Broad frequency shift of parametric processes in epsilon-near-zero time-varying media

Vincenzo Bruno; Stefano Vezzoli; Clayton De Vault; Enrico Carnemolla; Marcello Ferrera; Alexandra Boltasseva; Vladimir M. Shalaev; Daniele Faccio; Matteo Clerici

doi:10.3390/app10041318

Broad frequency shift of parametric processes in epsilon-near-zero time-varying media

Vincenzo Bruno, Stefano Vezzoli, Clayton De Vault, Enrico Carnemolla, Marcello Ferrera, Alexandra Boltasseva, Vladimir M. Shalaev, Daniele Faccio, Matteo Clerici^*

^*Corresponding author for this work

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

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Abstract

The ultrafast changes of material properties induced by short laser pulses can lead to a frequency shift of reflected and transmitted radiation. Recent reports highlight how such a frequency shift is enhanced in spectral regions where the material features a near-zero real part of the permittivity. Here, we investigate the frequency shift for fields generated by four-wave mixing. In our experiment, we observed a frequency shift of more than 60 nm (compared to the pulse width of 40 nm) in the phase conjugated radiation generated by a 500 nm aluminium-doped zinc oxide (AZO) film pumped close to the epsilon-near-zero wavelength. Our results indicate applications of time-varying media for nonlinear optics and frequency conversion.

Original language	English
Article number	1318
Journal	Applied Sciences
Volume	10
Issue number	4
DOIs	https://doi.org/10.3390/app10041318
Publication status	Published - 15 Feb 2020

Keywords

Epsilon-near-zero media
Four-wave mixing
Frequency shift
Optical kerr nonlinearities
Time-varying media
Transparent conductive oxides

ASJC Scopus subject areas

General Materials Science
Instrumentation
General Engineering
Process Chemistry and Technology
Computer Science Applications
Fluid Flow and Transfer Processes

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Cite this

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title = "Broad frequency shift of parametric processes in epsilon-near-zero time-varying media",

abstract = "The ultrafast changes of material properties induced by short laser pulses can lead to a frequency shift of reflected and transmitted radiation. Recent reports highlight how such a frequency shift is enhanced in spectral regions where the material features a near-zero real part of the permittivity. Here, we investigate the frequency shift for fields generated by four-wave mixing. In our experiment, we observed a frequency shift of more than 60 nm (compared to the pulse width of 40 nm) in the phase conjugated radiation generated by a 500 nm aluminium-doped zinc oxide (AZO) film pumped close to the epsilon-near-zero wavelength. Our results indicate applications of time-varying media for nonlinear optics and frequency conversion.",

keywords = "Epsilon-near-zero media, Four-wave mixing, Frequency shift, Optical kerr nonlinearities, Time-varying media, Transparent conductive oxides",

author = "Vincenzo Bruno and Stefano Vezzoli and {De Vault}, Clayton and Enrico Carnemolla and Marcello Ferrera and Alexandra Boltasseva and Shalaev, {Vladimir M.} and Daniele Faccio and Matteo Clerici",

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AU - Bruno, Vincenzo

AU - Vezzoli, Stefano

AU - De Vault, Clayton

AU - Carnemolla, Enrico

AU - Ferrera, Marcello

AU - Boltasseva, Alexandra

AU - Shalaev, Vladimir M.

AU - Faccio, Daniele

AU - Clerici, Matteo

PY - 2020/2/15

Y1 - 2020/2/15

N2 - The ultrafast changes of material properties induced by short laser pulses can lead to a frequency shift of reflected and transmitted radiation. Recent reports highlight how such a frequency shift is enhanced in spectral regions where the material features a near-zero real part of the permittivity. Here, we investigate the frequency shift for fields generated by four-wave mixing. In our experiment, we observed a frequency shift of more than 60 nm (compared to the pulse width of 40 nm) in the phase conjugated radiation generated by a 500 nm aluminium-doped zinc oxide (AZO) film pumped close to the epsilon-near-zero wavelength. Our results indicate applications of time-varying media for nonlinear optics and frequency conversion.

AB - The ultrafast changes of material properties induced by short laser pulses can lead to a frequency shift of reflected and transmitted radiation. Recent reports highlight how such a frequency shift is enhanced in spectral regions where the material features a near-zero real part of the permittivity. Here, we investigate the frequency shift for fields generated by four-wave mixing. In our experiment, we observed a frequency shift of more than 60 nm (compared to the pulse width of 40 nm) in the phase conjugated radiation generated by a 500 nm aluminium-doped zinc oxide (AZO) film pumped close to the epsilon-near-zero wavelength. Our results indicate applications of time-varying media for nonlinear optics and frequency conversion.

KW - Epsilon-near-zero media

KW - Four-wave mixing

KW - Frequency shift

KW - Optical kerr nonlinearities

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Broad frequency shift of parametric processes in epsilon-near-zero time-varying media

Abstract

Keywords

ASJC Scopus subject areas

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