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 | |
| Publication status | Published - 19 May 2015 |
| Externally published | Yes |
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Cite this
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
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TY - JOUR
T1 - Investigation of second- and third-harmonic generation in few-layer gallium selenide by multiphoton microscopy
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.
UR - http://www.scopus.com/inward/record.url?scp=84930226409&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84930226409&partnerID=8YFLogxK
U2 - 10.1038/srep10334
DO - 10.1038/srep10334
M3 - Article
VL - 5
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 10334
ER -