Doping-tunable thermal emission from plasmon polaritons in semiconductor epsilon-near-zero thin films
- Inha Univ., Incheon (Korea, Republic of). Dept. of Physics
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Here, we utilize the unique dispersion properties of leaky plasmon polaritons in epsilon-near-zero (ENZ) thin films to demonstrate thermal radiation control. Owing to its highly flat dispersion above the light line, a thermally excited leaky wave at the ENZ frequency out-couples into free space without any scattering structures, resulting in a narrowband, wide-angle, p-polarized thermal emission spectrum. We demonstrate this idea by measuring angle- and polarization-resolved thermal emission spectra from a single layer of unpatterned, doped semiconductors with deep-subwavelength film thickness (d/λ0 ~ 6 ×10-3, where d is the film thickness and λ0 is the free space wavelength). We show that this semiconductor ENZ film effectively works as a leaky wave thermal radiation antenna, which generates far-field radiation from a thermally excited mode. The use of semiconductors makes the radiation frequency highly tunable by controlling doping densities and also facilitates device integration with other components. Therefore, this leaky plasmon polariton emission from semiconductor ENZ films provides an avenue for on-chip control of thermal radiation.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA); Inha Univ., Incheon (Korea, Republic of); National Research Foundation of Korea (NRF)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1426896
- Report Number(s):
- SAND2014--17532J; 537394
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 105; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
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Doping-tunable thermal emission from plasmon polaritons in semiconductor epsilon-near-zero thin films
Journal Article
·
Mon Sep 29 00:00:00 EDT 2014
· Applied Physics Letters
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OSTI ID:22350779