Article
Optics
D. Main, T. M. Hird, S. Gao, I. A. Walmsley, P. M. Ledingham
Summary: This study demonstrates coherent storage and retrieval of pulsed light using the atomic frequency comb protocol in room temperature alkali vapor. Multiple velocity classes in the ground state of cesium are prepared using velocity-selective optical pumping. Utilizing two transitions in the comb enhances recall efficiency through an interference effect upon rephasing.
Article
Optics
M. Jaidl, N. Opacak, M. A. Kainz, S. Schoenhuber, D. Theiner, B. Limbacher, M. Beiser, M. Giparakis, A. M. Andrews, G. Strasser, B. Schwarz, J. Darmo, K. Unterrainer
Summary: Ring resonators are an interesting alternative cavity solution for THz quantum cascade lasers, exhibiting different emission regimes depending on the presence of defects in the cavity. The results show complex behavior and highlight the strong confinement and optical nonlinearities effects in these devices, leading to the generation of harmonic states and fundamental comb over a wide bandwidth.
Article
Engineering, Electrical & Electronic
Xuehe Hou, Fangrong Hu, Longhui Zhang, Mingzhu Jiang, Lizhen Zeng, Yingchang Zou, Dongxia Li, Shangjun Lin, Wentao Liu, Zhongliang Hu
Summary: By adjusting the position of absorption peaks, a cancer biomarker ultrasensitive detection method based on THz frequency-comb-like is proposed and tested at a concentration of 0.1 pg/mL, achieving higher sensitivity and lower detection limit. This method is valuable for trace molecule detection, biomedical sensing, and early-stage cancer diagnosis.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Applied
M. Jaidl, N. Opacak, M. A. Kainz, D. Theiner, B. Limbacher, M. Beiser, M. Giparakis, A. M. Andrews, G. Strasser, B. Schwarz, J. Darmo, K. Unterrainer
Summary: This paper demonstrates terahertz quantum cascade lasers realized in ideal ring resonators without discontinuities, achieved by mounting the rings upside down on a silicon substrate using a die-bonding technique. The lasers emit light around 3.8 THz, show reduced threshold current densities, and exhibit frequency comb formation.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Zuomin Yang, Lu Zhang, Zijie Lu, Hongqi Zhang, Shiwei Wang, Le Zhang, Xianbin Yu
Summary: In this paper, a photonic terahertz continuous-wave vector imaging scheme using an optical frequency comb is proposed and experimentally demonstrated. The proposed scheme overcomes the influence of phase noise and frequency fluctuation on extracting stable imaging information, and achieves high imaging accuracy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Sutapa Ghosh, Gadi Eisenstein
Summary: Dual comb spectroscopy (DCS) is a broadband technique that offers high resolution and fast data acquisition. Current designs are based on fiber or solid-state lasers, which require complicated stabilization setups. This work describes a hybrid dual-comb spectrometer that combines a broadband fiber laser and a mode-locked semiconductor laser. The mutual coherence time of 100 seconds has been achieved by injection locking the semiconductor laser to a continuous laser.
Article
Instruments & Instrumentation
Hui Fu, Xingle Jiang, Jingrui Wu, Liang Qiu, Yinghao Yuan, Xuguang Guo, Yiming Zhu
Summary: In terahertz dual-comb spectroscopies, electrical time delay lines are used to prolong the sampling time for consecutive terahertz pulses, improving frequency resolution. The system operates in both frequency-domain and time-domain modes, allowing for simultaneous acquisition of wideband and narrowband terahertz spectral information.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Qinxi Qiu, Wanli Ma, Jingbo Li, Lin Jiang, Wangchen Mao, Xuehui Lu, Niangjuan Yao, Yi Shi, Zhiming Huang
Summary: In this study, a room temperature THz photodetector utilizing the electromagnetic induced well mechanism with an SOI-based structure was reported. The detector achieved high sensitivity, fast response, and low noise equivalent power, paving the way for the realization of Si-based THz focal plane arrays with wide applications.
Article
Optics
Kebin Tong, Zhenhui Du, Jinyi Li, Liming Yuan
Summary: This paper proposes a method using direct injection current multi-frequency modulation (MFM) on a semiconductor laser to generate optical frequency combs (OFCs). The feasibility of this method was demonstrated through a series of experiments, showing that it is simple, flexible, and cost-effective.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Physics, Applied
Ting Wang, Jiliang Wu, Yuede Yang, Jinlong Xiao, Yongzhen Huang
Summary: This article presents a highly coherent optical frequency comb (OFC) technology based on the spectral broadening of a phase-locked dual-wavelength microcavity laser. By directly modulating the microcavity laser to generate multiple sidebands, the cross-injection locking of the dual modes is achieved, resulting in an improved beat-signal linewidth from 13.5 MHz to less than 100 Hz. Subsequently, 21 flat comb teeth in a +/- 3 dB power variation are achieved by combining a phase modulator. Finally, an OFC with a bandwidth of 16 nm is successfully realized by narrowing the optical pulse and spectral broadening in a commercial nonlinear optical fiber. The repetition rate has a low phase noise of -102 dBc Hz(-1) at 10 kHz offset, demonstrating the generated OFC has a high degree of coherence.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Luigi Consolino, Malik Nafa, Michele De Regis, Francesco Cappelli, Saverio Bartalini, Akio Ito, Masahiro Hitaka, Tatsuo Dougakiuchi, Tadataka Edamura, Paolo De Natale, Kazuue Fujita
Summary: This article presents the ultra-broadband THz emission obtained by intra-cavity mixing of different wavelengths, as well as the characterization and measurement methods of this emission. The new device can operate at low temperatures without the need for expensive liquid helium cooling, offering high stability and frequency accuracy.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Sam Razavian, Mostafa Hosseini, Yash Mehta, Aydin Babakhani
Summary: In this study, a silicon-based THz pulse radiator chip was used to characterize a long-path THz communication channel, resulting in a broadband frequency comb and low-loss frequency windows. The experimental results are significant in terms of atmospheric absorption, channel path loss, and THz wireless links.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Applied
Xu Ge, Yangyi Chen, Yue Cao, Can Li, Tailin Li, Ziquan Li, Long You, Shiheng Liang, Xiaofei Yang, Yue Zhang
Summary: In this study, we numerically investigate the emission of spin wave packets from a moving antiferromagnetic domain wall and propose a method to generate a frequency comb with a sub-THz central frequency and a GHz frequency interval. Our work opens up possibilities for developing tunable frequency band AFM THz devices based on spin-orbit torque.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Kaile Li, Yuanxiang Chen, Yongtao Huang, Yitong Li, Ying Han, Jia Fu, Jianguo Yu
Summary: A novel 0.36 THz photonic-assisted terahertz-wave signal generation scheme utilizing a single phase modulator as optical frequency comb generator has been demonstrated through simulation. The scheme successfully achieved high-frequency stability of desired optical carriers, enabling the performance evaluation of 4 Gbit/s QPSK signal or 2 Gbaud 16 QAM signal under different transmission scenarios with a bit error ratio below the HD-FEC threshold.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Manas Srivastava, Syed Tajammul Ahmad, Ankit Sharma, Prajwal Doddaballapura Lakshmijayasimha, M. Deseada Gutierrez Pascual, Frank Smyth, Prince M. Anandarajah, Aleksandra Kaszubowska-Anandarajah
Summary: The authors demonstrate a monolithically integrated optical frequency comb source based on mutually injection-locked gain-switched lasers. The photonic integrated circuit consists of two single mode slave lasers and a wavelength tunable single mode master laser. The PIC-based implementation offers the advantages of lower complexity, small footprint, and reduced energy consumption.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Review
Pharmacology & Pharmacy
Qi Shang, Yabing Dong, Yun Su, Faith Leslie, Mingjiao Sun, Feihu Wang
Summary: Cancer immunotherapy is a promising therapeutic strategy that reprograms the immune system to eliminate cancer cells. Local scaffold-based delivery systems have shown potential in overcoming the limitations of systemic administration, improving site-specific efficacy, and minimizing systemic toxicity. Future perspectives and challenges for clinical translation and applications of local scaffold-assisted cancer immunotherapy are discussed.
ADVANCED DRUG DELIVERY REVIEWS
(2022)
Article
Environmental Sciences
Jing Dong, Dujuan Dai, Yue Yang, Feihu Wang, Xuejun Li, Jie Yuan, Yuhuan Chen, Yunni Gao, Man Zhang, Xiaofei Gao, Mei Li, Jingxiao Zhang
Summary: This study comprehensively investigated the responses of Ceratophyllum demersum to gradient concentrations of microcystin-LR (MC-LR), revealing its high reduction and accumulation efficiency of MC-LR. It also highlighted the negative effects on C. demersum, such as biomass reduction and changes in microbial community composition, as well as oxidative damage and altered defense strategies. Furthermore, it verified the potential of submerged macrophytes as an eco-friendly strategy for controlling cyanobacterial blooms, while considering the negative effects on the macrophytes themselves.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Caleb F. Anderson, Rami W. Chakroun, Maria E. Grimmett, Christopher J. Domalewski, Feihu Wang, Honggang Cui
Summary: The study explores a method of using collagen-binding peptide to create a biocompatible and sprayable hydrogel, which can rapidly gel and adhere to multiple organ surfaces in wet physiological environments, enabling sustained release of therapeutic drugs.
Editorial Material
Plant Sciences
Feihu Wang, Qian Zeng, Yicong Lv, Xiulan Xu, Shan Han, Hua Yang, Shujiang Li, Tiantian Lin, Hanbo Yang, Yinggao Liu, Chunlin Yang
Article
Chemistry, Multidisciplinary
Feihu Wang, Hao Huang, Karin Yaniv, Ariel Kushmaro, Roy Bernstein
Summary: This study systematically investigates the self-assembly of graphene oxide and reduced graphene oxide on the surface of porous polymers and explores their potential applications for surface modification. The research shows that micropatterned graphene oxide and reduced graphene oxide with adjustable morphologies can be easily obtained on polymeric surfaces, altering the surface properties and giving the polymers various potential applications.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Marine & Freshwater Biology
Jing Dong, Yue Yang, Dujuan Dai, Feihu Wang, Yang Zhang, Yuhuan Chen, Jie Yuan, Conghui Guo, Yunni Gao, Man Zhang, Xiaofei Gao, Xuejun Li
Summary: This study comprehensively investigated the response of submerged Ceratophyllum demersum to exudates and extracts of toxic Microcystis aeruginosa at different growth phases and concentrations. The results showed that the effects on C. demersum varied depending on the growth phase and concentration, and the abundance of beneficial and harmful microorganisms was also affected.
Editorial Material
Plant Sciences
Feihu Wang, Qian Zeng, Chao Liu, Xiulan Xu, Tianhui Zhu, Yinggao Liu, Hanbo Yang, Shan Han, Hua Yang, Shujiang Li, Tiantian Lin, Chunlin Yang
Article
Microbiology
Qian Zeng, Yi-Cong Lv, Xiu-Lan Xu, Yu Deng, Fei-Hu Wang, Si-Yi Liu, Li-Juan Liu, Chun-Lin Yang, Ying-Gao Liu
Summary: In this study, the ascomycetes from bamboo in Sichuan Province, China were surveyed. Seven species were confirmed, including one new genus, two new species, and five new host record species. A comprehensive description and color photo plates of micromorphology were provided.
Editorial Material
Plant Sciences
Feihu Wang, Qian Zeng, Chao Liu, Yijie Zhou, Xiaohang Chen, Feng Liu, Xiulan Xu, Yinggao Liu, Chunlin Yang
Article
Ecology
Jing Dong, Dujuan Dai, Yue Yang, Feihu Wang, Yang Zhang, Man Zhang, Yunni Gao, Xiaofei Gao, Xuejun Li
Summary: Interspecific interactions are crucial in shaping phytoplankton structure and affecting food webs in freshwater ecosystems. Previous studies on the competition between green algae and submerged macrophytes have primarily focused on growth, neglecting the changes in algal morphology. This study demonstrates that submerged macrophyte Egeria densa can allelochemically inhibit the growth of green alga Scenedesmus obliquus, with shading effects becoming important at low algal densities. Additionally, the presence of E. densa induces the formation of small colonies of S. obliquus. The suppression of photosynthesis-related genes may lead to reduced cell division in S. obliquus, and the formation of small colonies is likely a result of inhibitory cell division and promotion of polysaccharide by allelochemicals from E. densa. The findings highlight the importance of considering morphological changes induced by interspecific competition for predicting phytoplankton composition and structure in freshwater ecosystems.
Article
Construction & Building Technology
Feihu Wang, Danying Gao, Zhi Xu, Tao Zhang
Summary: This study compared the axial compressive properties of steel fiber-reinforced recycled-fine-aggregate concrete (SFRFAC) using prism and cylinder specimens. The effects of factors such as RFA replacement ratio, steel fiber volume fraction, steel fiber type, and silica fume content on the compressive properties of SFRFAC were analyzed. The results showed that the prism specimen had smaller compressive strength and peak strain but larger elastic modulus and compression work compared to the cylinder specimen. The addition of RFA, steel fiber, and silica fume had different effects on the compressive properties of SFRFAC.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Computer Science, Information Systems
Yuda Lin, Liang Jin, Kaizhi Huang, Xiaoli Sun, Feihu Wang
Summary: This article considers the effect of pilot leakage on the performance of covert communication in multiantenna systems. It proposes a general analysis model and an optimization framework for multiantenna joint covert communication (JTCC). Numerical results demonstrate the advantages of the JTCC system in resisting pilot detection and explore the tradeoff of pilot design between covertness, reliability, and overall rate performance.
IEEE SYSTEMS JOURNAL
(2023)
Article
Construction & Building Technology
Weihua Ding, Hu Li, Fan Yang, Bin Hou, Haibin Xue, Feihu Wang, Zongxiao Zhang, Xinhong Wang
Summary: In this paper, a single camera and fixed scale compensation method for instantaneous water level observation in unsteady flow is proposed. By placing a series of fixed scales near the water surface and using a single camera to record the water level change process, the water level elevation can be obtained. The accuracy of this method in measuring the dynamic water level is 1-2 mm, meeting the accuracy requirement and greatly reducing the observation cost of the model test.
ADVANCES IN CIVIL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Han Wang, Maya K. Monroe, Feihu Wang, Mingjiao Sun, Charles Flexner, Honggang Cui
Summary: The main challenge in long-acting injectables for HIV treatment is the limited duration of drug release. In this study, researchers designed self-assembling drug amphiphiles based on lamivudine, which can form a supramolecular hydrogel and achieve sustained drug release. In vivo studies demonstrated that the hydrogel maintained effective drug concentrations and showed minimal systemic immunogenicity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Limnology
Dujuan Dai, Yue Yang, Feihu Wang, Man Zhang, Yunni Gao, Jing Dong, Xuejun Li, Jun Lv
Summary: This study evaluated the effects of microcystin-LR (MC-LR) on colony formation of Chlorella vulgaris induced by the submerged macrophyte Potamogetom crispus. The results showed that the growth of C. vulgaris was significantly inhibited under P. crispus stress, but the addition of MC-LR had no significant effects on the growth and morphological changes of C. vulgaris.
INTERNATIONAL JOURNAL OF LIMNOLOGY
(2022)
