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Title: High-harmonic generation from an epsilon-near-zero material

Abstract

High-harmonic generation (HHG) is a signature optical phenomenon of strongly driven, nonlinear optical systems. Specifically, the understanding of the HHG process in rare gases has played a key role in the development of attosecond science. Recently, HHG has also been reported in solids, providing novel opportunities such as controlling strong-field and attosecond processes in dense optical media down to the nanoscale. Here, we report HHG from a low-loss, indium-doped cadmium oxide thin film by leveraging the epsilon-near-zero (ENZ) effect, whereby the real part of the material’s permittivity in certain spectral ranges vanishes, as well as the associated large resonant enhancement of the driving laser field. We find that ENZ-assisted harmonics exhibit a pronounced spectral redshift as well as linewidth broadening, resulting from the photo induced electron heating and the consequent time-dependent ENZ wavelength of the material. Furthermore, our results provide a new platform to study strong-field and ultrafast electron dynamics in ENZ materials, reveal new degrees of freedom for spectral and temporal control of HHG, and open up the possibilities of compact solid-state attosecond light sources.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [2];  [5];  [5]; ORCiD logo [5];  [4]; ORCiD logo [2]; ORCiD logo [4]
  1. Tsinghua Univ., Beijing (China)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  5. North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1544801
Report Number(s):
SAND-2019-8250J
Journal ID: ISSN 1745-2473; 677498
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Nature Physics
Additional Journal Information:
Journal Volume: 15; Journal Issue: 10; Journal ID: ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Yang, Yuanmu, Lu, Jian, Manjavacas, Alejandro, Luk, Ting S., Liu, Hanzhe, Kelley, Kyle, Maria, Jon -Paul, Runnerstrom, Evan L., Sinclair, Michael B., Ghimire, Shambhu, and Brener, Igal. High-harmonic generation from an epsilon-near-zero material. United States: N. p., 2019. Web. doi:10.1038/s41567-019-0584-7.
Yang, Yuanmu, Lu, Jian, Manjavacas, Alejandro, Luk, Ting S., Liu, Hanzhe, Kelley, Kyle, Maria, Jon -Paul, Runnerstrom, Evan L., Sinclair, Michael B., Ghimire, Shambhu, & Brener, Igal. High-harmonic generation from an epsilon-near-zero material. United States. doi:10.1038/s41567-019-0584-7.
Yang, Yuanmu, Lu, Jian, Manjavacas, Alejandro, Luk, Ting S., Liu, Hanzhe, Kelley, Kyle, Maria, Jon -Paul, Runnerstrom, Evan L., Sinclair, Michael B., Ghimire, Shambhu, and Brener, Igal. Mon . "High-harmonic generation from an epsilon-near-zero material". United States. doi:10.1038/s41567-019-0584-7. https://www.osti.gov/servlets/purl/1544801.
@article{osti_1544801,
title = {High-harmonic generation from an epsilon-near-zero material},
author = {Yang, Yuanmu and Lu, Jian and Manjavacas, Alejandro and Luk, Ting S. and Liu, Hanzhe and Kelley, Kyle and Maria, Jon -Paul and Runnerstrom, Evan L. and Sinclair, Michael B. and Ghimire, Shambhu and Brener, Igal},
abstractNote = {High-harmonic generation (HHG) is a signature optical phenomenon of strongly driven, nonlinear optical systems. Specifically, the understanding of the HHG process in rare gases has played a key role in the development of attosecond science. Recently, HHG has also been reported in solids, providing novel opportunities such as controlling strong-field and attosecond processes in dense optical media down to the nanoscale. Here, we report HHG from a low-loss, indium-doped cadmium oxide thin film by leveraging the epsilon-near-zero (ENZ) effect, whereby the real part of the material’s permittivity in certain spectral ranges vanishes, as well as the associated large resonant enhancement of the driving laser field. We find that ENZ-assisted harmonics exhibit a pronounced spectral redshift as well as linewidth broadening, resulting from the photo induced electron heating and the consequent time-dependent ENZ wavelength of the material. Furthermore, our results provide a new platform to study strong-field and ultrafast electron dynamics in ENZ materials, reveal new degrees of freedom for spectral and temporal control of HHG, and open up the possibilities of compact solid-state attosecond light sources.},
doi = {10.1038/s41567-019-0584-7},
journal = {Nature Physics},
number = 10,
volume = 15,
place = {United States},
year = {2019},
month = {7}
}

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