2ND-HARMONIC GENERATION AT LYMAN-ALPHA IN ATOMIC-HYDROGEN

被引：6
|
作者：
MARMET, L
HAKUTA, K
STOICHEFF, BP
机构：
[1] ONTARIO LASER & LIGHTWAVE RES CTR,TORONTO M5S 1A7,ONTARIO,CANADA
[2] UNIV ELECTROCOMMUN,DEPT APPL PHYS & CHEM,CHOFU,TOKYO 182,JAPAN
[3] UNIV ELECTROCOMMUN,INST LASER SCI,CHOFU,TOKYO 182,JAPAN
来源：
OPTICS LETTERS | 1991年 / 16卷 / 04期
关键词：
D O I：
10.1364/OL.16.000261
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Second-harmonic generation in atomic hydrogen is investigated with and without an applied electric field, by tuning laser radiation at 243.1 nm through the 2 2S1/2-1 2S1/2 two-photon resonance. Even at zero applied field, second-harmonic radiation at 121.6 nm was observed. The measured intensity is shown to arise from a charge-separation field caused by ions produced in three-photon ionization. The magnitude of this field is in good agreement with a calculated value based on the measured ion density.
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页码：261 / 263
页数：3
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