Article
Chemistry, Multidisciplinary
Yongsheng Zhao, Fengyun Yan, Xue Liu, Hongfeng Ma, Zhenyu Zhang, Aisheng Jiao
Summary: The influence of electric field on thermal conductivity of diamond in different crystal orientation groups was investigated using first-principles calculations. The results revealed that electric field can break the symmetry of diamond lattice and affect the thermodynamic and phonon properties of diamond, leading to changes in its thermal conductivity.
Article
Quantum Science & Technology
Yulei Chen, Zhonghao Li, Hao Guo, Dajin Wu, Jun Tang
Summary: The quantum diamond microscope demonstrates the capability of simultaneously imaging magnetic fields and temperature with high sensitivity and resolution. The wide-field imaging technique shows great potential in practical applications.
EPJ QUANTUM TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Zhenrong Shi, Zhonghao Li, Yanling Liang, Hao Zhang, Huanfei Wen, Hao Guo, Zongmin Ma, Jun Tang, Jun Liu
Summary: The diamond nitrogen-vacancy (NV) center, as a highly sensitive quantum magnetometer, has the ability to operate in extreme environments and produce wide-field magnetic imaging with high resolution. By using a multichannel control system (MCCS), the diamond NV center microscope is able to reduce scanning time, increase imaging speed, and improve solution efficiency. This novel approach has significant implications for medical visualization, scientific research, and electronic circuit anomaly diagnosis.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yosuke Sasama, Taisuke Kageura, Masataka Imura, Kenji Watanabe, Takashi Taniguchi, Takashi Uchihashi, Yamaguchi Takahide
Summary: This study demonstrates that wide-bandgap heterojunction field-effect transistors with a hydrogen-terminated diamond channel and hexagonal boron nitride gate insulator can be created without surface transfer doping. These transistors exhibit low sheet resistance, large ON current, high room-temperature Hall mobility, and normally OFF behavior with a high ON/OFF ratio.
NATURE ELECTRONICS
(2022)
Article
Neurosciences
Chi Ren, Takaki Komiyama
Summary: Wide-field calcium imaging, combined with genetically encoded calcium indicators, allows for real-time capture of cortex-wide dynamics in behaving animals and has revealed unprecedented scale of cortical dynamics during various cognitive processes.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jungbae Yoon, Jun Hwan Moon, Jugyeong Chung, Yu Jin Kim, Kihwan Kim, Hee Seong Kang, Yoo Sang Jeon, Eunsoo Oh, Sun Hwa Lee, Kihoon Han, Dongmin Lee, Chul-Ho Lee, Young Keun Kim, Donghun Lee
Summary: A barcode magnetic nanowire is a multi-layered magnetic structure with more than one segment type. It has attracted significant attention in bioengineering due to selective functionalization and novel interactions between layers. However, analyzing the magnetic properties of individual nanowires remains challenging. This study investigates the characterization of a single magnetic nanowire based on magnetic images obtained via wide-field quantum microscopy, allowing for extraction of critical magnetic properties.
Article
Biochemical Research Methods
Joao Couto, Simon Musall, Xiaonan R. Sun, Anup Khanal, Steven Gluf, Shreya Saxena, Ian Kinsella, Taiga Abe, John P. Cunningham, Liam Paninski, Anne K. Churchland
Summary: Measurements of neuronal activity across different brain areas are crucial for understanding the neural correlates of cognitive and motor processes. Wide-field imaging of genetically encoded indicators is a high-throughput, cost-effective, and flexible approach that allows high temporal resolution measurements of specific cell populations and a cortex-wide field of view.
Article
Optics
Diganta Rabha, Sritam Biswas, Nabadweep Chamuah, Manab Mandal, Pabitra Nath
Summary: A high resolution, wide-field 'multi-modal' microscopic imaging system using a smartphone was reported, with a compact plastic optical setup and three dynamically adaptable imaging modes. The system demonstrated high spatial resolution and large field of view, suitable for imaging micro-beads and other biological samples.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Xiaochun Chen, Yezheng Hu, Yukai Wo, Xuri Huang, Yubo Yue, Weiping Cao, Kang Chen
Summary: The Marchenko method allows for the retrieval of Green's functions between virtual sources and receivers in the subsurface from single-sided reflection data. By using an optimal aperture-bounded crosscorrelation imaging condition, unwanted interference can be eliminated and a high-resolution image can be obtained. The effectiveness of this method has been demonstrated through synthetic and field data tests.
Article
Engineering, Multidisciplinary
Reza Sohbati, Myungho Kook, Mayank Jain, Kristina J. Thomsen, Andrew S. Murray
Summary: We have demonstrated a wide-field alpha-particle imaging system that utilizes an EMCCD camera and detects alpha-induced scintillation light from a ZnS:Ag screen. An efficient image processing algorithm has been developed to remove noise and locate alpha particle interactions in EMCCD images, making it particularly suitable for imaging low-activity samples. The system has a relative counting efficiency of 50% compared to a PMT-based alpha counter and can detect alpha particles at a resolution of <480 μm over a 45 x 45mm imaging area. Imaging of a granite sample using this system reveals a correlation between the resulting alpha image and the micro XRF-determined element map, indicating that most of the alpha activity in the sample is concentrated in dark-colored Ba-rich veins and inclusions at mineral grain boundaries.
Article
Engineering, Electrical & Electronic
Joon Sang Kang, Man Li, Huan Wu, Huuduy Nguyen, Toshihiro Aoki, Yongjie Hu
Summary: Thermal management is crucial in electronic systems, and the integration of novel semiconductor materials like boron arsenide and boron phosphide with other materials such as gallium nitride can significantly improve cooling performance and reduce hot-spot temperatures in high-electron-mobility transistors.
NATURE ELECTRONICS
(2021)
Article
Thermodynamics
Chao Dong, Yun Zheng, Kesheng Shen, Hongchao Liu, Jun Zhang, Shiqiang Xia, Xianzhou Zhang, Yufang Liu, Hai Lu
Summary: The present study proposes a mid-infrared thermal emitter based on Fibonacci quasi-periodic structure, which has good angular and polarizationin-dependent selective thermal emission performance. The designed thermal emitter has advantages in polarization-independence, lack of scale restraint, low cost and wide vision.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Editorial Material
Engineering, Electrical & Electronic
Samuel Graham, Sukwon Choi
Summary: Boron arsenide can be used as a high-thermal-conductivity cooling substrate in gallium nitride power devices.
NATURE ELECTRONICS
(2021)
Article
Optics
Tian Jin, Weizhi Qi, Xiao Liang, Heng Guo, Quanying Liu, Lei Xi
Summary: Neuroimaging techniques can reveal complex brain functions associated with behaviors and emotions, but most suffer from tradeoffs in temporal and spatial resolutions. PANI offers high spatiotemporal resolution and a wide FOV, enabling investigation of fast neural dynamics and connectivity in the mouse cortex.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Environmental
Jia-wan Peng, Feng-lin Zhang, Yu-mei Zhou, Ling-kang Xiong, Yao-jie Huang, Hong-qun Tang
Summary: This study proposes a novel method to fabricate a thin plate of diamond/copper composite based on the construction of a single-layer close packed diamond particles network. The composite exhibits high thermal conductivity, tunable coefficient of thermal expansion, and excellent mechanical properties. It also demonstrates better heat dissipation ability compared to pure copper plate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Sigurd Flagan, Daniel Riedel, Alisa Javadi, Tomasz Jakubczyk, Patrick Maletinsky, Richard J. Warburton
Summary: The nitrogen-vacancy (NV) center in diamond, with a highly coherent, optically addressable electron spin, is a promising candidate for a node in a quantum network. A resonant microcavity can enhance the flux of coherent photons emitted from single NV centers. In this study, an open Fabry-Perot microcavity geometry containing a single-crystal diamond membrane is presented, which operates in a regime where the vacuum electric field is strongly confined to the diamond membrane.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jodok Happacher, David A. Broadway, Juanita Bocquel, Patrick Reiser, Alejandro Jimenez, Marta A. Tschudin, Lucas Thiel, Dominik Rohner, Marcel li Grimau Puigibert, Brendan Shields, Jeronimo R. Maze, Vincent Jacques, Patrick Maletinsky
Summary: We investigate the magnetic field dependent photophysics of individual nitrogen-vacancy (NV) color centers in diamond under cryogenic conditions. At different magnetic fields, we observe significant reductions in the NV photoluminescence rate, indicating a decrease in the optical readout efficiency of the NV's ground state spin. This study provides new insights into the structure of the NVs' excited states and offers a new tool for effective characterization, which can be used to study strain-dependent variations, NV charge state dynamics, and the applicability of NV centers for low-temperature quantum sensing.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Hai Zhong, Aurore Finco, Johanna Fischer, Angela Haykal, Karim Bouzehouane, Cecile Carretero, Florian Godel, Patrick Maletinsky, Mathieu Munsch, Stephane Fusil, Vincent Jacques, Vincent Garcia
Summary: Scientists have successfully imaged two stable spin cycloids in BiFeO3 epitaxial thin films using a commercial scanning N-V magnetometer. Each ferroelectric domain is coupled to a single spin cycloid, forming a unique magnetic pattern. By manipulating these ferroelectric domains at the local scale using piezoresponse force microscopy, researchers have gained insights into the physical parameters and impact of each spin-cycloid type on the magnetic field.
PHYSICAL REVIEW APPLIED
(2022)
Article
Multidisciplinary Sciences
A. Haykal, R. Tanos, N. Minotto, A. Durand, F. Fabre, J. Li, J. H. Edgar, V Ivady, A. Gali, T. Michel, A. Dreau, B. Gil, G. Cassabois, V Jacques
Summary: This study investigates the isotope-dependent properties of spin defects in hexagonal boron nitride (hBN) crystals and discovers that the spin coherence properties are slightly improved in B-10 enriched samples. Additionally, dark electron spin impurities are identified as an additional source of decoherence for the spin defects.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Yoann Baron, Alrik Durand, Peter Udvarhelyi, Tobias Herzig, Mario Khoury, Sebastien Pezzagna, Jan Meijer, Isabelle Robert-Philip, Marco Abbarchi, Jean-Michel Hartmann, Vincent Mazzocchi, Jean-Michel Gerard, Adam Gali, Vincent Jacques, Guillaume Cassabois, Anais Dreau
Summary: This study demonstrates the detection of single intrinsic defects in silicon and reveals new information about their radiation damage center properties. The microscopic structure and radiative recombination mechanism of these defects below the silicon bandgap are identified. These results are of great significance for conducting quantum research based on intrinsic luminescent defects in silicon.
Article
Biochemical Research Methods
Ljiljana Durdevic, Aroa Relano Gines, Antoine Roueff, Guillaume Blivet, Guillaume Baffou
Summary: Quantitative phase microscopies (QPMs) enable label-free, non-invasive observation of living cells in culture for extended periods. This study utilizes cross-grating wavefront microscopy (CGM) to measure the dry mass of individual neurites of primary neurons. The algorithm for dry-mass measurement of neurites from CGM images is detailed and provided. The high precision of the measurements obtained using CGM and the semi-manual algorithm allows for the detection of periodic oscillations in neurites, showcasing the accuracy of CGM in capturing cellular dynamics.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Jiawen Liu, Djamal Gacemi, Konstantinos Pantzas, Gregoire Beaudoin, Isabelle Sagnes, Angela Vasanelli, Carlo Sirtori, Yanko Todorov
Summary: An optomechanical scheme is presented to achieve light-controlled logic functions by combining an electromagnetic resonator with a strongly nonlinear nanomechanical oscillator. The nonlinear mechanical oscillations, controlled by external drives, are sensitive to incident light due to enhanced light-matter interactions. Reconfigurable logic functions (NOT, XOR, OR, AND) can be realized by adjusting the initial mechanical configurations to obtain various responses to input optical signals.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Guillaume Baffou
Summary: This Review discusses a cutting-edge wavefront imaging technique called quadriwave lateral shearing interferometry (QLSI) that utilizes a 2-dimensional diffraction grating in front of a regular camera. The working principle and implementation of QLSI on an optical microscope are detailed. The microscopy applications of QLSI in bioimaging and nanophotonics for the characterization of various samples are highlighted. A critical comparison between QLSI and current quantitative phase microscopy techniques is also presented.
Article
Mathematics, Applied
Soizic Terrien, Bernd Krauskopf, Neil G. R. Broderick, Venkata A. Pammi, Remy Braive, Isabelle Sagnes, Gregoire Beaudoin, Konstantinos Pantzas, Sylvain Barbay
Summary: In this study, the emergence of complex pulsing dynamics, including periodic, quasiperiodic, and irregular pulsing regimes, in an excitable microlaser subject to delayed optical feedback is investigated. A mathematical model, written as a system of delay differential equations, is used to perform an in-depth bifurcation analysis. Resonance tongues are found to play a key role in the emergence of complex dynamics.
Article
Optics
Baptise Chomet, Nathan Vigne, Gregoire Beaudoin, Konstantinos Pantzas, Stephane Blin, Isabelle Sagnes, Stephane Denet, Arnaud Garnache
Summary: The emission dynamics of a multimode broadband interband semiconductor laser have been examined through experimentation and theory. The study reveals the presence of a modulational instability in the nonlinear dynamics of a III-V semiconductor quantum well surface-emitting laser, observed in the anomalous dispersion regime. An additional unstable region arises in the normal dispersion regime due to carrier dynamics, which is not found in systems with fast gain recovery. The interplay between cavity dispersion and phase sensitive non-linearities is shown to significantly impact the laser emission behavior.
Article
Nanoscience & Nanotechnology
Elena Mikheeva, Remi Colom, Patrice Genevet, Frederic Bedu, Igor Ozerov, Samira Khadir, Guillaume Baffou, Redha Abdeddaim, Stefan Enoch, Julien Lumeau
Summary: With laser-annealing technology, we propose a novel approach to design and fabricate phase-gradient Huygens metasurfaces by using uniform particles made of As2S3 chalcogenide glass. Instead of tuning the geometry, we realize a phase gradient metasurface by tuning the refractive index of identical meta-atoms. By locally changing the refractive index of As2S3 particles using short-wavelength illumination, we can adjust the phase pattern of the metasurface after fabrication. The potential advantages of our method for low-cost mass production of large-scale metasurfaces lie in the use of uniform geometries.
Article
Quantum Science & Technology
B. Burgler, T. F. Sjolander, O. Brinza, A. Tallaire, J. Achard, P. Maletinsky
Summary: Solid state spins, particularly the Nitrogen-Vacancy (NV) center in diamond, have demonstrated great potential for quantum sensing applications. However, the dominant quantum sensing schemes using microwave or radio-frequency driving have limitations in miniaturization, energy efficiency, and non-invasiveness. In this study, we propose a purely optical approach to coherent quantum sensing using the NV center's N-15 nuclear spin, and demonstrate all-optical free-induction decay measurements on both single spins and spin ensembles. Our results open up possibilities for highly compact quantum sensors in challenging environments.
NPJ QUANTUM INFORMATION
(2023)
Article
Biophysics
Maelle Benefice, Aurore Gorlas, Baptiste Marthy, Violette Da Cunha, Patrick Forterre, Anne Sentenac, Patrick C. Chaumet, Guillaume Baffou
Summary: Quantitative phase microscopy (QPM) is a noninvasive method that provides high contrast cell observation and quantitative measurement of dry mass (DM) and growth rate at the single-cell level. This article demonstrates the use of high-resolution and high-sensitivity cross-grating wavefront microscopy for accurate DM measurement of bacteria and archaea. The article also introduces the concepts of normalized optical volume and optical polarizability (OP) to gain additional information beyond DM.
BIOPHYSICAL JOURNAL
(2023)
Article
Environmental Sciences
Jingfeng Liu, Luyao Xin, Lixia Qin, Taiyang Zhang, Xiangqing Li, Shi-Zhao Kang
Summary: A flexible SERS sensing platform was developed to monitor the concentration of benzotriazole in water. The platform showed high sensitivity with a detection limit of 0.01 nmol L-1 and excellent repeatability and reproducibility. This research is important for real-time monitoring of trace benzotriazole in tap water.
Article
Engineering, Electrical & Electronic
Igor Veremchuk, Pavlo Makushko, Natascha Hedrich, Yevhen Zabila, Tobias Kosub, Maciej Oskar Liedke, Maik Butterling, Ahmed G. Attallah, Andreas Wagner, Ulrich Burkhardt, Oleksandr Pylypovskyi, Rene Huebner, Juergen Fassbender, Patrick Maletinsky, Denys Makarov
Summary: In this study, high-quality polycrystalline Cr2O3 material with a density close to that of a single crystal was fabricated using spark plasma sintering. The sample exhibited a preferential texture on the surface. The all-electric control of the antiferromagnetic state and linear magnetoelectric effect of the sample was achieved through the spin Hall magnetoresistance effect at the Pt electrode interface with Cr2O3. Magnetotransport characterization showed that the sample had the same magnetic phase transition temperature as a single crystal and possessed a granular structure with small antiferromagnetic domains. The study suggests the potential of polycrystalline Cr2O3 samples for research in antiferromagnetic spintronics.
ACS APPLIED ELECTRONIC MATERIALS
(2022)