Article
Optics
Hai-Tao Tu, Kai-Yu Liao, Zuan-Xian Zhang, Xiao-Hong Liu, Shun-Yuan Zheng, Shu-Zhe Yang, Xin-Ding Zhang, Hui Yan, Shi-Liang Zhu
Summary: High-resolution quantum-dot LEDs demonstrated using transfer printing could be beneficial for next-generation displays. Coherent microwave-to-optics transduction is achieved using Rydberg atoms and off-resonant scattering technique, with high efficiency and wide bandwidth.
Article
Engineering, Electrical & Electronic
Tao Lin, Yuehui Wang, Zihang Zhu, Zhike Zhang, Shanghong Zhao, Jianguo Liu, Canwen Zou
Summary: This paper proposes and demonstrates an efficient Photonics Time-Delayed Mixer (PTDM) utilizing Carrier-Suppressed Dual-Sideband (CS-DSB) modulation to eliminate the carrier component, ensure proportional phase response to frequency conversion, and achieve tunable power response. The compact structure of PTDM enables it to resist dispersion-induced power fading (DIPF).
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Philipp Taeschler, Mathieu Betrand, Barbara Schneider, Matthew Singleton, Pierre Jouy, Mattias Beck, Jerome Faist
Summary: Near-transform-limited 630 fs pulses with 4.5 W of peak power are generated by compensating the dispersion of a quantum cascade laser emitting around 8 µm. Their temporal nature is assessed by a new method called asynchronous upconversion sampling. This study opens up new pathways for nonlinear physics in the mid-infrared.
Article
Optics
Yue Wei, Xiaojuan Wang, Biao Xiong, Chengsong Zhao, Jibing Liu, Chuanjia Shan
Summary: The study introduces a coherent feedback loop in an optomechanical system to enhance few-photon effects; improvement of photon blockade effect with feedback is shown through second-order correlation function, even when cavity decay rate is larger than the coupling coefficient; tunneling effect can also be enhanced by feedback as demonstrated through third-order correlation function.
Article
Optics
Feng Zhou, Xiyuan Lu, Ashutosh Rao, Jordan Stone, Gregory Moille, Edgar Perez, Daron Westly, Kartik Srinivasan
Summary: A novel scheme, called hybrid-mode-family OPO (hOPO), is proposed in this study, which uses different families of transverse spatial modes for optical parametric oscillation. Compared to traditional single-mode-family OPO, hOPO shows better robustness in dispersion, device geometry, pump frequency, and temperature, and is capable of generating coherent visible and infrared light sources efficiently.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Multidisciplinary
Zhi Luo, Liang Zeng, Jing Lin
Summary: Two time-frequency domain dispersion analysis methods for broadband Lamb wave are proposed in this article, which can effectively represent multimodal Lamb wave signals with high resolution. Additionally, a mode purification strategy is also proposed for distinguishing the interested mode from interferences.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Optics
Wenle Weng, Miles H. Anderson, Anat Siddharth, Jijun He, Arslan S. Raja, Tobias J. Kippenberg
Summary: This study utilizes Turing rolls in optical Kerr microresonators to extract terahertz frequency signals, achieving low-noise microwave signal synthesis through electro-optic modulation and microcomb. The stabilization of terahertz oscillations to a microwave reference via intracavity power modulation significantly improves fractional frequency instabilities, paving the way for bidirectional terahertz-to-microwave links with hybrid optical-frequency-comb techniques.
Article
Optics
Xiongchao Liu, Tao Shang, Dan Chen, Xiaohai Wu
Summary: A simple broadband dispersion compensation and frequency conversion scheme based on a typical commercial dual-parallel Mach-Zehnder modulator is proposed, providing single-frequency dispersion compensation and power complementarity, resulting in fully compensated RF signal power levels across a large frequency range.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Physics, Multidisciplinary
A. Kandala, K. X. Wei, S. Srinivasan, E. Magesan, S. Carnevale, G. A. Keefe, D. Klaus, O. Dial, D. C. McKay
Summary: This study introduces a novel coupling architecture for transmon qubits that improves two-qubit gate performance and suppresses cross talk; by using two fixed frequency coupling elements, it achieves intrinsic suppression of static ZZ while maintaining large effective coupling rates; through cross-resonance interaction, a 180 ns single-pulse controlled NOT (CNOT) gate with a fidelity of 99.77% is demonstrated.
PHYSICAL REVIEW LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Huake Wang, Yinghui Quan, Guisheng Liao, Shengqi Zhu, Jingwei Xu, Lei Huang
Summary: The proposed method in this study improves radar range resolution by using space-time coding technology to shift the frequency band of each pulse to synthesize a full bandwidth. This transmit diversity technique can flexibly synthesize the transmit beampattern without degrading range resolution.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Optics
Sizhu Jiang, Dmitrii Belogolovskii, Suruj S. Deka, Si Hui Pan, Yeshaiahu Fainman
Summary: This experimental study demonstrates bridge-coupled metallo-dielectric nanolasers that can operate in different modes at room temperature, with stable operation supported by varying the length of the bridge. Both designs have been fabricated and characterized, confirming their lasing behavior through spectral evolution, light-in light-out characteristics, and emission linewidth narrowing. The operating mode is identified through near-field and far-field emission pattern measurements, marking the first demonstration of mode selection in bridge-coupled metallo-dielectric nanolasers.
Article
Optics
Meng Qiao, Yingyu Chen, Dawei Wang, Zhaohui Li
Summary: Optical parameter estimation based on coherent optical receivers' data is crucial for optical performance monitoring and stable operation of receiver digital signal processing. A robust multi-parameter estimation is challenging due to interference from various system effects. By utilizing cyclostationary theory, we have developed a joint estimation strategy for chromatic dispersion, frequency offset, and optical signal-to-noise ratio that is resistant to random polarization effects, including polarization mode dispersion and polarization rotation. Our method is validated through numerical simulation and field optical cable experimentation.
Article
Engineering, Mechanical
Yitong Guo, Ping Zhou, Zhao Yao, Jun Ma
Summary: The study investigates how the auditory system in animals captures external sound signals and proposes a piezoelectric neuron to study the physical mechanism of frequency selection and filtering. The addition of noise can enhance nonlinear resonance, and mode selection is studied by carefully controlling the noise intensity.
NONLINEAR DYNAMICS
(2021)
Article
Optics
Jinpeng Yuan, Hao Liu, Lirong Wang, Liantuan Xiao, Suotang Jia
Summary: A stable and continuously tunable 420 nm coherent blue light was generated in Rb vapor through cavity-enhanced four-wave mixing process, with high output power and stability. The generated laser has good beam qualities and potential applications in photon-atom interactions.
Article
Engineering, Electrical & Electronic
Tao Gui, Xuefeng Wang, Ming Tang, Yi Yu, Yanzhao Lu, Liangchuan Li
Summary: The study introduces and demonstrates homodyne coherent detection in a short-distance data center interconnect with bidirectional fiber transmission. By using an uncooled LD and simplifying digital signal processing, the proposed system shows potential as an attractive solution for future data center optical interconnects.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Clinical Neurology
Frauke Stascheit, Ulrike Grittner, Sarah Hoffmann, Philipp Mergenthaler, Michael Schroeter, Tobias Ruck, Mark Pawlitzki, Franz Blaes, Julia Kaiser, Ulrike Schara, Adela Della-Marina, Andrea Thieme, Tim Hagenacker, Christian Jacobi, Benjamin Berger, Peter P. Urban, Karl Christian Knop, Berthold Schalke, De-Hyung Lee, Petra Kalischewski, Heinz Wiendl, Andreas Meisel
Summary: Current immunosuppressive therapy (IST) increases the severity of COVID-19 in patients with myasthenia gravis, but it does not increase the risk of SARS-CoV-2 infection. Therefore, effective strategies should be implemented to prevent COVID-19 in this high-risk group.
JOURNAL OF NEUROLOGY
(2023)
Article
Materials Science, Multidisciplinary
Benjamin Beeler, Yongfeng Zhang, A. T. M. Jahid Hasan, Gyuchul Park, Shenyang Hu, Zhi-Gang Mei
Summary: This study presents molecular dynamics simulations of the formation energy of point defects under applied stress. This work is crucial for implementing stress-dependent microstructural evolution models of nuclear fuels to ensure the reliability and predictability of research reactor fuels.
Article
Mathematics
Benjamin Bakker, Yohan Brunebarbe, Jacob Tsimerman
Summary: In this paper, we prove Griffiths' conjecture on the quasi-projectivity of images of period maps using algebraization results from o-minimal geometry. We develop a theory of analytic spaces and coherent sheaves that are definable with respect to a given o-minimal structure, and prove a GAGA-type theorem algebraizing definable coherent sheaves on complex algebraic spaces. We then combine this with Artin's algebraization theorems to show that proper definable images of complex algebraic spaces are algebraic. Applying this to period maps, we conclude that the images of period maps are quasi-projective and that the restriction of the Griffiths bundle is ample.
INVENTIONES MATHEMATICAE
(2023)
Article
Materials Science, Multidisciplinary
Gyuchul Park, Benjamin Beeler, Maria A. Okuniewski
Summary: Low enriched uranium-molybdenum (U-Mo) monolithic fuel is being qualified to replace highly-enriched uranium fuel. The behavior of fission gas bubbles under irradiation, which affects fuel swelling and failure, is being studied. Diffusion coefficients of U, Mo, and Xe in gamma U-10wt. % Mo under irradiation conditions were calculated and the total diffusion coefficients were determined. The updated diffusion coefficients will be used in fuel models to predict the behavior of fission gas bubbles more accurately.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Physics, Applied
Carolin Lueders, Jano Gil-Lopez, Markus Allgaier, Benjamin Brecht, Marc Assmann, Christine Silberhorn, Manfred Bayer
Summary: Streak cameras are commonly used devices with picosecond time resolution to measure pulsed emission, but they are not efficient in detecting infrared and telecom signals. In this study, we present a frequency conversion technique based on sum-frequency generation, which allows the detection of infrared signals in the visible range using a streak camera while preserving their temporal properties. The functionality of our device is demonstrated by converting the emission from a quantum dot laser.
PHYSICAL REVIEW APPLIED
(2023)
Article
Medicine, Research & Experimental
Marion Anliker-Ort, Jasper Dingemanse, Stephane Delahaye, Lubos Janu, John van den Anker, Benjamin Berger, Priska Kaufmann
Summary: ACT-1014-6470 is an orally available C5a receptor antagonist that can be used in the treatment of auto-inflammatory diseases. It has a weak inhibitory effect on CYP2C19 and CYP3A4 enzymes in human liver microsomes.
CTS-CLINICAL AND TRANSLATIONAL SCIENCE
(2023)
Article
Clinical Neurology
Vojtech Travnicek, Petr Klimes, Jan Cimbalnik, Josef Halamek, Pavel Jurak, Benjamin Brinkmann, Irena Balzekas, Chifaou Abdallah, Francois Dubeau, Birgit Frauscher, Greg Worrell, Milan Brazdil
Summary: High-frequency oscillations are potential biomarkers for localizing the epileptogenic zone in patients with pharmacoresistant focal epilepsy. This study proposes using relative entropy as a novel biomarker, which showed comparable performance to high-frequency oscillations but has advantages such as easy calculation and a universal threshold.
Article
Materials Science, Multidisciplinary
Yuhao Wang, Benjamin Beeler, Andrea Jokisaari
Summary: In this study, the fundamental bulk properties and energetic and thermodynamic properties of single point defects and di-defects in alpha-uranium were determined using molecular dynamics, providing valuable insights into the possible mechanisms of the complex irradiation damage behavior of alpha-uranium. The results showed that the diffusion and formation energy of defects in alpha-uranium were temperature-dependent, and the binding energy of low-energy impurities was lower than that of high-energy impurities.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Physics, Multidisciplinary
Federico Pegoraro, Philip Held, Sonja Barkhofen, Benjamin Brecht, Christine Silberhorn
Summary: In real photonic quantum systems, losses limit scalability and application in fields such as quantum information and communication. Efforts have been made to improve particle sources and system components, and post-selection methods have been used to mitigate the effect of losses. However, the impact of losses on the behavior of the surviving subset of a multi-particle system has not been studied.
Article
Quantum Science & Technology
Matteo Santandrea, Kai-Hong Luo, Michael Stefszky, Jan Sperling, Harald Herrmann, Benjamin Brecht, Christine Silberhorn
Summary: The paper investigates the performance of lossy SU(1,1) interferometers for single-photon pairs and examines the information contained in single counts and coincidences at the output. The classical Fisher information (FI) of both single and coincidence events is derived and studied as a function of internal and external losses. It is found that, in the absence of external losses, the FI of coincidence events is always higher or equal to that of single events. However, with external losses, the FI of single events can surpass that of coincidences. Additionally, coincidence measurement can help mitigate the effect of internal losses in the absence of external losses. Finally, when internal losses are above 50%, SU(1,1) interferometers outperform classical SU(2) interferometers.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Quantum Science & Technology
Laura Serino, Jano Gil-Lopez, Michael Stefszky, Raimund Ricken, Christof Eigner, Benjamin Brecht, Christine Silberhorn
Summary: In this work, a newly developed device called the multi-output quantum pulse gate (MQPG) is used to demultiplex five-dimensional temporal modes (TM) of single photons. The average fidelity of the demultiplexing is 0.96 +/- 0.01, and the MQPG shows high-quality operation as confirmed by resource-efficient state tomography with an average fidelity of 0.98 +/- 0.02. These results demonstrate the feasibility of using MQPG as a receiver in high-dimensional quantum key distribution.
