Results 81 to 90 of about 3,041,832 (288)

Coherent Beam Combining Using an Internally Sensed Optical Phased Array of Frequency-Offset Phase Locked Lasers

Photonics, 2020
Coherent beam combining can be used to scale optical power and enable mechanism-free beam steering using an optical phased array. Coherently combining multiple free-running lasers in a leader-follower laser configuration is challenging due to the need to
Lyle E. Roberts, Robert L. Ward, Craig Smith, Daniel A. Shaddock   +3 more
doaj   +1 more source

In-Flight Performance Monitoring of TerraSAR-X Active Phased Array Antenna [PDF]

, 2009
TerraSAR-X is a high resolution synthetic aperture radar (SAR) satellite launched in 2007. Its active phased array X-Band antenna hosts 384 transmit/receive modules (TRMs) controlling the beam shape and steering in azimuth and elevation.
Markus Bachmann, Benjamin Brautigam, Bachmann, Markus, Schwerdt, Marco, Bräutigam, Benjamin, Marco Schwerdt   +5 more
core   +1 more source

Programming Nanoscale Reaction Environments via Peptide Localization for Gold Nanoparticle Growth in Liposomal Nanoreactors

Advanced Functional Materials, EarlyView.
The liposome nanoreactor method enables uniform metal nanoparticle synthesis using the interior as a reaction environment. We demonstrate that peptide sequences and lipid compositions act as a functional molecular switch to control reaction environments in liposome nanoreactors.
Yuya Abe, Joseph Fox, Zabeada Aslam, Kevin Critchley, Stephen D. Evans, Mina Okochi, Masayoshi Tanaka   +6 more
wiley   +1 more source

Photonic Integrated Circuits for an Optical Phased Array

Photonics
Optical phased arrays (OPAs) are renowned for their exceptional ability to manipulate and direct light beams, positioning them as an ideal choice for solid-state light detection and ranging (LiDAR) technologies.
Yasha Yi, Dachuan Wu, Venus Kakdarvishi, Bowen Yu, Yating Zhuang, Alireza Khalilian   +5 more
doaj   +1 more source

Integrated phased-array 1×16 photonic switch for WDM optical packet switching application [PDF]

, 2009
Integrated InP/InGaAsP phased-array 1×16 optical switch is fabricated and characterized for broadband WDM optical packet switching. Wavelength-insensitive operation covering the C-band and penalty-free transmission of 40-Gbps signal are ...
Smit, M.K., T. Tanemura, T. de Vries, Soganci, I.M., H. J. S. Dorren, I. M. Soganci, Vries, de, T., Calabretta, N., Dorren, H.J.S., Nakano, Y., N. Calabretta, Y. Nakano, Tanemura, T., Smalbrugge, E., M. K. Smit, K. A. Williams, Williams, K.A., E. Smalbrugge   +17 more
core   +1 more source

Emerging Post‐CMOS Hardware Neurons for Brain‐Inspired Computing: Devices, Circuits, and System Integration

Advanced Functional Materials, EarlyView.
The physical realization of artificial neurons is a critical challenge for energy‐efficient neuromorphic computing. This review presents a comprehensive analysis of the evolution of artificial neuron implementations from conventional CMOS to emerging post‐CMOS technologies.
Kannan Udaya Mohanan, Hocheon Yoo, Benoît H. Lessard, Ioannis Kymissis, Chang‐Hyun Kim   +4 more
wiley   +1 more source

Bio‐Inspired Artificial Ionic Mechanoreceptor

Advanced Functional Materials, EarlyView.
A skin‐inspired artificial mechanoreceptor based on ionic interactions is presented for biomimetic tactile sensing. Pressure‐driven ionic redistribution within microfluidic channels generates a self‐powered electrical signal without external bias. The generated waveform exhibits mechanoreceptor‐like temporal features, including overshoot and undershoot,
Mohammad Akbari, Jeppe Don, Lasse A. N. Pedersen, John Noee, Rassoul Tabassian   +4 more
wiley   +1 more source

Preferential Interfacial Engineering of Hydrogels via Interdigitated Nanoparticle Assembly

Advanced Functional Materials, EarlyView.
Robust surface functionalization of hydrogel surfaces is performed via interdigitated metal nanoparticle assembly, inducing strong affinity with the hydrogel matrix. The partially exposed nanoparticle domains act as interfacial nanobridges that mediate both chemical and physical bonding with diverse materials, including small molecules, fluorous ...
Hyeonjin Kim, Hyeseoung Lim, Ji Min Lee, Heeyeon Kang, Yongkwon Song, Woojae Chang, So‐Jin Park, Jin Yoo, Atsushi Hozumi, Jinhan Cho, Jongkuk Ko, Sanghyuk Wooh   +11 more
wiley   +1 more source

Implantable silicon neural probes with nanophotonic phased arrays for single-lobe beam steering

Communications Engineering
In brain activity mapping with optogenetics, patterned illumination is crucial for targeted neural stimulation. However, due to optical scattering in brain tissue, light-emitting implants are needed to bring patterned illumination to deep brain regions ...
Fu-Der Chen, Ankita Sharma, Tianyuan Xue, Youngho Jung, Alperen Govdeli, Jason C. C. Mak, Homeira Moradi Chameh, Mandana Movahed, Michael G. K. Brunk, Xianshu Luo, Hongyao Chua, Patrick Guo-Qiang Lo, Taufik A. Valiante, Wesley D. Sacher, Joyce K. S. Poon   +14 more
doaj   +1 more source

GESTRA - upgrading to future distributed phased array radar networks for space surveillance

, 2023
2734More and more objects are orbiting the Earth. Especially mega-constellations lead to a big number of artificial objects in space, both active and debris. This increasing amount of space debris is becoming more and more dangerous for human spaceflight.
Reising, Christoph, Hoffmann, Rudolf, Schneider, Stephan, Horstmann, Steven, Gilles, Markus   +4 more
core   +1 more source