Improved quantitative circuit model of realistic patch-based nanoantenna-enabled detectors

Campione, Salvatore; Warne, Larry K.; Goldflam, Michael D.; Peters, David W.; Sinclair, Michael B.

doi:10.1364/josab.35.002144

Improved quantitative circuit model of realistic patch-based nanoantenna-enabled detectors

Journal Article · Thu Aug 16 00:00:00 EDT 2018 · Journal of the Optical Society of America. Part B, Optical Physics

DOI:https://doi.org/10.1364/josab.35.002144· OSTI ID:1465183

^[1]; Warne, Larry K. ^[1]; Goldflam, Michael D. ^[1]; Peters, David W. ^[1]; Sinclair, Michael B. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Improving the sensitivity of infrared detectors is an essential step for future applications, including satellite- and terrestrial-based systems. We investigate nanoantenna-enabled detectors (NEDs) in the infrared, where the nanoantenna arrays play a fundamental role in enhancing the level of absorption within the active material of a photodetector. The design and optimization of nanoantenna-enabled detectors via full-wave simulations is a challenging task given the large parameter space to be explored. Here, we present a fast and accurate fully analytic circuit model of patch-based NEDs. This model allows for the inclusion of real metals, realistic patch thicknesses, non-absorbing spacer layers, the active detector layer, and absorption due to higher-order evanescent modes of the metallic array. We apply the circuit model to the design of NED devices based on Type II superlattice absorbers, and show that we can achieve absorption of ~70% of the incoming energy in subwavelength (~λ/5) absorber layers. In conclusion, the accuracy of the circuit model is verified against full-wave simulations, establishing this model as an efficient design tool to quickly and accurately optimize NED structures.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1465183

Alternate ID(s):: OSTI ID: 1464592

Report Number(s):: SAND--2018-7801J; 665882

Journal Information:: Journal of the Optical Society of America. Part B, Optical Physics, Journal Name: Journal of the Optical Society of America. Part B, Optical Physics Journal Issue: 9 Vol. 35; ISSN JOBPDE; ISSN 0740-3224

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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