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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)3392-3400
JournalOptical Materials Express
Volume8
Issue number11
Early online date17 Oct 2018
DOIs
Publication statusPublished - 1 Nov 2018

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zinc oxides
aluminum oxides
magnetic permeability
conduction
oxides
augmentation
nonlinear optics
coefficients
wavelengths
nonlinearity
refractivity
pumps
modulation
probes
thin films
configurations
spectroscopy
excitation

Keywords

  • integrated optics
  • plasmonics
  • nanophotonics
  • nonlinear optics

Cite this

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",
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author = "Carnemolla, {Enrico Giuseppe} and Lucia Caspani and Clayton DeVault and Matteo Clerici and Stefano Vezzoli and Vincenzo Bruno and Shalaev, {Vladimir M.} and Faccio, {Daniele Franco Angelo} and Alexandra Boltasseva and Marcello Ferrera",
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Carnemolla, EG, Caspani, L, DeVault, C, Clerici, M, Vezzoli, S, Bruno, V, Shalaev, VM, Faccio, DFA, Boltasseva, A & Ferrera, M 2018, 'Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides', Optical Materials Express, vol. 8, no. 11, pp. 3392-3400. https://doi.org/10.1364/OME.8.003392

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 journalArticle

TY - JOUR

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

Y1 - 2018/11/1

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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Carnemolla EG, Caspani L, DeVault C, Clerici M, Vezzoli S, Bruno V et al. Degenerate optical nonlinear enhancement in epsilon-near-zero transparent conducting oxides. Optical Materials Express. 2018 Nov 1;8(11):3392-3400. https://doi.org/10.1364/OME.8.003392