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

Lasse Karvonen, Antti Säynätjoki, Soroush Mehravar, Raul D. Rodriguez, Susanne Hartmann, Dietrich R.T. Zahn, Seppo Honkanen, Robert A. Norwood, N. Peyghambarian, Khanh Kieu, Harri Lipsanen, Juha Riikonen

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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.

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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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 › peer-review

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 - Karvonen, Lasse

AU - Säynätjoki, Antti

AU - Mehravar, Soroush

AU - Rodriguez, Raul D.

AU - Hartmann, Susanne

AU - Zahn, Dietrich R.T.

AU - Honkanen, Seppo

AU - Norwood, Robert A.

AU - Peyghambarian, N.

AU - Kieu, Khanh

AU - Lipsanen, Harri

AU - Riikonen, Juha

PY - 2015/5/19

Y1 - 2015/5/19

N2 - 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.

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

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