Investigation of second- and third-harmonic generation in few-layer gallium selenide by multiphoton microscopy
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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Scientific Reports, Volume 5, pp. 1-8
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
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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