@article{d15427b2997d4ded881a7c90d8ad715f,
title = "Deterministic inverse design of Tamm plasmon thermal emitters with multi-resonant control",
abstract = "Wavelength-selective thermal emitters (WS-EMs) are of interest due to the lack of cost-effective, narrow-band sources in the mid- to long-wave infrared. WS-EMs can be realized via Tamm plasmon polaritons (TPPs) supported by distributed Bragg reflectors on metals. However, the design of multiple resonances is challenging as numerous structural parameters must be optimized simultaneously. Here we use stochastic gradient descent to optimize TPP emitters (TPP-EMs) composed of an aperiodic distributed Bragg reflector deposited on doped cadmium oxide (CdO) film, where layer thicknesses and carrier density are inversely designed. The combination of the aperiodic distributed Bragg reflector with the designable plasma frequency of CdO enables multiple TPP-EM modes to be simultaneously designed with arbitrary spectral control not accessible with metal-based TPPs. Using this approach, we experimentally demonstrated and numerically proposed TPP-EMs exhibiting single or multiple emission bands with designable frequencies, line-widths and amplitudes. This thereby enables lithography-free, wafer-scale WS-EMs that are complementary metal–oxide–semiconductor compatible for applications such as free-space communications and gas sensing.",
author = "Mingze He and Nolen, {J. Ryan} and Josh Nordlander and Angela Cleri and McIlwaine, {Nathaniel S.} and Yucheng Tang and Guanyu Lu and Folland, {Thomas G.} and Landman, {Bennett A.} and Maria, {Jon Paul} and Caldwell, {Joshua D.}",
note = "Funding Information: (4) provided through a Small BusinessTechnologyTransfer programme provided by the the National Science Foundation for support (NSF 1452485). Funding for G.L. was Funding Information: inverse design is from textbooks. As the materials are absorbing and dispersive, TMM calculations performed in this paper are from refs. 35,36 for cross-validation purposes, and codes are offered by N. Passler and A. Paarmann. The dielectric functions of Ge and AlOx are fitted with ellipsometry measurements with WVase software from J.A. Woollam37, and temperature-dependent values are adjusted with reflectance data (Supplementary Section 5). The dielectric function model M.H., J.R.N., J.-P.M., A.C. and J.D.C. gratefully acknowledge support for this work by Office of Naval Research grant N00014-18-1-2107. J.-P.M. and J.N. acknowledge support from the Army Research Office research grant W911NF-16-1-0406. J.N. gratefully acknowledges support from the Department of Defense through the National Defense Science and Engineering Graduate Fellowship Program. Y.T. and B.A.L. thank Funding Information: National Science Foundation, Division of Industrial Innovation and Partnerships (award no. 2014798). T.G.F. was supported by Vanderbilt University through J.D.C.{\textquoteright}s start-up package. We thank the National Institute of Standards and Technology for providing (5) the infrared absorption spectra of chemicals and N. Passler and A. Paarmann of the Fritz Haber Institute for their TMM code35,36 to validate our work. Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Nature Limited.",
year = "2021",
month = dec,
doi = "10.1038/s41563-021-01094-0",
language = "English (US)",
volume = "20",
pages = "1663--1669",
journal = "Nature Materials",
issn = "1476-1122",
publisher = "Nature Publishing Group",
number = "12",
}