Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides

Enrico Giuseppe Carnemolla; Lucia Caspani; Clayton DeVault; Matteo Clerici; Stefano Vezzoli; Vincenzo Bruno; Vladimir M. Shalaev; Daniele Franco Angelo Faccio; Alexandra Boltasseva; Marcello Ferrera

doi:10.1364/OME.8.003392

Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides

Enrico Giuseppe Carnemolla, Lucia Caspani, Clayton DeVault, Matteo Clerici, Stefano Vezzoli, Vincenzo Bruno, Vladimir M. Shalaev, Daniele Franco Angelo Faccio, Alexandra Boltasseva, Marcello Ferrera

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Abstract

We report the simultaneous increase of both nonlinear Kerr coefficient n2 and third-order nonlinear susceptibility χ^((3)) in aluminum zinc oxide (AZO) attained by pump-probe spectroscopy in a frequency degenerate configuration. Our experiments demonstrate a 6-fold enhancement in the third-order nonlinear susceptibility and over one order of magnitude increase in the nonlinear Kerr coefficient, while also determining two distinct operational wavelengths for optimal modulation of either the real or the imaginary part of the complex refractive index. These results, besides providing a broader spectral characterization of the third-order nonlinearity in AZO thin films, also show the fundamental advantages of performing nonlinear optics via degenerate excitation near the ENZ wavelength

Original language	English
Pages (from-to)	3392-3400
Journal	Optical Materials Express
Volume	8
Issue number	11
Early online date	17 Oct 2018
DOIs	https://doi.org/10.1364/OME.8.003392
Publication status	Published - 1 Nov 2018

Keywords

integrated optics
plasmonics
nanophotonics
nonlinear optics

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Degenerate Optical Nonlinear Enhancement in Epsilon-Near-Zero Transparent Conducting Oxides
Ferrera, M. (Creator) & Carnemolla, E. G. (Creator), Heriot-Watt University, 7 Oct 2018
DOI: 10.17861/f9701bb5-2534-4f91-bd25-2e605b22e0f0
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Carnemolla, Enrico Giuseppe ; Caspani, Lucia ; DeVault, Clayton ; Clerici, Matteo ; Vezzoli, Stefano ; Bruno, Vincenzo ; Shalaev, Vladimir M. ; Faccio, Daniele Franco Angelo ; Boltasseva, Alexandra ; Ferrera, Marcello. / Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides. In: Optical Materials Express. 2018 ; Vol. 8, No. 11. pp. 3392-3400.

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title = "Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides",

abstract = "We report the simultaneous increase of both nonlinear Kerr coefficient n2 and third-order nonlinear susceptibility χ^((3)) in aluminum zinc oxide (AZO) attained by pump-probe spectroscopy in a frequency degenerate configuration. Our experiments demonstrate a 6-fold enhancement in the third-order nonlinear susceptibility and over one order of magnitude increase in the nonlinear Kerr coefficient, while also determining two distinct operational wavelengths for optimal modulation of either the real or the imaginary part of the complex refractive index. These results, besides providing a broader spectral characterization of the third-order nonlinearity in AZO thin films, also show the fundamental advantages of performing nonlinear optics via degenerate excitation near the ENZ wavelength",

keywords = "integrated optics, plasmonics, nanophotonics, nonlinear optics",

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Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides. / Carnemolla, Enrico Giuseppe; Caspani, Lucia; DeVault, Clayton; Clerici, Matteo; Vezzoli, Stefano; Bruno, Vincenzo; Shalaev, Vladimir M.; Faccio, Daniele Franco Angelo; Boltasseva, Alexandra; Ferrera, Marcello.

In: Optical Materials Express, Vol. 8, No. 11, 01.11.2018, p. 3392-3400.

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

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T1 - Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides

AU - Carnemolla, Enrico Giuseppe

AU - Caspani, Lucia

AU - DeVault, Clayton

AU - Clerici, Matteo

AU - Vezzoli, Stefano

AU - Bruno, Vincenzo

AU - Shalaev, Vladimir M.

AU - Faccio, Daniele Franco Angelo

AU - Boltasseva, Alexandra

AU - Ferrera, Marcello

PY - 2018/11/1

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N2 - We report the simultaneous increase of both nonlinear Kerr coefficient n2 and third-order nonlinear susceptibility χ^((3)) in aluminum zinc oxide (AZO) attained by pump-probe spectroscopy in a frequency degenerate configuration. Our experiments demonstrate a 6-fold enhancement in the third-order nonlinear susceptibility and over one order of magnitude increase in the nonlinear Kerr coefficient, while also determining two distinct operational wavelengths for optimal modulation of either the real or the imaginary part of the complex refractive index. These results, besides providing a broader spectral characterization of the third-order nonlinearity in AZO thin films, also show the fundamental advantages of performing nonlinear optics via degenerate excitation near the ENZ wavelength

AB - We report the simultaneous increase of both nonlinear Kerr coefficient n2 and third-order nonlinear susceptibility χ^((3)) in aluminum zinc oxide (AZO) attained by pump-probe spectroscopy in a frequency degenerate configuration. Our experiments demonstrate a 6-fold enhancement in the third-order nonlinear susceptibility and over one order of magnitude increase in the nonlinear Kerr coefficient, while also determining two distinct operational wavelengths for optimal modulation of either the real or the imaginary part of the complex refractive index. These results, besides providing a broader spectral characterization of the third-order nonlinearity in AZO thin films, also show the fundamental advantages of performing nonlinear optics via degenerate excitation near the ENZ wavelength

KW - integrated optics

KW - plasmonics

KW - nanophotonics

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DO - 10.1364/OME.8.003392

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JO - Optical Materials Express

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SN - 2159-3930

IS - 11

ER -

Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides

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Degenerate Optical Nonlinear Enhancement in Epsilon-Near-Zero Transparent Conducting Oxides

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