Spectral dependence of third-order nonlinear optical properties in InN

Hyeyoung Ahn; M. T. Lee; Y. M. Chang

doi:10.1063/1.4878618

Spectral dependence of third-order nonlinear optical properties in InN

Hyeyoung Ahn^*, M. T. Lee, Y. M. Chang

^*Corresponding author for this work

Department of Photonics

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We report on the nonlinear optical properties of InN measured in a wide near-infrared spectral range with the femtosecond Z-scan technique. The above-bandgap nonlinear absorption in InN is found to originate from the saturation of absorption by the band-state-filling and its cross-section increases drastically near the bandgap energy. With below-bandgap excitation, the nonlinear absorption undergoes a transition from saturation absorption (SA) to reverse-SA (RSA), attributed to the competition between SA of band-tail states and two-photon-related RSA. The measured large nonlinear refractive index of the order of 10^-10 cm²/W indicates InN as a potential material for all-optical switching and related applications.

Original language	English
Article number	201904
Journal	Applied Physics Letters
Volume	104
Issue number	20
DOIs	https://doi.org/10.1063/1.4878618
State	Published - 19 May 2014

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abstract = "We report on the nonlinear optical properties of InN measured in a wide near-infrared spectral range with the femtosecond Z-scan technique. The above-bandgap nonlinear absorption in InN is found to originate from the saturation of absorption by the band-state-filling and its cross-section increases drastically near the bandgap energy. With below-bandgap excitation, the nonlinear absorption undergoes a transition from saturation absorption (SA) to reverse-SA (RSA), attributed to the competition between SA of band-tail states and two-photon-related RSA. The measured large nonlinear refractive index of the order of 10-10 cm2/W indicates InN as a potential material for all-optical switching and related applications.",

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AU - Ahn, Hyeyoung

AU - Lee, M. T.

AU - Chang, Y. M.

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N2 - We report on the nonlinear optical properties of InN measured in a wide near-infrared spectral range with the femtosecond Z-scan technique. The above-bandgap nonlinear absorption in InN is found to originate from the saturation of absorption by the band-state-filling and its cross-section increases drastically near the bandgap energy. With below-bandgap excitation, the nonlinear absorption undergoes a transition from saturation absorption (SA) to reverse-SA (RSA), attributed to the competition between SA of band-tail states and two-photon-related RSA. The measured large nonlinear refractive index of the order of 10-10 cm2/W indicates InN as a potential material for all-optical switching and related applications.

AB - We report on the nonlinear optical properties of InN measured in a wide near-infrared spectral range with the femtosecond Z-scan technique. The above-bandgap nonlinear absorption in InN is found to originate from the saturation of absorption by the band-state-filling and its cross-section increases drastically near the bandgap energy. With below-bandgap excitation, the nonlinear absorption undergoes a transition from saturation absorption (SA) to reverse-SA (RSA), attributed to the competition between SA of band-tail states and two-photon-related RSA. The measured large nonlinear refractive index of the order of 10-10 cm2/W indicates InN as a potential material for all-optical switching and related applications.

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SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

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ER -

Spectral dependence of third-order nonlinear optical properties in InN

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