Photoemission under three-photon excitation in a NEA GaAs photocathode

Liming Wang; Xun Hou; Zhao Cheng

doi:10.1117/12.43682

Photoemission under three-photon excitation in a NEA GaAs photocathode

Liming Wang
, Xun Hou
, Zhao Cheng

Chinese Academy of Sciences

科研成果: 期刊稿件 › 会议文章 › 同行评审

摘要

The electron emission due to 2.06um Q-switched laser excitation on Cs, O₂ activated GaAs photocathodes with different sensitivity has been measured. The cubic dependence on fluence is consistent with three-photon excitation across the bandgap of GaAs semiconductor. The same cubic response in photoelectron emission at liquid nitrogen temperature (77K) demonstrates that the electron emission is three-photon photoemission and thermal emission is negligible. The characteristics of multiphoton photoemission is strongly determined by the sensitivity of photocathode. A formula basing on three-order perturbation theory accounts quantitatively for our observation.

源语言	英语
页（从-至）	120-126
页数	7
期刊	Proceedings of SPIE - The International Society for Optical Engineering
卷	1415
DOI	https://doi.org/10.1117/12.43682
出版状态	已出版 - 1991
已对外发布	是
活动	Modeling and Simulation of Laser Systems II - Los Angeles, CA, USA 期限: 23 1月 1991 → 24 1月 1991

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@article{b87896979b2648368dfb35d9517b909e,

title = "Photoemission under three-photon excitation in a NEA GaAs photocathode",

abstract = "The electron emission due to 2.06um Q-switched laser excitation on Cs, O2 activated GaAs photocathodes with different sensitivity has been measured. The cubic dependence on fluence is consistent with three-photon excitation across the bandgap of GaAs semiconductor. The same cubic response in photoelectron emission at liquid nitrogen temperature (77K) demonstrates that the electron emission is three-photon photoemission and thermal emission is negligible. The characteristics of multiphoton photoemission is strongly determined by the sensitivity of photocathode. A formula basing on three-order perturbation theory accounts quantitatively for our observation.",

author = "Liming Wang and Xun Hou and Zhao Cheng",

year = "1991",

doi = "10.1117/12.43682",

language = "英语",

volume = "1415",

pages = "120--126",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "SPIE",

note = "Modeling and Simulation of Laser Systems II ; Conference date: 23-01-1991 Through 24-01-1991",

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TY - JOUR

T1 - Photoemission under three-photon excitation in a NEA GaAs photocathode

AU - Wang, Liming

AU - Hou, Xun

AU - Cheng, Zhao

PY - 1991

Y1 - 1991

N2 - The electron emission due to 2.06um Q-switched laser excitation on Cs, O2 activated GaAs photocathodes with different sensitivity has been measured. The cubic dependence on fluence is consistent with three-photon excitation across the bandgap of GaAs semiconductor. The same cubic response in photoelectron emission at liquid nitrogen temperature (77K) demonstrates that the electron emission is three-photon photoemission and thermal emission is negligible. The characteristics of multiphoton photoemission is strongly determined by the sensitivity of photocathode. A formula basing on three-order perturbation theory accounts quantitatively for our observation.

AB - The electron emission due to 2.06um Q-switched laser excitation on Cs, O2 activated GaAs photocathodes with different sensitivity has been measured. The cubic dependence on fluence is consistent with three-photon excitation across the bandgap of GaAs semiconductor. The same cubic response in photoelectron emission at liquid nitrogen temperature (77K) demonstrates that the electron emission is three-photon photoemission and thermal emission is negligible. The characteristics of multiphoton photoemission is strongly determined by the sensitivity of photocathode. A formula basing on three-order perturbation theory accounts quantitatively for our observation.

UR - https://www.scopus.com/pages/publications/0025838482

U2 - 10.1117/12.43682

DO - 10.1117/12.43682

M3 - 会议文章

AN - SCOPUS:0025838482

SN - 0277-786X

VL - 1415

SP - 120

EP - 126

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Modeling and Simulation of Laser Systems II

Y2 - 23 January 1991 through 24 January 1991

ER -

Photoemission under three-photon excitation in a NEA GaAs photocathode

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