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Researchers Boost Efficiency And Stability Of Optical Rectennas（图）
Researchers Efficiency And Stability Optical Rectennas
2018/1/26
The research team that announced the first optical rectenna in 2015 is now reporting a two-fold efficiency improvement in the devices — and a switch to air-stable diode materials. The improvements cou...
Prototype Shows How Tiny Photodetectors Can Double Their Efficiency（图）
Prototype Tiny Photodetectors Double Their Efficiency
2017/10/9
Physicists at the University of California, Riverside have developed a photodetector – a device that senses light – by combining two distinct inorganic materials and producing quantum mechanical proce...
Adaptive Transmission of Variable-Rate Data over a Fading Channel for Energy-Efficiency
Adaptive Transmission Variable-Rate Data Fading Channel Energy-Efficiency
2015/8/17
Adapting to a time-varying channel to maximize the average information rate for a given power constraint is a well-understood problem. Important studies (e.g., [I], [Z], [3]) have developed optimal ra...
200 Gb/s and Dual-Wavelength 400 Gb/s Transmission over Transpacific Distance at 6 b/s/Hz Spectral Efficiency
200 Gb/s Dual-Wavelength 400 Gb/s Transmission over Transpacific Distance 6 b/s/Hz Spectral Efficiency
2014/11/6
We transmit 106x200 Gb/s channels over 10,290 km at 6.0 b/s/Hz enabled by Nyquist spectral shaping and nonlinearity compensation. We also transmit 53x400 Gb/s channels over 9,200 km detecting two 200 ...
32-bit/s/Hz Spectral Efficiency WDM Transmission over 177-km Few-Mode Fiber
32-bit/s/Hz Spectral Efficiency WDM Transmission over 177-km Few-Mode Fiber
2014/11/6
We transmit 32 WDM channels over 12 spatial and polarization modes of 177 km few-mode fiber at a record spectral efficiency of 32 bit/s/Hz. The transmitted signals are strongly coupled and recovered u...
Comparison of working efficiency of terrestrial laser scanner in day and night conditions
ITU Civil Engineering Faculty Department of Geomatics Engineering 34469 Maslak Istanbul Turkey
2013/4/22
Terrestrial Laser Scanning is a popular and widely used technique to scan existing objects, document historical sites and items, and remodel them if and when needed. Their ability to collect thousands...
The Efficiency of a p-n Solar Diode as a Function of the Recombination Velocity within the Depletion Layer
Efficiency Diffusion Equation Recombination Velocity
2012/12/28
The role of the carrier’s recombination velocity Si within the depletion Layer of p-n junction solar cell and the external bias voltage Va across the junction in determining the current density “J” th...
Enhancement in Light Extraction Efficiency of GaN-Based Light-Emitting Diodes Using Double Dielectric Surface Passivation
GaN Light-Emitting Diode (LED) Al2O3 PEALD Passivation Double Dielectric Stack Layer
2012/9/28
SiO2Al2O3 double dielectric stack layer was deposited on the surface of the GaN-based light-emitting diode (LED). The double dielectric stack layer enhances both the electrical characteristics and the...
Applications of Microtube Array on Transflective Liquid Crystal Displays for Backlight Efficiency Enhancement
transflective LCD microtube array backlight efficiency enhancement
2011/12/13
A novel transflective liquid crystal display (LCD) with a microtube array structure to make the most effective use of backlight was demonstrated. By redefining the area ratio of transmissive and refle...
Liquid crystal panel for high efficiency barrier type autostereoscopic three-dimensional displays
2011/12/13
An autostereoscopic display with parallax barrier attached onto a liquid crystal panel suffers from the trade-off between brightness and crosstalk. One approach for making improvement by modifying the...
High-Efficiency Polarized Light Illumination System for Liquid-Crystal-Display Projectors
liquid crystal display illumination system projector polarization conversion shape conversion offset design
2011/11/30
We present a new optical system with two identical s- and p-polarized light paths for converting a random polarized beam into a linearly polarized one. The system also provides a uniform and rectangul...
High-efficiency micro-optical color filter for liquid-crystal projector system applications
2011/11/30
High-efficiency color filters composed of a microprism array, optical interference color filters, and a microlens array light compressor were developed to increase the optical throughput of liquid-cry...
Applications of Microtube Array on Transflective Liquid Crystal Displays for Backlight Efficiency Enhancement
transflective LCD microtube array backlight efficiency enhancement
2011/11/25
A novel transflective liquid crystal display (LCD) with a microtube array structure to make the most effective use of backlight was demonstrated. By redefining the area ratio of transmissive and refle...
Increased Organic Light-Emitting Diode Panel Light Efficiency by Optimizing Structure and Improving Alignment of Pyramidal Array Light-Enhancing Layers
organic light-emitting diode (OLED) array light-enhancing layer light efficiency alignment Moire?pattern
2011/11/24
A pyramidal array light-enhancing layer (pyramidal ALEL) on an organic light emitting diode (OLED) panel has been optimized to enhance the luminance efficiency with a gain factor of 2.03 experimentall...
A CITYGML 3D GEODATABASE FOR BUILDINGS' ENERGY EFFICIENCY
Building Energy Efficiency Energy Balance CityGML 3D Data Model OGC Standard Multi-Scale Approach
2011/8/31
This paper illustrates the results of a research focused on the development of a multi-scale geodatabase designed to store the data needed to measure the energy buildings performance of buildings to b...