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中国科学院新疆理化技术研究所在非线光学响应机理取得突破进展---低能轨道非中心分布机理（Low-energy orbital non-centrosymmetric distribution, LOND）（图）
非线光学 响应机理 低能轨道 非中心分布
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2021/3/1
非线性光学因为它的高阶物理过程而独具魅力，在固体激光，物质探测，光子通信，量子纠缠，量子隐形传输等领域都有广泛应用。1961年科学家们在石英晶体中观测到了激光的二阶非线性过程。随后，非线性光学迎来了飞跃的发展。在非线性光学微观机理研究方面，从化学键、原子尺度上发展了许多理论模型和近似的方法，包括非谐振子模型、双能级模型、键电荷模型、键参数模型、电荷转移理论等，为非线性光学材料的内在机理和设计合成方...
Low frequency signal spectrum analysis for strong earthquakes
VLF/LF signal propagation eartquake precursors
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2015/8/24
We examined changes in the spectral composition of the low frequency (LF) subionospheric signals from the NRK transmitter (37.5 kHz) in Iceland that were received in Bari (Italy) relative to the earth...
HEIGHT TEXTURE OF LOW VEGETATION IN AIRBORNE LASER SCANNER DATA AND ITS POTENTIAL FOR DTM CORRECTION
airborne laser scanning vegetation texture DEM/DTM correction
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2015/8/13
The influence of low vegetation on laser scanning and its disturbing effect (a systematic positive height shift) during DTM generation
is well recognized. Based on our experience in a previous study...
A brighter design emerges for low-cost, 'greener' LED light bulbs（图）
greener LED light bulbs
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2014/12/1
The phase-out of traditional incandescent bulbs in the U.S. and elsewhere, as well as a growing interest in energy efficiency, has given LED lighting a sales boost. However, that trend could be short-...
Design of an optical reference cavity with low thermal noise and flexible thermal expansion properties
optical reference cavity low thermal noise flexible thermal expansion properties Optics
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2012/4/19
An ultrastable optical reference cavity with re-entrant fused silica mirrors and a ULE spacer structure is designed through finite element analysis. The designed cavity has a low thermal noise limit o...
Low-loss amorphous Si waveguides with gradient refractive index cladding structure
Low-loss amorphous waveguides gradient refractive index cladding structure
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2013/7/3
Amorphous Si waveguides with gradient refractive index cladding structure are proposed and fabricated using plasma-enhanced chemical vapor deposition method. Compared with 6 dB/cm for ridge waveguide ...
Low phase noise diode laser oscillator for 1S-2S spectroscopy in atomic hydrogen
Low phase noise diode laser oscillator 1S-2S spectroscopy atomic hydrogen
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2011/8/16
Abstract: We report on a low-noise diode laser oscillator at 972 nm actively stabilized to an ultra-stable vibrationally- and thermally compensated reference cavity. To increase the fraction of laser ...
An Optical Fibre Pulse Rate Multiplier for Ultra-low Phase-noise Signal Generation
Optical Fibre Ultra-low Phase-noise Signal
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2011/9/6
In this letter we report on an all optical-fibre approach to the synthesis of ultra-low noise microwave signals by photodetection of femtosecond laser pulses. We use a cascade of Mach-Zehnder fibre in...
Low-threshold directional plasmon lasing assisted by spatially coherent surface plasmon polaritons
Low-threshold plasmon
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2011/9/2
We theoretically propose directional, low-threshold plasmon lasing in both the near-infrared and visible wavelengths by utilizing spatially coherent surface plasmon polaritons on a meta-surface.The ga...
Least square fitting of low resolution gamma ray spectra with cubic B-spline basis functions
B-spline basis functions least square fitting gamma-ray spectra
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2009/8/14
In this paper, the least square fitting method with the cubic B-spline basis functions is derived to reduce the influence of statistical fluctuations in the gamma ray spectra. The derived procedure is...
A study on real-time low-frequency spatial filtering process of an optical image using LiNbO3:Fe crystal
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2007/7/28
期刊信息
篇名
A study on real-time low-frequency spatial filtering process of an optical image using LiNbO3:Fe crystal
语种
英文
撰写或编译
撰写
作者
Liu Si-Min,Lu Yi,Chen Hai-Dong,Liu Jun-Min,et.al
第一作者单位
刊物名称
ACTA Phy...
Low-Energy Levels Calculation for 193Ir
Ir-193 Beta decay Spectroscopy
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2010/10/13
In this work, a model based on single particle plus pairing residual interaction was used to study the low-lying excited states of the 193Ir nucleus. In this model, the deformation parameters in equil...
Features of Daily Variation in Cosmic Ray Intensity During High/Low Amplitude Events
cosmic ray diurnal semi-diurnal anisotropy high-speed solar wind streams and interplanetary magnetic field
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2010/4/12
A detailed study has been conducted on the long-term changes in the diurnal, semi-diurnal and tri-diurnal anisotropy of cosmic rays in terms of the high/low amplitude anisotropic wave train events (HA...
Influence of Solar Activity on Low Amplitude Cosmic Ray Diurnal Anisotropy
Cosmic ray sunspot solar activity solar cycle and diurnal anisotropy
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2010/4/12
A detailed study has been conducted on the occurrence of a large number of low amplitude events (LAE) of cosmic ray (CR) diurnal anisotropy during 1981--1994 as a function of solar activity. The low a...
Exceptionaly Low Amplitude Anisotropic Wave Train Events in Cosmic Ray Intensity
Cosmic ray diurnal semi-diurnal and anisotropy
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2010/4/12
The unusually low amplitude anisotropic wave train events (LAEs) in cosmic ray intensity using the ground-based Deep River neutron monitor data has been studied during the period 1991--94. It has been...