Article
Engineering, Electrical & Electronic
Laura Mercade, Eloy Rico, Jesus Ruiz Garnica, Juan Carlos Gomez, Amadeu Griol, Miguel A. Piqueras, Alejandro Martinez, Vanessa C. Duarte
Summary: The realization of photonic microwave oscillators using optomechanical cavities has become a reality. By pumping the cavity with a blue-detuned laser, the input signal gets modulated by highly-coherent tones at integer multiples of the mechanical resonance. Implementing optomechanical cavities on released films with high index of refraction can lead to highly-stable signals in the microwave domain upon photodetection. OMOs are very promising candidates to build ultra-low weight photonics-based microwave oscillators for SATCOM applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Ke Wang, Gang Xu, Fei Gao, He Liu, Rong-Long Ma, Xin Zhang, Zhanning Wang, Gang Cao, Ting Wang, Jian-Jun Zhang, Dimitrie Culcer, Xuedong Hu, Hong-Wen Jiang, Hai-Ou Li, Guang-Can Guo, Guo-Ping Guo
Summary: Hole-spin qubits in germanium show promise for rapid, all-electrical qubit control. The authors demonstrate ultrafast single-spin manipulation in a hole-based double quantum dot in a germanium hut wire, with a record Rabi frequency exceeding 540 MHz. These results suggest the potential for ultrafast coherent control of hole spin qubits to meet the requirements for scalable quantum information processing.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
V. P. Michal, J. C. Abadillo-Uriel, S. Zihlmann, R. Maurand, Y. -M. Niquet, M. Filippone
Summary: We study a spin circuit-QED device, where a superconducting microwave resonator is connected to a single hole confined in a semiconductor quantum dot via capacitance. The gyromagnetic g matrix of the hole can be electrically modulated due to the strong spin-orbit coupling inherent in valence-band states. This modulation allows for coupling between the photons in the resonator and the hole spin. We demonstrate that the spin-photon interaction can be controlled through gate voltages and magnetic field orientation, and the character of the interaction can switch from fully transverse to fully longitudinal.
Article
Materials Science, Multidisciplinary
Yang Liu, Jia-Xin Xiong, Zhi Wang, Wen-Long Ma, Shan Guan, Jun-Wei Luo, Shu-Shen Li
Summary: Fast spin control in germanium hole-spin qubits is achieved through electric dipole spin resonance (EDSR) by utilizing the finite k-linear Rashba SOC of 2D holes, which compensates for the lack of Dresselhaus SOC in centrosymmetric germanium materials.
Article
Materials Science, Multidisciplinary
A. O. Zakhar'in, A. V. Andrianov, A. G. Petrov, N. V. Abrosimov, R. Kh. Zhukavin, V. N. Shastin
Summary: A new mechanism for the excitation of impurity related terahertz radiation in semiconductors under the conditions of exciton condensation into an electron-hole liquid is reported. Impurity centers interact with plasmons localized on droplets of an electron-hole liquid, leading to ionization of the centers and subsequent terahertz radiative transitions. The impurity centers act as antennas converting the electromagnetic field into radiation, with experiments conducted on lithium-doped silicon crystals at helium temperatures.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Christoph Adelsberger, Stefano Bosco, Jelena Klinovaja, Daniel Loss
Summary: This paper analyzes the dependence of spin-orbit interaction (SOI) and g factors on orbital magnetic field in hole semiconductor nanowires (NW). It finds that magnetic fields aligned along the axis of the NW result in a renormalization of the effective g factor up to 400%, even at small values of magnetic field. The paper provides an exact analytical solution for holes in Ge NWs and derives an effective low-energy model to investigate the effect of electric fields applied perpendicular to the NW. The role of strain, growth direction, and high-energy valence bands in different architectures is also discussed in detail.
Article
Materials Science, Multidisciplinary
Junheng Pan, Sheng Liu, Jau Tang
Summary: The study focuses on the ultrafast transport processes of electrons and holes excited by femtosecond laser pulses, shedding light on carrier dynamics in semiconductors. Transient optical techniques and ultrafast scanning electron microscopy are utilized to investigate carrier excitation and transport. The research also elucidates the ballistic dynamics of hot carriers near a p-n junction.
Article
Chemistry, Multidisciplinary
Jingjie Lai, Lijun Ding, Cunhao Fan, Jie Wei, Jing Qian, Kun Wang
Summary: A novel method was developed to prepare surface zinc vacancies in ZnO nanorod arrays, which exhibit high electron-hole separation efficiency and excellent photoelectrochemical performance, making them a promising candidate for the next generation of organic photoelectrochemical transistor aptasensors.
CHEMICAL COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
M. S. Afify, Z. Iqbal, G. Murtza
Summary: The study investigates the formation and characteristics of spin electron acoustic (SEA) soliton in a spin-polarized electron-hole plasma, and finds that increasing beam density and spin polarization can change the soliton nature. These findings may be important for understanding the characteristics of localized spin-dependent nonlinear waves in nanosized semiconductor devices.
Article
Chemistry, Multidisciplinary
Hee-Jung Yeom, Min Young Yoon, Daehan Choi, Youngseok Lee, Jung-Hyung Kim, Shin-Jae You, Hyo-Chang Lee
Summary: In the current and next-generation Si-based semiconductor manufacturing processes, there is a growing interest in using amorphous carbon layer (ACL) hard masks for high-aspect-ratio (HAR) etching. However, the etching characteristics of ACL hard masks under plasma etching conditions have not been extensively studied. This research investigates the role of oxygen in the etching characteristics of ACL hard masks and provides insight into achieving an outstanding etch profile.
Article
Materials Science, Multidisciplinary
Jonas Mielke, Guido Burkard
Summary: Nuclear spins have long coherence times, but isolating them from the environment for controlling nuclear spin qubits is challenging. Strong coupling between an electron spin and microwave resonator photons, as well as microwave resonator mediated coupling between two electron spins, has been reported. Inspired by these findings, we theoretically investigate the interaction of a microwave resonator with a hybrid quantum dot-donor (QDD) system. By driving the QDD system, we can compensate the frequency mismatch and enable effective nuclear spin-photon coupling. Coupling the nuclear spins of two distant QDD systems to the microwave resonator allows the implementation of a resonator-mediated nuclear spin two-qubit iSWAP gate with a gate fidelity approaching 90%.
Article
Physics, Multidisciplinary
Amany Z. Elgarawany, Yosr E. E-D Gamal, Samy A. El-Hafeez, Waleed M. Moslem
Summary: This study examines the interaction between electron-hole plasma and a laser beam and its effect on system stability. An evolution equation and an energy equation are derived to describe the process.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Christoph Adelsberger, Monica Benito, Stefano Bosco, Jelena Klinovaja, Daniel Loss
Summary: Hole-spin qubits in quasi-one-dimensional structures in Ge semiconductors are investigated for their potential in quantum information processing. The study focuses on optimizing the strong spin-orbit interaction (SOI) and explores the effects of electric and magnetic fields on one-dimensional hole systems. The results show that orbital effects significantly renormalize the g factor and there exists a sweet spot in the nanowire structure where charge noise is strongly suppressed, leading to highly coherent qubits with large Rabi frequencies.
Article
Nanoscience & Nanotechnology
Guoen Weng, Jiao Tian, Shengjie Chen, Jiyu Yan, Hanbing Zhang, Yuejun Liu, Chunhu Zhao, Xiaobo Hu, Xianjia Luo, Jiahua Tao, Shaoqiang Chen, Ziqiang Zhu, Junhao Chu, Hidefumi Akiyama
Summary: The research systematically investigates the temporal lasing dynamics of CsPbClmBr3-m microplate lasers for the first time, revealing redshift in gain profile with increasing pump fluence and blueshifts and redshifts in individual lasing modes, reflecting the bandgap renormalization effect and carrier-induced refractive index change. Furthermore, the wavelength-dependent lasing duration demonstrates the dependence of lasing on carrier density and bandgap variation with carrier density. The study provides a comprehensive understanding of the EHP lasing mechanism and carrier dynamics in WGM LHP micro/nanolasers while showcasing the potential for technological advancements in integrated photonics.
Article
Optics
Jian Wang, Xiaohao Jia, Yalu Guan, Kuankuan Ren, Haichao Yu, Zhijie Wang, Shengchun Qu, Qingxin Yang, Jie Lin, Zhanguo Wang, Peng Jin
Summary: This study compared plasmonic lasers and photonic counterparts based on CH3NH3PbBr3 perovskite nanowires, and found that they have the same gain origination. The results show that an electron-hole plasma contributes to both types of lasing actions from perovskite nanowires at room temperature.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Zhenbing Li, Gang Li, Guangjun Wen, Rui Xu, Jian Li, Yongjun Huang, Haoyang Sun, Peiqi Wu, Daniele Inserra, Fuzhen Xie
Summary: This paper proposes an intermittent magnetic field monitoring system based on passive UHF RFID technology, which can monitor magnetic fields in a low-cost and efficient manner, especially suitable for simultaneous monitoring of multiple points.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Daniele Inserra, Zhao Yang, Fading Zhao, Yongjun Huang, Jian Li, Guangjun Wen
Summary: This study discusses the design of discrete apertures (DAs) for wireless power transfer (WPT) within the Fresnel region and provides design guidelines to enhance WPT efficiency. The impact of antenna array design choices on WPT efficiency, such as the number of antenna elements and their spacings, is investigated. The study finds that arrays with interelement spacing in the order of 0.3 lambda-0.4 lambda (tightly coupled arrays) achieve the highest power transfer efficiency (PTE), especially when the impedance matching is taken into account.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Optics
Yuedan Zhou, Yifeng Liu, Wenjiao Wang, Dexu Chen, Xueming Wei, Jian Li, Yongjun Huang, Guangjun Wen
Summary: This paper introduces a new type of optomechanical metamaterial based on a planar ELC-type absorbing structure fabricated on a low-loss flexible substrate. The nonlinear coupling mechanism and nonlinear response phenomenon of this metamaterial driven by electromagnetic induced force are analyzed to reveal the coupling phenomenon of electromagnetic field and mechanical field.
Article
Optics
Eugene Tsao, Yijun Xie, Mingming Nie, Shu-Wei Huang
Summary: Kerr microcombs hold great potential for compact and cost-effective frequency comb applications, but their reliability is hindered by thermal effects and the behavior of dissipative Kerr solitons (DKSs). This study introduces a new regime of DKSs termed monostable DKSs (MS-DKSs), which are both deterministic and self-starting, allowing for stable operation with a single soliton.
Article
Optics
Xiaohan Wang, Kunpeng Jia, Mengwen Chen, Shanshan Cheng, Xin Ni, Jian Guo, Yihao Li, Huaying Liu, Liyun Hao, Jian Ning, Gang Zhao, Xinjie Lv, Shu-Wei Huang, Zhenda Xie, Shi-Ning Zhu
Summary: This work explores the feasibility of generating optical frequency combs using a monolithic chi((2)) mini-OPO and applies it to the mid-infrared range. A new geometry called an optical superlattice box resonator is developed for this purpose. Experimental results demonstrate that, through measuring the revival temporal profiles and narrow beat note linewidths at a detectable repetition frequency, this OPO-based comb source exhibits high coherence.
PHOTONICS RESEARCH
(2022)
Article
Physics, Applied
Jian Guo, Kunpeng Jia, Xiaohan Wang, Shu-Wei Huang, Gang Zhao, Zhenda Xie, Shi-ning Zhu
Summary: This Letter presents a narrow-linewidth laser generated via enhanced stimulated Brillouin scattering (SBS) in a monolithic high-Q fiber resonator. The unique cross-polarization pump scheme based on fiber birefringence prevents high-order SBS and ensures single-frequency Brillouin lasing with high intracavity conversion efficiency. A fundamental linewidth of 50 Hz is achieved, and our scheme also allows precise characterization of Brillouin frequency shift and gain bandwidth of some nonlinear materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jian Li, Yuedan Zhou, Fengwei Peng, Dexu Chen, Chengwei Xian, Pengjun Kuang, Liang Ma, Xueming Wei, Yongjun Huang, Guangjun Wen
Summary: This paper presents an Hg-EIT-like metamaterial unit block that combines the high Q-factor feature of an EIT-like metamaterial unit and the large temperature-sensing sensitivity performance of liquid metals to achieve a high FOM, addressing the precision issue of metamaterial temperature sensors.
Article
Optics
Hao Liu, Shu-Wei Huang, Wenting Wang, Jinghui Yang, Mingbin Yu, Dim-Lee Kwong, Pierre Colman, Chee Wei Wong
Summary: Significant progress has been made in the generation of dissipative Kerr solitons in chip-scale nonlinear resonators, offering a wide range of applications. In this study, square pulse formation in the normal dispersion regime is achieved, and its tuning is demonstrated through modulation frequency. Experimental and modeling results confirm the observation of platicon pulses with different widths.
PHOTONICS RESEARCH
(2022)
Article
Computer Science, Interdisciplinary Applications
Jian Li, Wenxian Zheng, Xueming Wei, Yongjun Huang, Guangjun Wen
Summary: This article introduces a new defected ground structure (DGS) for designing high-performance bandpass filters on the substrate integrated waveguide (SIW) platform, achieving single-band and dual-band filter features. The experimental results validate good agreements between simulations and performance, showing potential for wide application in the upcoming 5G communication area.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2022)
News Item
Optics
Jeffrey Moses, Shu-Wei Huang
Summary: Coherent multi-octave mid-infrared waveforms can be generated and manipulated using cascaded intrapulse difference-frequency generation, providing absolute phase control and expanding the techniques available for arbitrary light-wave control.
Article
Optics
Neeraj Prakash, Shu-Wei Huang, Bowen Li
Summary: This paper introduces a novel counterpropagating all-normal dispersion (CANDi) fiber laser and investigates its relative timing jitter (RTJ). The experiment reveals that the dominant factor affecting the RTJ is the pump relative intensity noise (RIN). Solutions to reduce the jitter are discussed.
Article
Physics, Multidisciplinary
Hao Liu, Wenting Wang, Jinghui Yang, Mingbin Yu, Dim-Lee Kwong, Chee Wei Wong
Summary: Dissipative Kerr solitons (DKSs) in microresonators have greatly developed chip-scale ultra-stable microcomb sources and have been widely applied in fundamental physics. Among them, single DKS, double DKS, and soliton crystal can be identified by the optical spectrum. The double DKS state has recently found its application in microwave photonics due to its two-pulse interference nature. However, the traditional method to generate double DKS yields stochastically relative positions, limiting its application versatility. This work demonstrates a method to deterministically generate double DKSs with fixed relative positions in a 97-GHz Si3N4 microresonator, improving the versatility of double-DKS based applications in microwave photonics.
PHYSICAL REVIEW RESEARCH
(2023)
Review
Engineering, Electrical & Electronic
Mingming Nie, Yijun Xie, Bowen Li, Shu-Wei Huang
Summary: This review comprehensively examines the recent progress and performance enhancements of photonic frequency microcombs, which have found applications in various fields.
PROGRESS IN QUANTUM ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Ji Xia, Qifeng Qiao, Haoyang Sun, Yongjun Huang, Fook Siong Chau, Guangya Zhou
Summary: This paper proposes an integrated optomechanical electrometer for high-precision detection of electric charge using a nanophotonic optomechanical system. By utilizing a suspended photonic crystal nanobeam as a movable mechanical resonator, the optomechanical coupling transduces the mechanical motion to the optical field for enhanced sensitivity. The proposed scheme offers high sensitivity and resolution, making it suitable for ultrasensitive determination of charged nanoparticles in biological and chemical applications.
