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Broad Frequency Shift of Parametric Processes in Epsilon-Near-Zero Time-Varying Media

Journal Article · · Applied Sciences
DOI:https://doi.org/10.3390/app10041318· OSTI ID:1803151
 [1];  [2];  [3];  [4];  [5];  [3];  [3];  [6];  [7]
  1. Univ. of Glasgow, Scotland (United Kingdom). School of Physics and Astronomy; OSTI
  2. Imperial College, London (United Kingdom). The Blackett Laboratory, Dept. of Physics
  3. Purdue Univ., West Lafayette, IN (United States). Purdue Quantum Science and Engineering Inst. and School of Electrical and Computer Engineering and Birck Nanotechnology Center
  4. Heriot-Watt Univ., Edinburgh (United Kingdom). Inst. of Photonics and Quantum Sciences
  5. Heriot-Watt Univ., Edinburgh (United Kingdom). Inst. of Photonics and Quantum Sciences
  6. Univ. of Glasgow, Scotland (United Kingdom). School of Physics and Astronomy
  7. Univ. of Glasgow, Scotland (United Kingdom). School of Engineering

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.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0017717
OSTI ID:
1803151
Journal Information:
Applied Sciences, Journal Name: Applied Sciences Journal Issue: 4 Vol. 10; ISSN ASPCC7; ISSN 2076-3417
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Resonance-enhanced spectral funneling in Fabry–Perot resonators with a temporal boundary mirror journal January 2022