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

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.

Original language	English
Article number	10334
Journal	Scientific Reports
Volume	5
DOIs	https://doi.org/10.1038/srep10334
Publication status	Published - 19 May 2015
Externally published	Yes

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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, 5, [10334]. https://doi.org/10.1038/srep10334

Investigation of second- and third-harmonic generation in few-layer gallium selenide by multiphoton microscopy. / Karvonen, Lasse; Säynätjoki, Antti; Mehravar, Soroush; Rodriguez, Raul D.; Hartmann, Susanne; Zahn, Dietrich R.T.; Honkanen, Seppo; Norwood, Robert A.; Peyghambarian, N.; Kieu, Khanh; Lipsanen, Harri; Riikonen, Juha.

In: Scientific Reports, Vol. 5, 10334, 19.05.2015.

Research output: Contribution to journal › Article

Karvonen, Lasse ; Säynätjoki, Antti ; Mehravar, Soroush ; Rodriguez, Raul D. ; Hartmann, Susanne ; Zahn, Dietrich R.T. ; Honkanen, Seppo ; Norwood, Robert A. ; Peyghambarian, N. ; Kieu, Khanh ; Lipsanen, Harri ; Riikonen, Juha. / Investigation of second- and third-harmonic generation in few-layer gallium selenide by multiphoton microscopy. In: Scientific Reports. 2015 ; Vol. 5.

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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.",

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AU - Rodriguez, Raul D.

AU - Hartmann, Susanne

AU - Zahn, Dietrich R.T.

AU - Honkanen, Seppo

AU - Norwood, Robert A.

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AU - Kieu, Khanh

AU - Lipsanen, Harri

AU - Riikonen, Juha

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