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Title: Coupled surface plasmon–phonon polariton nanocavity arrays for enhanced mid-infrared absorption

Abstract

Resonant optical cavities are essential components in mid-infrared applications. However, typical film-type cavities require multilayer stacks with a micron-thick spacer due to mid-infrared wavelengths, and their performance is limited by narrow frequency tunability and angular sensitivity. We propose and experimentally demonstrate the subwavelength-scale (≈λ0/150) resonant nanocavity arrays that enhance the absorption spectrum of the device in the mid-infrared (10–12 microns) via excitation of coupled surface plasmon–phonon polaritons. The proposed metal–insulator–polar dielectric (gold–silicon–silicon carbide) structure supports a guided mode of the coupled surface polaritons in the lateral direction while vertically confining the mid-infrared wave within the 80 nm thick dielectric spacer. In particular, the subwavelength-scale (≈λ0/10) gratings are imposed to form Fabry–Pérot cavity arrays displaying angle-insensitive and frequency-tunable absorption of up to 80% of the optical power in the mid-infrared. Our work should benefit diverse mid-infrared applications and novel designs of polariton-based photonic devices.

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [4]; ORCiD logo [5]; ORCiD logo [1]
  1. Texas Tech Univ., Lubbock, TX (United States); University of Texas Rio Grande Valley, Brownsville, TX (United States)
  2. Univ. of Houston, TX (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Texas Tech Univ., Lubbock, TX (United States)
  4. Univ. of Houston, TX (United States)
  5. Texas Tech Univ., Lubbock, TX (United States); Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
OSTI Identifier:
1893729
Report Number(s):
FERMILAB-PUB-22-768-SQMS
Journal ID: ISSN 2192-8614; oai:inspirehep.net:2167218; TRN: US2310225
Grant/Contract Number:  
AC02-07CH11359; 89233218CNA000001; NA0003525; ECCS-2025227
Resource Type:
Accepted Manuscript
Journal Name:
Nanophotonics (Online)
Additional Journal Information:
Journal Name: Nanophotonics (Online); Journal Volume: 11; Journal Issue: 20; Journal ID: ISSN 2192-8614
Publisher:
de Gruyter
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; coupled plasmon; phonon polariton mode; enhanced optical power absorption; Fabry-Perot cavity array; propagating surface phonon polaritons

Citation Formats

Kachiraju, Satya R., Nekrashevich, Ivan, Ahmad, Imtiaz, Farooq, Hira, Chang, Long, Kim, Sangsik, and Kim, Myoung-Hwan. Coupled surface plasmon–phonon polariton nanocavity arrays for enhanced mid-infrared absorption. United States: N. p., 2022. Web. doi:10.1515/nanoph-2022-0339.
Kachiraju, Satya R., Nekrashevich, Ivan, Ahmad, Imtiaz, Farooq, Hira, Chang, Long, Kim, Sangsik, & Kim, Myoung-Hwan. Coupled surface plasmon–phonon polariton nanocavity arrays for enhanced mid-infrared absorption. United States. https://doi.org/10.1515/nanoph-2022-0339
Kachiraju, Satya R., Nekrashevich, Ivan, Ahmad, Imtiaz, Farooq, Hira, Chang, Long, Kim, Sangsik, and Kim, Myoung-Hwan. Mon . "Coupled surface plasmon–phonon polariton nanocavity arrays for enhanced mid-infrared absorption". United States. https://doi.org/10.1515/nanoph-2022-0339. https://www.osti.gov/servlets/purl/1893729.
@article{osti_1893729,
title = {Coupled surface plasmon–phonon polariton nanocavity arrays for enhanced mid-infrared absorption},
author = {Kachiraju, Satya R. and Nekrashevich, Ivan and Ahmad, Imtiaz and Farooq, Hira and Chang, Long and Kim, Sangsik and Kim, Myoung-Hwan},
abstractNote = {Resonant optical cavities are essential components in mid-infrared applications. However, typical film-type cavities require multilayer stacks with a micron-thick spacer due to mid-infrared wavelengths, and their performance is limited by narrow frequency tunability and angular sensitivity. We propose and experimentally demonstrate the subwavelength-scale (≈λ0/150) resonant nanocavity arrays that enhance the absorption spectrum of the device in the mid-infrared (10–12 microns) via excitation of coupled surface plasmon–phonon polaritons. The proposed metal–insulator–polar dielectric (gold–silicon–silicon carbide) structure supports a guided mode of the coupled surface polaritons in the lateral direction while vertically confining the mid-infrared wave within the 80 nm thick dielectric spacer. In particular, the subwavelength-scale (≈λ0/10) gratings are imposed to form Fabry–Pérot cavity arrays displaying angle-insensitive and frequency-tunable absorption of up to 80% of the optical power in the mid-infrared. Our work should benefit diverse mid-infrared applications and novel designs of polariton-based photonic devices.},
doi = {10.1515/nanoph-2022-0339},
journal = {Nanophotonics (Online)},
number = 20,
volume = 11,
place = {United States},
year = {Mon Sep 12 00:00:00 EDT 2022},
month = {Mon Sep 12 00:00:00 EDT 2022}
}

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