Results 61 to 70 of about 2,620,500 (282)

Sidelobe-free beam-steering using optical phased arrays for neural probes

, 2021
We demonstrate implantable neural probes with integrated silicon nitride optical phased arrays (OPAs) fabricated on 200mm wafers for wavelengths near 480nm.
Mak, J., Luo, X., Lo, P., Poon, J. ; https://orcid.org/, Sacher, W., Chen, F., Jung, Y., Xue, T., Roukes, M.   +8 more
core   +1 more source

Elastic–Plastic Modeling and Experimental Characterization of Granular Jamming Actuators

Advanced Engineering Materials, EarlyView.
Granular jamming enables rapid switching between soft and rigid mechanical states. Here, a reduced‐order elastic‐perfectly‐plastic beam framework captures pressure‐dependent loading, unloading, residual deformation, and hysteresis in jammed beams, while matching three‐point bending experiments across materials and geometries. The framework links design
Saheli Patel, Prashant K. Purohit, Jordan R. Raney   +2 more
wiley   +1 more source

Impact of Hydrogen Incorporation on Electronic and Magnetic Structure of X2CrNi18‐9 Stainless Steel

Advanced Engineering Materials, EarlyView.
Hydrogen uptake in austenitic stainless steel alters both its electronic and magnetic structure. Seebeck measurements reveal hydrogen‐induced shifts in the electronic density of states, while neutron scattering uncovers nanoscale inhomogeneities that grow upon hydrogen incorporation, with the most pronounced effect observed in the PBF as‐built state ...
Torben Tappe, Louis Becker, Gaurav Kanu, Thomas F. Headen, Dirk Honecker, Gabi Schierning, Santiago Benito, Sebastian Weber, Klara Lünser, Sabrina Disch   +9 more
wiley   +1 more source

Chip-to-chip optical wireless link feasibility using optical phased arrays on silicon-on-insulator [PDF]

, 2010
One- and two-dimensional integrated optical phased arrays (OPAs) on silicon-on-insulator have been fabricated and measured having directivities of more than 40dBi and steering ranges up to 10 degrees .
Baets, Roel, Van Acoleyen, Karel, Karel Van Acoleyen, Rogier, Hendrik, Hendrik Rogier, Roel Baets   +5 more
core   +1 more source

Fast beam steering and agile wavefront control with an optical phased array [PDF]

, 2020
Optical phased arrays (OPAs) are a solid-state device able to manipulate the distribution of optical power without the use of mechanical beam steering systems and have potential applications in free-space laser communications, target acquisition and ...
Gozzard, David, Roberts, Lyle, Spollard, James, Sibley, Paul, McClelland, David, Shaddock, Daniel   +5 more
core   +1 more source

An efficient compact blazed grating antenna for optical phased arrays

JPhys Photonics
Phased arrays are vital in communication systems and have received significant interest in the field of optoelectronics and photonics, enabling a wide range of applications such as LiDAR, holography, and wireless communication. In this work, we present a
Henna Farheen, Suraj Joshi, J Christoph Scheytt, Viktor Myroshnychenko, Jens Förstner   +4 more
doaj   +1 more source

Broadband Operation of an InP Optical Phased Array

IEEE Photonics Technology Letters, 2022
We demonstrate the broadband operation and beam calibration over 70nm tuning range of an optical phased array (OPA) fabricated in a generic InP photonic integration platform, which enables multi-wavelength OPA operation. The broadband performance was demonstrated on an 8-channel OPA, whose calibration and phase modulator characterization were executed ...
M. Gagino, M. B. J. van Rijn, E. A. J. M. Bente, M. K. Smit, V. Dolores-Calzadilla   +4 more
openaire   +2 more sources

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

Advanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner, Dhananjeya Kumaar, Giacomo Torti, Killian Keller, Till Zellweger, Florian M. Schenk, Christoph Weilenmann, Daniel Chelladurai, Vara Prasad Jonnalagadda, Ghazi Sarwat Syed, Vanessa Wood, Jürg Leuthold, Alexandros Emboras, Maksym Yarema, Mathieu Luisier   +14 more
wiley   +1 more source

Large-Scale Integrated Multi-Lines Optical Phased Array Chip

IEEE Photonics Journal, 2020
We design and integrate four optical phased arrays (OPAs) in a single chip. Each OPA possesses different output grating period. Furthermore, we use optical switches to select one or more OPAs for beam scanning. We demonstrate the longitudinal scanning by
Lan-Xuan Zhang, Ying-Zhi Li, Min Tao, Yu-Bing Wang, Yu Hou, Bo-Song Chen, Yu-Xuan Li, Li Qin, Feng-Li Gao, Xian-Shu Luo, Guo-Qiang Lo, Jun-Feng Song   +11 more
doaj   +1 more source

High-performance optical beam steering with nanophotonics

Nanophotonics, 2022
The ability to control and steer optical beams is critical for emerging technologies. Among these are light detection and ranging (LiDAR), laser display, free space communication, and single pixel imaging.
Lin Sam, Chen Yixin, Wong Zi Jing
doaj   +1 more source