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Title: Broadband, High-Speed, and Large-Amplitude Dynamic Optical Switching with Yttrium-Doped Cadmium Oxide

Abstract

Transparent conducting oxides, such as doped indium oxide, zinc oxide, and cadmium oxide (CdO), have recently attracted attention as tailorable materials for applications in nanophotonic and plasmonic devices such as low-loss modulators and all-optical switches due to their tunable optical properties, fast optical response, and low losses. Here, optically induced extraordinarily large reflection changes (up to 135%) are demonstrated in bulk CdO films in the mid-infrared wavelength range close to the epsilon near zero (ENZ) point. To develop a better understanding of how doping level affects the static and dynamic optical properties of CdO, the evolution of the optical properties with yttrium (Y) doping is investigated. An increase in the metallicity and a blueshift of the ENZ point with increasing Y-concentrations is observed. Broadband all-optical switching from near-infrared to mid-infrared wavelengths is demonstrated. The major photoexcited carrier relaxation mechanisms in CdO are identified and it is shown that the relaxation times can be significantly reduced by increasing the dopant concentration in the film. Our report could pave the way to practical dynamic and passive optical and plasmonic devices with doped CdO spanning wavelengths from the ultraviolet to the mid-infrared region.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [1]; ORCiD logo [1]; ORCiD logo [1];  [3]; ORCiD logo [3]; ORCiD logo [4];  [1]; ORCiD logo [1]; ORCiD logo [3]
  1. Birck Nanotechnology Center, West Lafayette, IN (United States); Purdue Univ., West Lafayette, IN (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1631964
Alternate Identifier(s):
OSTI ID: 1579422; OSTI ID: 1595422
Report Number(s):
SAND-2019-15308J
Journal ID: ISSN 1616-301X; 157860
Grant/Contract Number:  
AC02-06CH11357; NA‐0003525; AC02‐06CH11357; SC0017717; AC04-94AL85000; FA9550‐18‐1‐0002
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 7; Journal ID: ISSN 1616-301X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; all optical switching; cadmium oxide; epsilon near zero; high mobility transparent conducting oxide; mid infrared plasmonics

Citation Formats

Saha, Soham, Diroll, Benjamin T., Shank, Joshua, Kudyshev, Zhaxylyk, Dutta, Aveek, Chowdhury, Sarah Nahar, Luk, Ting Shan, Campione, Salvatore, Schaller, Richard D., Shalaev, Vladimir M., Boltasseva, Alexandra, and Wood, Michael G.. Broadband, High-Speed, and Large-Amplitude Dynamic Optical Switching with Yttrium-Doped Cadmium Oxide. United States: N. p., 2019. Web. https://doi.org/10.1002/adfm.201908377.
Saha, Soham, Diroll, Benjamin T., Shank, Joshua, Kudyshev, Zhaxylyk, Dutta, Aveek, Chowdhury, Sarah Nahar, Luk, Ting Shan, Campione, Salvatore, Schaller, Richard D., Shalaev, Vladimir M., Boltasseva, Alexandra, & Wood, Michael G.. Broadband, High-Speed, and Large-Amplitude Dynamic Optical Switching with Yttrium-Doped Cadmium Oxide. United States. https://doi.org/10.1002/adfm.201908377
Saha, Soham, Diroll, Benjamin T., Shank, Joshua, Kudyshev, Zhaxylyk, Dutta, Aveek, Chowdhury, Sarah Nahar, Luk, Ting Shan, Campione, Salvatore, Schaller, Richard D., Shalaev, Vladimir M., Boltasseva, Alexandra, and Wood, Michael G.. Fri . "Broadband, High-Speed, and Large-Amplitude Dynamic Optical Switching with Yttrium-Doped Cadmium Oxide". United States. https://doi.org/10.1002/adfm.201908377. https://www.osti.gov/servlets/purl/1631964.
@article{osti_1631964,
title = {Broadband, High-Speed, and Large-Amplitude Dynamic Optical Switching with Yttrium-Doped Cadmium Oxide},
author = {Saha, Soham and Diroll, Benjamin T. and Shank, Joshua and Kudyshev, Zhaxylyk and Dutta, Aveek and Chowdhury, Sarah Nahar and Luk, Ting Shan and Campione, Salvatore and Schaller, Richard D. and Shalaev, Vladimir M. and Boltasseva, Alexandra and Wood, Michael G.},
abstractNote = {Transparent conducting oxides, such as doped indium oxide, zinc oxide, and cadmium oxide (CdO), have recently attracted attention as tailorable materials for applications in nanophotonic and plasmonic devices such as low-loss modulators and all-optical switches due to their tunable optical properties, fast optical response, and low losses. Here, optically induced extraordinarily large reflection changes (up to 135%) are demonstrated in bulk CdO films in the mid-infrared wavelength range close to the epsilon near zero (ENZ) point. To develop a better understanding of how doping level affects the static and dynamic optical properties of CdO, the evolution of the optical properties with yttrium (Y) doping is investigated. An increase in the metallicity and a blueshift of the ENZ point with increasing Y-concentrations is observed. Broadband all-optical switching from near-infrared to mid-infrared wavelengths is demonstrated. The major photoexcited carrier relaxation mechanisms in CdO are identified and it is shown that the relaxation times can be significantly reduced by increasing the dopant concentration in the film. Our report could pave the way to practical dynamic and passive optical and plasmonic devices with doped CdO spanning wavelengths from the ultraviolet to the mid-infrared region.},
doi = {10.1002/adfm.201908377},
journal = {Advanced Functional Materials},
number = 7,
volume = 30,
place = {United States},
year = {2019},
month = {12}
}

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