Extraordinarily large permittivity modulation in zinc oxide for dynamic nanophotonics
Abstract
The dielectric permittivity of a material encapsulates the essential physics of light-matter interaction into the material's local response to optical excitation. Photo-induced modulation of the permittivity can enable an unprecedented level of control over the phase, amplitude, and polarization of light. Therefore, the detailed dynamic characterization of technology-relevant materials with substantially tunable optical properties and fast response times is a crucial step to realize tunable optical devices. This work reports on the extraordinarily large permittivity changes in zinc oxide thin films (up to similar to 3.6 relative change in the real part of the dielectric permittivity at 1600 nm wavelength) induced by optically generated free carriers. We demonstrate broadband reflectance modulation up to 70% in metal-backed oxide mirrors at the telecommunication wavelengths, with picosecond-scale relaxation times. The epsilon near zero points of the films can be dynamically shifted from 8.5 mm to 1.6 mm by controlling the pump fluence. Additionally, the modulation can be selectively enhanced at specific wavelengths employing metal-backed zinc oxide disks while maintaining picosecond-scale switching times. This work provides insights into the free-carrier assisted permittivity modulation in zinc oxide and could enable the realization of novel dynamic devices for beam-steering, polarizers, and spatial light modulators.
- Authors:
-
- Purdue Univ., West Lafayette, IN (United States); Purdue Univ., West Lafayette, IN (United States). Birck Nanotechnology Center
- Harvard Univ., Cambridge, MA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; US Air Force Office of Scientific Research (AFOSR); US Office of Naval Research (ONR); USDOE
- OSTI Identifier:
- 1798168
- Alternate Identifier(s):
- OSTI ID: 1780258
- Grant/Contract Number:
- AC02-06CH11357; FA9550-18-1-0002; FA9550-19-S-0003; SC0017717; N00014-18-1-2481
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials Today
- Additional Journal Information:
- Journal Volume: 43; Journal ID: ISSN 1369-7021
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Saha, Soham, Dutta, Aveek, DeVault, Clayton, Diroll, Benjamin T., Schaller, Richard D., Kudyshev, Zhaxylyk, Xu, Xiaohui, Kildishev, Alexander, Shalaev, Vladimir M., and Boltasseva, Alexandra. Extraordinarily large permittivity modulation in zinc oxide for dynamic nanophotonics. United States: N. p., 2020.
Web. doi:10.1016/j.mattod.2020.10.023.
Saha, Soham, Dutta, Aveek, DeVault, Clayton, Diroll, Benjamin T., Schaller, Richard D., Kudyshev, Zhaxylyk, Xu, Xiaohui, Kildishev, Alexander, Shalaev, Vladimir M., & Boltasseva, Alexandra. Extraordinarily large permittivity modulation in zinc oxide for dynamic nanophotonics. United States. https://doi.org/10.1016/j.mattod.2020.10.023
Saha, Soham, Dutta, Aveek, DeVault, Clayton, Diroll, Benjamin T., Schaller, Richard D., Kudyshev, Zhaxylyk, Xu, Xiaohui, Kildishev, Alexander, Shalaev, Vladimir M., and Boltasseva, Alexandra. Tue .
"Extraordinarily large permittivity modulation in zinc oxide for dynamic nanophotonics". United States. https://doi.org/10.1016/j.mattod.2020.10.023. https://www.osti.gov/servlets/purl/1798168.
@article{osti_1798168,
title = {Extraordinarily large permittivity modulation in zinc oxide for dynamic nanophotonics},
author = {Saha, Soham and Dutta, Aveek and DeVault, Clayton and Diroll, Benjamin T. and Schaller, Richard D. and Kudyshev, Zhaxylyk and Xu, Xiaohui and Kildishev, Alexander and Shalaev, Vladimir M. and Boltasseva, Alexandra},
abstractNote = {The dielectric permittivity of a material encapsulates the essential physics of light-matter interaction into the material's local response to optical excitation. Photo-induced modulation of the permittivity can enable an unprecedented level of control over the phase, amplitude, and polarization of light. Therefore, the detailed dynamic characterization of technology-relevant materials with substantially tunable optical properties and fast response times is a crucial step to realize tunable optical devices. This work reports on the extraordinarily large permittivity changes in zinc oxide thin films (up to similar to 3.6 relative change in the real part of the dielectric permittivity at 1600 nm wavelength) induced by optically generated free carriers. We demonstrate broadband reflectance modulation up to 70% in metal-backed oxide mirrors at the telecommunication wavelengths, with picosecond-scale relaxation times. The epsilon near zero points of the films can be dynamically shifted from 8.5 mm to 1.6 mm by controlling the pump fluence. Additionally, the modulation can be selectively enhanced at specific wavelengths employing metal-backed zinc oxide disks while maintaining picosecond-scale switching times. This work provides insights into the free-carrier assisted permittivity modulation in zinc oxide and could enable the realization of novel dynamic devices for beam-steering, polarizers, and spatial light modulators.},
doi = {10.1016/j.mattod.2020.10.023},
journal = {Materials Today},
number = ,
volume = 43,
place = {United States},
year = {Tue Nov 24 00:00:00 EST 2020},
month = {Tue Nov 24 00:00:00 EST 2020}
}
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