Are absorption and spontaneous or stimulated emission inverse processes? The answer is subtle! [0.03%]
吸收与自发辐射或受激辐射是不是逆过程？答案微妙！
Markus Pollnau
Markus Pollnau
It is generally believed that absorption and stimulated emission are inverse processes, as both are driven by an external field, their strength is quantified by the same Einstein B coefficient, and they occur with a defined phase, opposite ...
Optical remote sensing for monitoring flying mosquitoes, gender identification and discussion on species identification [0.03%]
光学遥感在监测飞行蚊虫、性别识别及物种识别中的应用与讨论
Adrien P Genoud,Roman Basistyy,Gregory M Williams et al.
Adrien P Genoud et al.
Mosquito-borne diseases are a major challenge for Human health as they affect nearly 700 million people every year and result in over 1 million deaths. Reliable information on the evolution of population and spatial distribution of key inse...
Jonas Rodewald,Philipp Haslinger,Nadine Dörre et al.
Jonas Rodewald et al.
We present matter-wave interferometry as a tool to advance spectroscopy for a wide class of nanoparticles, clusters and molecules. The high sensitivity of de Broglie interference fringes to external perturbations enables measurements in the...
Pulsed Rydberg four-wave mixing with motion-induced dephasing in a thermal vapor [0.03%]
热蒸气中运动引起的相位弛豫的脉冲Rydberg四波混频效应
Yi-Hsin Chen,Fabian Ripka,Robert Löw et al.
Yi-Hsin Chen et al.
We report on time-resolved pulsed four-wave mixing (FWM) signals in a thermal Rubidium vapor involving a Rydberg state. We observe FWM signals with dephasing times up to 7 ns, strongly dependent on the excitation bandwidth to the Rydberg st...
Autonomous field measurements of CO2 in the atmospheric column with the miniaturized laser heterodyne radiometer (Mini-LHR) [0.03%]
采用微型激光外差辐射计（Mini-LHR）进行大气柱CO2的自主现场测量
H R Melroy,E L Wilson,G B Clarke et al.
H R Melroy et al.
We present column CO2 measurements taken by the passive miniaturized laser heterodyne radiometer (Mini-LHR) at 1611.51 nm at the Mauna Loa Observatory in Hawaii. The Mini-LHR was operated autonomously, during the month of May 2013 at this s...
E Sorokin,D Klimentov,M P Frolov et al.
E Sorokin et al.
We report spectroscopic characteristics and laser properties of the mid-infrared active laser medium Cr2+:CdS. Temperature-dependent absorption, luminescence and lifetime measurements of the 5E exited state allow determination of peak emiss...
Time-resolved digital holographic microscopy of laser-induced forward transfer process [0.03%]
激光诱导向前转移过程的时域数字全息显微技术
H Ma,V Venugopalan
H Ma
We develop a method for time-resolved digital holographic microscopy to obtain time-resolved 3-D deformation measurements of laser induced forward transfer (LIFT) processes. We demonstrate nanometer axial resolution and nanosecond temporal ...
Addressable, large-field second harmonic generation microscopy based on 2D acousto-optical deflector and spatial light modulator [0.03%]
基于二维声光偏转器和空间光调制器的可寻址大视场二次谐波产生显微镜
Yonghong Shao,Honghai Liu,Wan Qin et al.
Yonghong Shao et al.
We present an addressable, large-field second harmonic generation microscope by combining a 2D acousto-optical deflector with a spatial light modulator. The SLM shapes an incoming mode-locked, near-infrared Ti:Sapphire laser beam into a mul...
Continuous-Wave Stimulated Raman Scattering (cwSRS) Microscopy [0.03%]
连续波受激拉曼散射显微镜(CW-SRS microscopy)
Zhaokai Meng,Georgi I Petrov,Vladislav V Yakovlev
Zhaokai Meng
Stimulated Raman scattering (SRS) microscopy is a powerful tool for chemically-sensitive non-invasive optical imaging. However, ultrafast laser sources, which are currently employed, are still expensive and require substantial maintenance t...
Y Shao,W Qin,H Liu et al.
Y Shao et al.
We present a new multifocal multiphoton microscope that employs a programmable spatial light modulator to generate dynamic multifocus arrays which can be rapidly scanned by changing the incident angle of the laser beam using a pair of galvo...