搜索结果: 1-15 共查到“光电子技术 thermal”相关记录18条 . 查询时间(0.16 秒)
WATER LEAKAGE DIAGNOSIS IN METRO TUNNELS BY INTERGRATION OF LASER POINT CLOUD AND INFRARED THERMAL IMAGING
Tunnel Infrared Thermal Imaging Laser Scanning Intensity Data Water Leakage Diagnosis
2018/5/16
Diagnosis of water leakage in metro tunnels is of great significance to the metro tunnel construction and the safety of metro operation. A method that integrates laser scanning and infrared thermal im...
Consideration of enhancement of thermal rectification using metamaterial models
Heat transfer Near-field Metamaterials Radiative Thermal rectification
2015/8/6
We present a systematic study to highlight some of the fundamental physics that governs metamaterial based electromagnetic thermal rectifiers. In such thermal rectifiers, the rectification arises from...
Enhancing far-field thermal emission with thermal extraction
Enhancing thermal emission thermal extraction
2015/8/7
The control of thermal radiation is of great current importance for applications such as energy conversions and radiative cooling. Here we show theoretically that the thermal emission of a finit...
Three-dimensional self-assembled photonic crystals with high temperature stability for thermal emission modification
Three-dimensional self-assembled photonic crystals temperature stability thermal emission modifi cation
2015/8/7
Selective thermal emission in a useful range of energies from a material operating at high temperatures is required for effective solar thermophotovoltaic energy conversion.Three-dimensional metallic ...
Negative differential thermal conductance through vacuum
Negative differential thermal conductance through vacuum
2015/8/7
We propose a scheme for achieving negative differential thermal conductance in near-field electromagnetic thermal transfer. As an example, we show that the scheme can be implemented with two sla...
Reduction of hybrid silicon laser thermal impedance using Poly Si thermal shunts
Optoelectronics Lasers and laser optics Optical devices
2015/5/26
We present a hybrid silicon evanescent laser that uses poly-silicon thermal shunts to reduce the device thermal impedance from 41.5 to 33.5 deg. C/W.
We propose a mechanism for photon mediated thermal rectification through vacuum relying only on the temperature dependence of electromagnetic resonances. We also propose an example implementatio...
Exponential suppression of thermal conductance using coherent transport and heterostructures
Exponential suppression thermal conductance coherent transport heterostructures
2015/8/10
We consider coherent thermal conductance through multilayer photonic crystal heterostructures, consisting of a series of cascaded nonidentical photonic crystals. We show that thermal conductance can b...
Novel Thermal Drift Suppression Method in Channel Switching of Mode-hop-free Tunable Laser Array
Semiconductor Lasers Lasers tunable
2015/6/10
A switching time of less than 40 μs has been achieved for a TDA-DFB laser array with a thermal drift suppression technique using the tuning regions of non-lasing lasers as heaters for temperature comp...
Low Loss Chalcogenide Glass Waveguides Fabricated By Thermal Nanoimprint Lithography
Glass waveguides Nonlinear optics integrated optics
2015/6/5
Low loss thermally nanoimprinted chalcogenide waveguides are demonstrated for the first time,uniquely using a soft PDMS stamp. Losses of 0.24dB/cm at 1550nm limited by Rayleigh scattering were achieve...
Universal features of coherent photonic thermal conductance in multilayer photonic band gap structures
Universal features photonic thermal conductance multilayer photonic band gap structures
2015/8/10
We show that at the high-temperature limit, the coherent photonic thermal conductance of a multilayer photonic crystal can be significantly below the corresponding thermal conductance of vacuum....
Thermal Diffusivity Measurements of Metals and Alloys by Making Use of the Phase Shift of Laser-Induced Thermoelastic Wave
Thermal diffusivity measurement Thermo elastic wave CO2 laser
2009/6/8
This paper describes a method of obtaining the thermal diffusivity of a metal sample of known thickness. By irradiating an intensity-modulated laser beam of 8 W to the sample at power density of 1.5 ×...
Novel Model of Thermal Conductivity for Optical Materials
Laser materials Thermal conductivity Thermal diffusivity
2009/6/1
We have proposed a novel model of thermal conductivity in various optical materials. This numerical model for thermal conductivity requires one material parameter for isovolumic specific heat and two ...
A Proposed Method for Thermal Specific Bioimaging and Therapy Technique for Diagnosis and Treatment of Malignant Tumors by Using Magnetic Nanoparticles
Thermal Specific Bioimaging Therapy Technique Malignant Tumors Magnetic Nanoparticles
2009/5/19
The objective of this research program is to develop a novel, noninvasive, low-cost infrared (8–12 μm spectral range) imaging technique that would improve upon current methods using nanostructur...
Tuning coherent radiative thermal conductance in multilayer photonic crystals
Tuning coherent radiative thermal conductance multilayer photonic crystals
2015/8/10
We consider coherent radiative thermal conductance of a multilayer photonic crystal. The crystal consists of alternating layers of lossless dielectric slabs and vacuum, where heat is conducted only th...