Results 61 to 70 of about 20,486 (276)

Toward Wireless Implantable Robotic Systems Driven by Magnetic Field for Personalized Therapy

Advanced Robotics Research, EarlyView.
Robotic materials are playing an increasingly vital role in enabling sensing and actuation at small scales. This perspective highlights recent advances in magnetic materials and magnetically actuated devices for wireless sensing, actuation, and energy harvesting toward implantable robotic systems for closed‐loop therapy.
Yusheng Wang, Ruijian Ge, Xiaoguang Dong
wiley   +1 more source

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, EarlyView.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

Photonic chip based optical frequency comb using soliton induced Cherenkov radiation

, 2015
By continuous wave pumping of a dispersion engineered, planar silicon nitride microresonator, continuously circulating, sub-30fs short temporal dissipative solitons are generated, that correspond to pulses of 6 optical cycles and constitute a coherent ...
Brasch, Victor, Geiselmann, Michael, Gorodetsky, Michael L., Herr, Tobias, Kippenberg, Tobias J., Lihachev, Grigoriy, Pfeiffer, Martin H. P.   +6 more
core   +1 more source

VUV frequency combs from below-threshold harmonics [PDF]

, 2009
Recent demonstrations of high-harmonic generation (HHG) at very high repetition frequencies (~100 MHz) may allow for the revolutionary transfer of frequency combs to the vacuum ultraviolet (VUV).
A Marian, A Zaïr, C Gohle, C Lyngå, DC Yost, Dylan C. Yost, ES Shuman, G Sansone, I Hartl, J Peatross, James Hostetter, Jennifer L. Tate, Jun Ye, Kenneth J. Schafer, KJ Schafer, L Xu, M Bellini, M Hentschel, M Lewenstein, M Lewenstein, M Meckel, M Zhu, MB Gaarde, MB Gaarde, Mette B. Gaarde, Ph Balcou, Ph Balcou, PJ Ho, RJ Jones, RTh Zinkstok, S Cavalieri, S Witte, ST Cundiff, T Nubbemeyer, T Udem, Thomas R. Schibli, TR Schibli, X He   +37 more
core   +3 more sources

Spatial‐Wavelength Multiplexing Error‐Controlled Photonic Analog Computing System

Advanced Science, EarlyView.
A novel photonic integrated circuit prototype implementing the concept of general‐purpose analog computing and demonstrate its capability in radio frequency applications. The chip features a multichannel architecture and performs fully optical analog computation with frequency‐domain parallel processing. An FPGA‐based error‐correction algorithm aims to
Tao Zhu, Bowen Zhu, Shicheng Zhang, Keren Li, Xianchen Wu, Yazhi Pi, Jie Yan, Daigao Chen, Bingli Guo, Xi Xiao, Lei Wang, Xiaochuan Xu, Xuwei Xue, Shanguo Huang, Zizheng Cao, Shaohua Yu   +15 more
wiley   +1 more source

Optical frequency combs for optical fiber communications

APL Photonics
Optical frequency combs are analyzed in the context of using them for carrying data in optical fiber communication systems. Combs are analyzed for their data-carrying capacity, i.e., for how much data they can carry, in massively multiplexed systems, and
Leif Katsuo Oxenløwe
doaj   +1 more source

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

Classical and quantum frequency combs for satellite-based clock synchronization

APL Photonics
The next generation of space-based networks for communications, sensing, and navigation will contain optical clocks embedded within satellites. To fully realize the capabilities of such clocks, high-precision clock synchronization across the networks ...
Ronakraj K. Gosalia, Ryan Aguinaldo, Jonathan Green, Holly Leopardi, Peter Brereton, Robert Malaney   +5 more
doaj   +1 more source

Recent Advances, Applications, and Perspectives in Erbium-Doped Fiber Combs

Photonics
Optical frequency combs have emerged as a new generation of metrological tools, driving advancements in various fields such as free-space two-way time–frequency transfer, low-noise microwave source generation, and gas molecule detection.
Pengpeng Yan, Weiming Xu, Heng Hu, Zhenqiang Zhang, Zhaoyang Li, Rong Shu   +5 more
doaj   +1 more source

Carrier-Envelope Offset Stabilized Ultrafast Diode-Pumped Solid-State Lasers

Applied Sciences, 2015
Optical frequency combs have been revolutionizing many research areas and are finding a growing number of real-world applications. While initially dominated by Ti:Sapphire and fiber lasers, optical frequency combs from modelocked diode-pumped solid-state
Stéphane Schilt, Thomas Südmeyer
doaj   +1 more source