Investigation of second- and third-harmonic generation in few-layer gallium selenide by multiphoton microscopy

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal
View/Open full text file from the Research portal
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-8
Series
SCIENTIFIC REPORTS, Volume 5
Abstract
Gallium selenide (GaSe) is a layered semiconductor and a well-known nonlinear optical crystal. The discovery of graphene has created a new vast research field focusing on two-dimensional materials. We report on the nonlinear optical properties of few-layer GaSe using multiphoton microscopy. Both second- and third-harmonic generation from few-layer GaSe flakes were observed. Unexpectedly, even the peak at the wavelength of 390 nm, corresponding to the fourth-harmonic generation or the sum frequency generation from third-harmonic generation and pump light, was detected during the spectral measurements in thin GaSe flakes.
Description
Keywords
Other note
Citation
Karvonen, L, Säynätjoki, A, Mehravar, S, Rodriguez, R D, Hartmann, S, Zahn, D R T, Honkanen, S, Norwood, R A, Peyghambarian, N, Kieu, K, Lipsanen, H & Riikonen, J 2015, ' Investigation of second- and third-harmonic generation in few-layer gallium selenide by multiphoton microscopy ', Scientific Reports, vol. 5, 10334, pp. 1-8 . https://doi.org/10.1038/srep10334