Optical nonlinear dynamics in ZnS from femtosecond laser pulses

Optical nonlinear dynamics in ZnS from femtosecond laser pulses

A wavelength swapping nondegenerate pump-probe technique to measure the magnitudes of the nonlinear optical dynamics as well as the relaxation time of electrons in high energy levels is presented using a ZnS single crystal wafer as an example. By pumping the sample with 800 nm femtosecond pulses and...

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Main Authors: Yu-E Wu, Mengxin Ren, Zhenhua Wang, Wenhua Li, Qiang Wu, Sanming Yi, Xinzheng Zhang, Jingjun Xu
Format: Article
Language:English
Published: AIP Publishing LLC 2014-05-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.4876235
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spelling doaj-bb0453d5b495435e9adf74e3928e9e3e2020-11-25T00:23:28ZengAIP Publishing LLCAIP Advances2158-32262014-05-0145057107057107-710.1063/1.4876235008405ADVOptical nonlinear dynamics in ZnS from femtosecond laser pulsesYu-E Wu0Mengxin Ren1Zhenhua Wang2Wenhua Li3Qiang Wu4Sanming Yi5Xinzheng Zhang6Jingjun Xu7The MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaThe MOE Key Laboratory of Weak-Light Nonlinear Photonics, and TEDA Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, ChinaA wavelength swapping nondegenerate pump-probe technique to measure the magnitudes of the nonlinear optical dynamics as well as the relaxation time of electrons in high energy levels is presented using a ZnS single crystal wafer as an example. By pumping the sample with 800 nm femtosecond pulses and probing at 400 nm, nondegenerate two-photon absorption (N-2PA) happens exclusively, and the measured curves only show instantaneous features without relaxation tails. The N-2PA coefficient was derived explicitly as 7.52 cm/GW. Additionally, when the wavelengths of the pump and probe beams are swapped, extra information about the relaxation time of the hot electrons excited in the conduction band is obtained. The combined results above are helpful for evaluating the characteristics of an optical switches based on ZnS or other materials with respect to its nonlinear optical dynamic aspect.http://dx.doi.org/10.1063/1.4876235
collection DOAJ
language English
format Article
sources DOAJ
author Yu-E Wu
Mengxin Ren
Zhenhua Wang
Wenhua Li
Qiang Wu
Sanming Yi
Xinzheng Zhang
Jingjun Xu
spellingShingle Yu-E Wu
Mengxin Ren
Zhenhua Wang
Wenhua Li
Qiang Wu
Sanming Yi
Xinzheng Zhang
Jingjun Xu
Optical nonlinear dynamics in ZnS from femtosecond laser pulses
AIP Advances
author_facet Yu-E Wu
Mengxin Ren
Zhenhua Wang
Wenhua Li
Qiang Wu
Sanming Yi
Xinzheng Zhang
Jingjun Xu
author_sort Yu-E Wu
title Optical nonlinear dynamics in ZnS from femtosecond laser pulses
title_short Optical nonlinear dynamics in ZnS from femtosecond laser pulses
title_full Optical nonlinear dynamics in ZnS from femtosecond laser pulses
title_fullStr Optical nonlinear dynamics in ZnS from femtosecond laser pulses
title_full_unstemmed Optical nonlinear dynamics in ZnS from femtosecond laser pulses
title_sort optical nonlinear dynamics in zns from femtosecond laser pulses
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2014-05-01
description A wavelength swapping nondegenerate pump-probe technique to measure the magnitudes of the nonlinear optical dynamics as well as the relaxation time of electrons in high energy levels is presented using a ZnS single crystal wafer as an example. By pumping the sample with 800 nm femtosecond pulses and probing at 400 nm, nondegenerate two-photon absorption (N-2PA) happens exclusively, and the measured curves only show instantaneous features without relaxation tails. The N-2PA coefficient was derived explicitly as 7.52 cm/GW. Additionally, when the wavelengths of the pump and probe beams are swapped, extra information about the relaxation time of the hot electrons excited in the conduction band is obtained. The combined results above are helpful for evaluating the characteristics of an optical switches based on ZnS or other materials with respect to its nonlinear optical dynamic aspect.
url http://dx.doi.org/10.1063/1.4876235
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AT wenhuali opticalnonlineardynamicsinznsfromfemtosecondlaserpulses
AT qiangwu opticalnonlineardynamicsinznsfromfemtosecondlaserpulses
AT sanmingyi opticalnonlineardynamicsinznsfromfemtosecondlaserpulses
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