4 Uliana Diiankova Tobias Pusch Rainer Michalzik Mariusz Drong Markus Lindemann Nils C. Gerhardt Martin R. Hofmann inproceedings 10.1117/12.3043315 2025 10.1117/12.3043315 International Society for Optics and Photonics Vertical-Cavity Surface-Emitting Lasers XXIX 13384 SPIE Kent D. Choquette and Luke A. Graham 1338406 VCSEL, single-mode, single-frequency, TDLAS, oxygen, wavelength drift, spectroscopy Martin Grabherr Lin R. Borowski article Fuhrmann_2024 Nitrogen vacancy (NV) color centers in diamond have shown great potential for various applications in quantum technology due to their long coherence times, high sensitivity to magnetic fields and atomic scale resolution. However, one major challenge in utilizing near surface NV centers is the decoherence caused by spins and charges fluctuating on the surface, which affects the spin properties of the sensors. To reduce the induced noise, various oxygen surface treatments such as low power oxygen plasma treatment and annealing under oxygen atmosphere have been explored to terminate the diamond surface and reduce its impact on NV coherence. We showed that the NV center’s coherence time can be enhanced up to a factor of 3 over a large spectral range of noise. Double electron–electron resonance measurements revealed an extra source of decoherence, scaling similarly as the P1 spin bath. The improvement in coherence times is accompanied with an increase in measured ketone/ether content and reduction of sp2 signal in x-ray photoelectron spectroscopy measurements. Finally we compared the performance of different NV ensembles and surface treatments for sensing external proton spins. The oxygen annealing is an effective procedure of enhancing the spin coherence times and reducing broad band spin noise experienced by shallow implanted ensemble NV centers in diamond. 2024 12 10.1088/2633-4356/ad9376 Materials for Quantum Technology 4 IOP Publishing 041001 4 Jens Fuhrmann Johannes Lang Jochen Scharpf Nico Striegler Thomas Unden Philipp Neumann Joachim Bansmann Fedor Jelezko article PhysRevLett.132.223601 2024 5 10.1103/PhysRevLett.132.223601 Phys. Rev. Lett 132: American Physical Society 223601 Alon Salhov Qingyun Cao Jianming Cai Alex Retzker Fedor Jelezko Genko Genov article PhysRevMaterials.8.026203 2024 2 10.1103/PhysRevMaterials.8.026203 Phys. Rev. Mater 8: American Physical Society 026203 Christoph Findler Remi Blinder Karolina Schüle Priyadharshini Balasubramanian Christian Osterkamp Fedor Jelezko article Vijayan_2024 Photonic integrated circuits (PICs) based on the silicon-on-insulator platform currently allow high-density integration of optical and electro-optical components on the same chip. This high complexity is also transferred to quantum PICs, where non-linear processes are used for the generation of quantum light on the silicon chip. However, these intrinsically probabilistic light emission processes pose challenges to the ultimately achievable scalability. Here, an interesting solution would be employing on-demand sources of quantum light based on III–V platforms, which are nonetheless very complex to grow directly on silicon. In this paper, we show the integration of InAs quantum dots (QDs) on silicon via the growth on a wafer-bonded GaAs/Si template. To ensure emission in the telecom C-band (∼1550 nm), a metamorphic buffer layer approach is utilized. We show that the deposited single QDs show similar performance to their counterparts directly grown on the well-established GaAs platform. Our results demonstrate that on-demand telecom emitters can be directly and effectively integrated on silicon, without compromises on the performances of either the platforms. 2024 2 10.1088/2633-4356/ad2522 Materials for Quantum Technology 4 IOP Publishing 016301 1 Ponraj Vijayan Raphael Joos Marco Werner Jakob Hirlinger-Alexander Matthias Seibold Sergej Vollmer Robert Sittig Stephanie Bauer Fiona Braun Simone Luca Portalupi Michael Jetter Peter Michler article PhysRevLett.132.073601 2024 2 10.1103/PhysRevLett.132.073601 Phys. Rev. Lett 132: American Physical Society 073601 Peng Wang Lev Kazak Katharina Senkalla Petr Siyushev Ryotaro Abe Takashi Taniguchi Shinobu Onoda Hiromitsu Kato Toshiharu Makino Mutsuko Hatano Fedor Jelezko Takayuki Iwasaki article 10305258 2024 10.1109/LAWP.2023.3329586 IEEE Antennas and Wireless Propagation Letters 23 553-557 2 Impedance;Tensors;Geometry;Surface impedance;Surface waves;Silicon compounds;Periodic structures;Anisotropic metasurface;holographic antenna;impedance tensor extraction;metasurface antenna Thomas Frey Maximilian Döring Christian Waldschmidt Tobias Chaloun article Vbios14020075 Amperometry is arguably the most widely used technique for studying the exocytosis of biological amines. However, the scarcity of human tissues, particularly in the context of neurological diseases, poses a challenge for exocytosis research. Human platelets, which accumulate 90% of blood serotonin, release it through exocytosis. Nevertheless, single-cell amperometry with encapsulated carbon fibers is impractical due to the small size of platelets and the limited number of secretory granules on each platelet. The recent technological improvements in amperometric multi-electrode array (MEA) devices allow simultaneous recordings from several high-performance electrodes. In this paper, we present a comparison of three MEA boron-doped diamond (BDD) devices for studying serotonin exocytosis in human platelets: (i) the BDD-on-glass MEA, (ii) the BDD-on-silicon MEA, and (iii) the BDD on amorphous quartz MEA (BDD-on-quartz MEA). Transparent electrodes offer several advantages for observing living cells, and in the case of platelets, they control activation/aggregation. BDD-on-quartz offers the advantage over previous materials of combining excellent electrochemical properties with transparency for microscopic observation. These devices are opening exciting perspectives for clinical applications. 2024 10.3390/bios14020075 Biosensors 14 75 2 Rosalía González Brito Pablo Montenegro Alicia Méndez Ramtin E. Shabgahi Alberto Pasquarelli Ricardo Borges article Vetternpj 2024 10.1038/s41534-024-00893-y npj Quantum Information 10: 96 Philipp J. Vetter Thomas Reisser Maximilian G. Hirsch Tommaso Calarco Felix Motzoi Fedori Jelezko Matthias M. Müller article PhysRevLett.132.026901 2024 1 10.1103/PhysRevLett.132.026901 Phys. Rev. Lett 132: American Physical Society 026901 Katharina Senkalla Genko Genov Mathias H. Metsch Petr Siyushev Fedor Jelezko article doi:10.1021/acsnano.3c11739 2024 10.1021/acsnano.3c11739 ACS Nano 18 6406-6412 8 PMID: 38354307 Malo Bézard Antton Babaze Yuliya Mindarava Remi Blinder Valery Aleksandrovich Davydov Viatcheslav Agafonov Ruben Esteban Philippe Tamarat Javier Aizpurua Fedor Jelezko Brahim Lounis article BlinderComMat2024 2024 10.1038/s43246-024-00660-8 Communications Materials 5: 224 Remi Blinder Yuliya Mindarava Thai Hien Tran Ali Momenzadeh Sen Yang Petr Siyushev Hitoshi Sumiya Kenji Tamasaku Taito Osaka Norio Morishita Haruki Takizawa Shinobu Onoda Hideyuki Hara Fedor Jelezko J"org Wrachtrup Junichi Isoya article GULKA2024119062 Sensitive local monitoring of intracellular processes by quantum sensing utilizing nitrogen-vacancy (NV) centers in nanodiamonds (NDs), would greatly advance cell biology and medicine. However, NDs still fall behind in sensitivity compared to bulk diamond because of their much shorter NV relaxation times. As suggested in theoretical studies, prolongation of NV relaxation times should be achievable by surface optimization creating mixed H/O surface termination consisting of hydrogen atoms, hydroxyl groups, and C–O–C ether bridges. Here we target such chemistry by employing a non-thermal plasma (NTP) in a point-to-plain discharge configuration in aqueous solution. We have devised a set of experiments with different types of nanodiamond samples (of HPHT or detonation origin and with an H- or O-terminated surface) and four working gases (air, O2, He, and H2). Using FTIR, we have found that NTP modification induces a relative increase of O–H and C–H bonds with respect to CO bonds. We have observed the biggest changes in FTIR spectra and the greatest decrease in zeta potential with oxidized NDs (both detonation and HPHT) and hydrogen as the working gas. NV electron spin relaxation times of thus modified HPHT NDs indicate an improvement of the T1 time by ∼17%–∼29% and the T2 time prolongation of 40%. 2024 0008-6223 https://doi.org/10.1016/j.carbon.2024.119062 Carbon 224: 119062 Michal Gulka Priyadharshini Balasubramanian Ekaterina Shagieva Jakub Copak Josef Khun Vladimir Scholtz Fedor Jelezko Stepan Stehlik Petr Cigler article RezinkinRevSciInstr 2024 10.1063/5.0203162 Rev. Sci. Instrum 95: 104706 Oleg Rezinkin Marina Rezinkina Takuya Kitamura Rajan Paul Fedor Jelezko article doi:10.1021/jacs.3c07720 2024 10.1021/jacs.3c07720 Journal of the American Chemical Society 146 7222-7232 11 PMID: 38469853 Qi Lu Berlind Vosberg Zhenyu Wang Priyadharshini Balasubramanian Maabur Sow Carla Volkert Raul Gonzalez Brouwer Ingo Lieberwirth Robert Graf Fedor Jelezko Martin B. Plenio Yingke Wu Tanja Weil article BezardAVS2024 2024 10.1116/5.0216709 AVS Quantum Science 6: 031401 M. Bézard Y. Mindarava R. Blinder J B Trebbia P. Tamarat F. Jelezko B. Lounis article s24082409 This work presents a novel multielectrode array (MEA) to quantitatively assess the dose enhancement factor (DEF) produced in a medium by embedded nanoparticles. The MEA has 16 nanocrystalline diamond electrodes (in a cell-culture well), and a single-crystal diamond divided into four quadrants for X-ray dosimetry. DEF was assessed in water solutions with up to a 1000 µg/mL concentration of silver, platinum, and gold nanoparticles. The X-ray detectors showed a linear response to radiation dose (r2 ≥ 0.9999). Overall, platinum and gold nanoparticles produced a dose enhancement in the medium (maximum of 1.9 and 3.1, respectively), while silver nanoparticles produced a shielding effect (maximum of 37%), lowering the dose in the medium. This work shows that the novel MEA can be a useful tool in the quantitative assessment of radiation dose enhancement due to nanoparticles. Together with its suitability for cells’ exocytosis studies, it proves to be a highly versatile device for several applications. 2024 10.3390/s24082409 Sensors 24 2409 8 Patricia Nicolucci Guilherme Gambaro Kyssylla Monnyelle Araujo Silva Iara Souza Lima Oswaldo Baffa Alberto Pasquarelli inproceedings 10846704 2024 10.1109/ISAP62502.2024.10846704 2024 International Symposium on Antennas and Propagation (ISAP) 1-2 Antenna measurements;Surface impedance;Tensors;Surface waves;Shape;Gain measurement;Leaky wave antennas;Impedance;Silicon dioxide;Antenna radiation patterns;unit cell;hexagonal shape;leaky wave antenna;metasurface antenna;holographic antenna;glass technology Thomas Frey Aurel Baader Maximilian Döring Christian Waldschmidt Tobias Chaloun inproceedings 10732733 2024 10.23919/EuMC61614.2024.10732733 2024 54th European Microwave Conference (EuMC) 381-384 Microwave measurement;Antenna measurements;6G mobile communication;Semiconductor device measurement;Europe;Microwave communication;Reflector antennas;Microwave antenna arrays;Assembly;System analysis and design;Reflectarrays;reconfigurable intelligent surfaces;millimeter-wave antenna arrays;beam steering;Terahertz communications;sixth generation (6G);glass Susanne Brandl Mario Mueh Christian Waldschmidt inproceedings 10.1117/12.3000185 2024 10.1117/12.3000185 International Society for Optics and Photonics Vertical-Cavity Surface-Emitting Lasers XXVIII 12904 SPIE Chun Lei and Kent D. Choquette 129040C VCSEL, single-mode, fiber coupling, farfield, TDLAS, oxygen spectroscopy, spatial mode filter, fiber pigtail M. Grabherr M. Zorn Lin R. Borowski inproceedings 10501299 2024 10.23919/EuCAP60739.2024.10501299 2024 18th European Conference on Antennas and Propagation (EuCAP) 1-5 Geometry;Antenna measurements;Silicon compounds;Tensors;Optimization methods;Gain measurement;Leaky wave antennas;holographic antenna;impedance tensor;metasurface antenna;leaky wave;surface wave;high-gain;glass technology Thomas Frey Maximilian Döring Christian Waldschmidt Tobias Chaloun inproceedings 10590303 2024 10.1109/IMBioC60287.2024.10590303 2024 IEEE MTT-S International Microwave Biomedical Conference (IMBioC) 90-92 Fabrication;Chemical sensors;Resonant frequency;Sensor phenomena and characterization;Biomembranes;In vitro;Resonators;Microwave sensors;biosensors;millimeter wave;physiology;biological cells;lithography Philipp Hinz Mario Mueh Adrian Diepolder Giorgio Fois Manfred Frick Christian Damm inproceedings 10701615 2024 10.1109/ICEAA61917.2024.10701615 2024 International Conference on Electromagnetics in Advanced Applications (ICEAA) 164-167 Fabrication;Permittivity measurement;Microscopy;Resonant frequency;Lung;Biomembranes;Resonance;Frequency measurement;Positron emission tomography;In vitro;Microwave sensors;biosensors;millimeter wave;terahertz materials;biological cells;lithography Philipp Hinz Mario Mueh Adrian Diepolder Christian Damm inproceedings 10686993 2024 10.1109/AP-S/INC-USNC-URSI52054.2024.10686993 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI) 597-598 Antenna measurements;Frequency synthesizers;Conferences;Modulation;Gain measurement;Leaky wave antennas;Antennas and propagation Thomas Frey Maximilian Döring Christian Waldschmidt Tobias Chaloun article PhysRevLett.131.150801 2023 10 10.1103/PhysRevLett.131.150801 Phys. Rev. Lett 131: American Physical Society 150801 Nicolas Staudenmaier Anjusha Vijayakumar-Sreeja Genko Genov Daniel Cohen Christoph Findler Johannes Lang Alex Retzker Fedor Jelezko Santiago Oviedo-Casado article Genov_2023 Efficient initialization and manipulation of quantum states is important for numerous applications and it usually requires the ability to perform high fidelity and robust swapping of the populations of quantum states. Stimulated Raman adiabatic passage (STIRAP) has been known to perform efficient and robust inversion of the ground states populations of a three-level system. However, its performance is sensitive to the initial state of the system. In this contribution we demonstrate that a slight modification of STIRAP, where we introduce a non-zero single-photon detuning, allows for efficient and robust population swapping for any initial state. The results of our work could be useful for efficient and robust state preparation, dynamical decoupling and design of quantum gates in ground state qubits via two-photon interactions. 2023 2 10.1088/1361-6455/acb189 Journal of Physics B: Atomic, Molecular and Optical Physics 56 IOP Publishing 054001 5 Genko T Genov Simon Rochester Marcis Auzinsh Fedor Jelezko Dmitry Budker article 10081282 2023 10.1109/OJAP.2023.3261903 IEEE Open Journal of Antennas and Propagation 4: 392-407 Impedance;Tensors;Radar antennas;Surface impedance;Antenna measurements;Aperture antennas;Antenna feeds;Holographic antenna;metasurface antenna;multi-feed antenna;multi-beam antenna;surface wave;leaky wave;monopulse radar;glass technology Thomas Frey Maximilian Döring Nico Riese Christian Waldschmidt Tobias Chaloun article doi:10.1021/acsaelm.3c01141 2023 10.1021/acsaelm.3c01141 ACS Applied Electronic Materials 5 6603-6610 12 Rakshyakar Giri Rasmus Ho̷y Jensen Deepak Khurana Juanita Bocquel Ilya P. Radko Johannes Lang Christian Osterkamp Fedor Jelezko Kirstine Berg-Sørensen Ulrik L. Andersen Alexander Huck inproceedings 9784386 2022 10.23919/EuMC50147.2022.9784386 2021 51st European Microwave Conference (EuMC) 825-828 Antenna measurements;Microwave antennas;Analytical models;Microwave technology;Glass;Bandwidth;Radar antennas;Conical beam;frequency-scanning;glass technology;high-gain;holographic antenna;millimeter-wave radar Thomas Frey Andre Dürr Christian Waldschmidt Tobias Chaloun inproceedings 9769556 2022 10.23919/EuCAP53622.2022.9769556 2022 16th European Conference on Antennas and Propagation (EuCAP) 1-5 Geometry;MIMO radar;Glass;Antenna feeds;Radar antennas;Minimization;Impedance;multi-feed antenna;holographic antenna;metasurface antenna;multiple-input-multiple-output (MIMO);glass technology;high-gain Thomas Frey Maximilian Döring Christian Waldschmidt Tobias Chaloun article 9188005 2020 10.1109/LAWP.2020.3022520 IEEE Antennas and Wireless Propagation Letters 19 2067-2071 12 Glass;Impedance;Antennas;Surface waves;Antenna measurements;Surface impedance;Tensile stress;Antenna;glass;hermetically sealed;holographic;package;through-glass-via (TGV) Thomas Galler Thomas Frey Christian Waldschmidt Tobias Chaloun