Collimated UV light generation by two-photon excitation to a Rydberg state in Rb vapor

被引：21

作者：

Lam, Mark ^{[1
]}

Pal, Sambit B. ^{[1
]}

Vogt, Thibault ^{[1
,2
]}

Gross, Christian ^{[1
]}

Kiffner, Martin ^{[1
,3
]}

Li, Wenhui ^{[1
,4
]}

机构：

[1] Natl Univ Singapore, Ctr Quantum Technol, 3 Sci Dr 2, Singapore 117543, Singapore

[2] CNRS UNS NUS NTU Int Joint Res Unit UMI 3654, MajuLab, Singapore 117543, Singapore

[3] Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[4] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

OPTICS LETTERS | 2019年 / 44卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

FREQUENCY-UP-CONVERSION; LASER-BEAM; COHERENT; INVERSION; BLUE;

D O I：

10.1364/OL.44.002931

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We use two continuous-wave laser beams of 780 nm and 515 nm to optically drive Rb-85 atoms in a heated vapor cell to a low-lying Rydberg state 10D(5/2). We observe a collimated ultraviolet (UV) beam at 311 nm, corresponding to the transition frequency from the 11P(3/2) state to the 5S(1/2) state. This indicates the presence of a coherent four-wave mixing process, built up by two input laser fields as well as terahertz (THz) radiation of 3.28 THz, which is generated by amplified spontaneous emission between the 10D(5/2) and 11P(3/2) states. We characterize the 311 nm UV light generation and its dependence on various physical parameters. This scheme could open up a new possibility for generating narrow-band THz waves as well as deep UV radiation. (C) 2019 Optical Society of America

引用

页码：2931 / 2934

页数：4

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