We report the simultaneous increase of both nonlinear Kerr coefficient n(2) and third-order nonlinear susceptibility chi((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. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

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

Caspani L;Clerici M;
2018-01-01

Abstract

We report the simultaneous increase of both nonlinear Kerr coefficient n(2) and third-order nonlinear susceptibility chi((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. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.
2018
Carnemolla, Eg; Caspani, L; Devault, C; Clerici, M; Vezzoli, S; Bruno, V; Shalaev, Vm; Faccio, D; Boltasseva, A; Ferrera, M
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2165601
 Attenzione

L'Ateneo sottopone a validazione solo i file PDF allegati

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 49
  • ???jsp.display-item.citation.isi??? 43
social impact