Results 31 to 40 of about 2,012,293 (294)

Atom cooling and trapping by disorder [PDF]

, 1998
We demonstrate the possibility of three-dimensional cooling of neutral atoms by illuminating them with two counterpropagating laser beams of mutually orthogonal linear polarization, where one of the lasers is a speckle field, i.e. a highly disordered but
A. Hemmerich, C. Chesman, C. Cohen-Tannoudji, E. R. Harvey, Gilbert Grynberg, J. C. Dainty, J. Dalibard, J. Dalibard, J. M. Huntley, J. W. Goodman, Jean-Yves Courtois, K. Berg-Sørensen, L. Guidoni, P. Beckmann, P. Beckmann, P. Marte, P. S. Jessen, P. S. Jessen, P. Verkerk, Peter Horak, S. Marksteiner, T. W. Hodapp, U. Persson, Y. Aizu, Y. Castin, Y. Castin   +25 more
core   +2 more sources

Comparison of laser speckle contrast imaging with laser Doppler for assessing microvascular function [PDF]

, 2011
Objective: To compare the inter-day reproducibility of post-occlusive reactive hyperaemia (PORH) and sympathetic vasomotor reflexes assessed by single-point laser Doppler flowmetry (SP-LDF), integrating-probe LDF (IP-LDF) and laser speckle contrast ...
Briers, J. David, Crank, Helen, Hodges, Gary J., Klonizakis, Markos, Tew, Garry A.   +4 more
core   +1 more source

Deep Learning Enabled Laser Speckle Wavemeter with a High Dynamic Range [PDF]

Laser & Photonics reviews, 2019
The speckle pattern produced when a laser is scattered by a disordered medium has recently been shown to give a surprisingly accurate or broadband measurement of wavelength.
Roopam K. Gupta, G. Bruce, S. Powis, K. Dholakia   +3 more
semanticscholar   +1 more source

Speckles in laser Doppler perfusion imaging [PDF]

Optics Letters, 2006
We report on the quantitative influence of speckles in laser Doppler perfusion imaging. The influence of speckles on the signal amplitude and on the Doppler spectrum is demonstrated experimentally for particle suspensions with different scattering levels and various beam widths.
Rajan, V., Varghese, B., van Leeuwen, T. G., Steenbergen, W.   +3 more
openaire   +2 more sources

Clinical applications of laser speckle contrast imaging: a review

Journal of Biomedical Optics, 2019
. When a biological tissue is illuminated with coherent light, an interference pattern will be formed at the detector, the so-called speckle pattern. Laser speckle contrast imaging (LSCI) is a technique based on the dynamic change in this backscattered ...
W. Heeman, W. Steenbergen, G. M. Dam, E. C. Boerma, Christiaan E. Boerma   +4 more
semanticscholar   +1 more source

Tutorial on laser speckle rheology: technology, applications, and opportunities

Journal of Biomedical Optics, 2020
. Significance: The onset of several diseases is frequently marked with anomalous mechanical alteration of the affected tissue at the intersection of cells and their microenvironment. Therefore, mapping the micromechanical attributes of the tissues could
Zeinab Hajjarian, S. Nadkarni
semanticscholar   +1 more source

Normalized ghost imaging [PDF]

, 2012
We present an experimental comparison between different iterative ghost imaging algorithms. Our experimental setup utilizes a spatial light modulator for generating known random light fields to illuminate a partially-transmissive object.
Baoqing Sun, Bennink, Bromberg, Donoho, Duarte, Ferri, Ferri, Gatti, Gatti, Jeffrey H. Shapiro, Katz, Matthew P. Edgar, Miles J. Padgett, Shapiro, Stephen S. Welsh, Valencia   +15 more
core   +3 more sources

Experimental observation of speckle instability in nonlinear disordered media

, 2005
Temporal fluctuations of the speckle pattern formed upon backscattering of a laser beam from an interface between gold and nonlinear polymer film have been observed as a function of optical power.
Agarwal, Ali Gungor, Bliokh, Bosacchi, Bozhevolnyi, Christopher C. Davis, Hickernell, Igor I. Smolyaninov, Kadomzev, Krug, Landau, McGurn, Seal, Shadrivov, Skipetrov, Smolyaninov, Smolyaninov, Spivak, Weber, West, Wiersma, Wysin, Yang, Zakharov, Zayats, Zeldovich   +25 more
core   +1 more source

Experimental study of the transport of coherent interacting matter-waves in a 1D random potential induced by laser speckle [PDF]

, 2006
We present a detailed analysis of the 1D expansion of a coherent interacting matterwave (a Bose-Einstein condensate) in the presence of disorder. A 1D random potential is created via laser speckle patterns.
A Aspect, A F Varón, Ando T, Boyer V, D Clément, Dorokhov O N, Fallani L Lye J E Guarrera V Fort C Inguscio M, Françon M, Goodman J W, Goodman J W, Goodman J W, Graham R Pelster A, J A Retter, L Sanchez-Palencia, Lifshits I M, Mézard M, Nagaoka Y, Newman C M, P Bouyer, Roth R, Sachdev S, Sanchez-Palencia L, Sanchez-Palencia L Gangardt D M Bouyer P Shlyapnikov G V Aspect A, van Tiggelen B, Zoller P Büchler H P Bloch I   +24 more
core   +2 more sources

Controlled modulation of depolarization in laser speckle [PDF]

Optics Letters, 2017
A new technique based on superposition of two speckle patterns is proposed and demonstrated for controlled modulation of the spatial polarization distribution of the resultant speckle. It is demonstrated both theoretically and experimentally that controlled modulation of the spatial polarization distribution of laser speckle can be achieved by proper ...
Abhijit Roy, Rakesh K. Singh, Maruthi M. Brundavanam   +2 more
openaire   +3 more sources