Results 141 to 150 of about 2,848,759 (416)

Harnessing optical micro-combs for microwave photonics

open access: yes, 2018
In the past decade, optical frequency combs generated by high-Q micro-resonators, or micro-combs, which feature compact device footprints, high energy efficiency, and high-repetition-rates in broad optical bandwidths, have led to a revolution in a wide ...
Chu, Sai Tak   +8 more
core   +1 more source

Tin‐Based 2D/3D Perovskite Vertical Heterojunction for High‐Performance Synaptic Phototransistors

open access: yesAdvanced Functional Materials, EarlyView.
Phototransistors based on tin‐based 2D/3D perovskite heterostructures show an ultrahigh responsivity and detectivity at a low gate voltage across a broad wavelength region from ultraviolet to near‐infrared. The devices can replicate neuromorphic learning and remembering behaviors to light stimuli, in addition to electric depression and memory erasure ...
Hok‐Leung Loi   +10 more
wiley   +1 more source

Analysis of Mini-Camera's Cat-Eye Retro-Reflection for Characterization of Diffraction Rings and Arrayed Spots

open access: yesIEEE Photonics Journal, 2019
Mini-cameras are one of several emerging types of cat-eye devices using small lenses with insufficient retro-reflection for traditional detection systems to identify.
Chun Liu   +5 more
doaj   +1 more source

On the physical nature of the photon mixing processes in nonlinear optics [PDF]

open access: yesarXiv, 2001
The physical nature of the photon mixing and photon echo processes is discussed on the basis of inequality of the forward and backward optical transitions.
arxiv  

The Boston University Photonics Center annual report 2016-2017 [PDF]

open access: yes, 2017
This repository item contains an annual report that summarizes activities of the Boston University Photonics Center in the 2016-2017 academic year. The report provides quantitative and descriptive information regarding photonics programs in education ...
The Boston University Photonics Center
core  

Near‐Field Phonon Nanoscopy and Imaging of Structural Variants in Mixed Phase BiFeO3

open access: yesAdvanced Functional Materials, EarlyView.
Nano‐Fourier transform infrared spectroscopy and scattering scanning near‐field optical microscopy imaging reveal the phonon response of nanoscale phase variants in mixed‐phase BiFeO3 (BFO). Direct mid‐infrared imaging of associated distinct vibrational signatures is used as a non‐invasive optical detection method for electrical switching of ...
Dawei Zhang   +8 more
wiley   +1 more source

Tree-CNN: from generalization to specialization

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
Traditional convolutional neural networks (CNNs) classify all categories by a single network, which passes all kinds of samples through totally the same network flow.
Shenwang Jiang   +3 more
doaj   +1 more source

Quantum Optics and Photonics [PDF]

open access: yes, 1984
Contains reports on seven research projects.U.S. Air Force Geophysics Laboratory (Contract F19628-70-C-0082)Joint Services Electronics Program (Contract DAAG29-83-K-0003)National Science Foundation (Grant PHY82-10369)U.S. Air Force - Rome Air Development
DiFillipo, David   +10 more
core  

Label-free Optical Biosensing on a single chip. [PDF]

open access: yes, 2008
Combining semiconductor technology with photonics, optics, and biochemistry leads to sensors with improved biomedical diagnostic ...
Casquel del Campo, Rafael   +2 more
core   +2 more sources

All‐Cellulose‐Based Photonic Glitters

open access: yesAdvanced Functional Materials, EarlyView.
Uniform, disc‐shaped photonic CNC glitters with adjustable structural colors and diameters are fabricated on hydrophilic ethyl cellulose films using electrospray deposition. By employing patterned ethyl cellulose films with pre‐designed hydrophilic regions, photonic patterns can be created with these all‐cellulose‐based glitters, demonstrating their ...
Ting Wang   +5 more
wiley   +1 more source

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