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A compact and stable incidence-plane-rotating second harmonics detector

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Title
A compact and stable incidence-plane-rotating second harmonics detector
Author(s)
S. H. Kim; S. Jung; B. Seok; Y. S. Kim; H. Park; T. Otsu; Y. Kobayashi; Kim, Changyoung; Yukiaki, Ishida
Publication Date
2021-04
Journal
Review of Scientific Instruments, v.92, no.4
Publisher
American Institute of Physics Inc.
Abstract
© 2021 Author(s).We describe a compact and stable setup for detecting the optical second harmonics, in which the incident plane rotates with respect to the sample. The setup is composed of rotating Fresnel rhomb optics and a femtosecond ytterbium-doped fiber laser source operating at the repetition frequency of 10 MHz. The setup including the laser source occupies an area of 1 m2 and is stable so that the intensity fluctuation of the laser harmonics can be less than 0.2% for 4 h. We present the isotropic harmonic signal of a gold mirror of 0.5 pW and demonstrate the integrity and sensitivity of the setup. We also show the polarization-dependent six-fold pattern of the harmonics of a few-layer WSe2, from which we infer the degree of local-field effects. Finally, we describe the extensibility of the setup to investigate the samples in various conditions such as cryogenic, strained, ultrafast non-equilibrium, and high magnetic fields.
URI
https://pr.ibs.re.kr/handle/8788114/9724
DOI
10.1063/5.0047337
ISSN
0034-6748
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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