Results 81 to 90 of about 67,113 (245)

Retrodirective optical system [PDF]

open access: yes, 1969
Fabry-Perot interferometer retrodirective reflector modulator for optical ...
Minott, P. O.
core   +1 more source

Visible‐Light Photoprogrammable Transistors Enabled by an All‐Organic Triplet‐Sensitized Diarylethene Channel Layer

open access: yesAdvanced Optical Materials, EarlyView.
All‐organic channel‐layer OFETs are shown to enable visible‐light photoprogramming via triplet‐sensitized diarylethene switching. Preferential localization of the photoswitch and organic sensitizer in intercrystalline amorphous domains preserves polymer crystalline packing while ensuring short‐range Dexter‐type triplet–triplet energy transfer and solid‐
Jieun Kwon   +10 more
wiley   +1 more source

Laser Communications for Satellite-Terrestrial Integration: Research Status, Key Technologies, and Future Prospects

open access: yes天地一体化信息网络
Satellite laser communication uses laser with shorter wavelength as the information carrier for data transmission, which can achieve a higher data transmission rate than RF communication.
YUAN Renzhi   +6 more
doaj  

Experimental Evidence of Free Carrier Generation in 2D Hybrid Organic–Inorganic Perovskites

open access: yesAdvanced Optical Materials, EarlyView.
ABSTRACT Despite the significant potential of 2D hybrid organic–inorganic perovskites (2DHOIPs) for high‐efficiency optoelectronics application‐comparable to their 3D counterparts, the fundamental carrier photogeneration remains unclear. In contrast to conventional ultrafast optical property characterization, we use ultrafast photocurrent spectroscopy ...
Tuhin Ghosh   +8 more
wiley   +1 more source

Ultra‐Flexible Dual‐Band Organic Photodetectors for Visible and Near‐Infrared Sensing

open access: yesAdvanced Optical Materials, EarlyView.
An ultra‐flexible dual‐band organic photodetector with a total thickness of 5.6 µm for bio‐sensing is developed. It selectively detects visible and near‐infrared light with high sensitivity by switching the voltage. Peripheral oxygen saturation (SpO2) measurement is demonstrated using the device attached to a finger under a single light source by ...
Sachi Awakura   +6 more
wiley   +1 more source

Simulation Method for the Impact of Atmospheric Wind Speed on Optical Signals in Satellite–Ground Laser Communication Links

open access: yesPhotonics
To analyze the intensity of atmospheric turbulence in a satellite–ground laser communication link, it is important to consider the effect of increased atmospheric turbulence caused by wind speed.
Wujisiguleng Zhao, Chunyi Chen
doaj   +1 more source

Effects of atmospheric turbulence on fiber-coupled DPSK system in Satellite-to-Ground downlink

open access: yesResults in Physics, 2018
Fiber-coupled differential phase-shift keying (DPSK) modulation is potentially an effective approach for further high-speed satellite lasercom, due to the high detection sensitivity, low linewidth requirements, and uncalled-for complex phase-locked loop ...
Qingbo Yang   +6 more
doaj   +1 more source

On the orbit of the LARES satellite [PDF]

open access: yes, 2006
This paper is motivated by the recent possibility to find an inexpensive launching vehicle for the LARES satellite, however at an altitude much lower than originally planned for the LAGEOS III/LARES satellite.
Ciufolini, Ignazio
core   +2 more sources

Quantum Communication Technology

open access: yes, 2010
Quantum communication is built on a set of disruptive concepts and technologies. It is driven by fascinating physics and by promising applications. It requires a new mix of competencies, from telecom engineering to theoretical physics, from theoretical ...
Gisin, Nicolas, Thew, Rob
core   +3 more sources

Unraveling Mechanism of Photoluminescence in Hybrid Indium Halide Materials

open access: yesAdvanced Optical Materials, EarlyView.
Halide substitution in isolated [InHal6]3− octahedra reveals how bromide incorporation governs photoluminescence properties in hybrid indium halides. Ligand‐to‐metal charge transfer excitation followed by recombination produces a red‐shift and steadily increasing photoluminescence efficiency with increasing Br content.
Aleksandra D. Valueva   +2 more
wiley   +1 more source

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