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1 August 2021 Optical losses in THz arrays of patch-antenna microcavities coupled to subwavelength wires
Joel Pérez-Urquizo, Julien Madéo, Keshav M. Dani
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Proceedings Volume 11827, Terahertz Emitters, Receivers, and Applications XII; 118270A (2021) https://doi.org/10.1117/12.2593095
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States
Abstract
In this work, we numerically study the losses and quality factors of arrays of square patch-antenna microcavities interconnected with subwavelength wires designed for terahertz (THz) emission. In general, the array geometry provides larger quality factors than the single resonator. Moreover, when the patch-antennas are coupled to subwavelength wires, the intracavity field distribution of the fundamental mode TM01 extends spatially into the direction of the wires, enhancing significantly the quality factors. By replacing the lossy materials by perfect lossless elements in our model, we extract the radiative and non-radiative contributions to the total losses in the system, allowing the estimation of the photon extraction efficiencies, found to be of as high as 90%.
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Joel Pérez-Urquizo, Julien Madéo, and Keshav M. Dani "Optical losses in THz arrays of patch-antenna microcavities coupled to subwavelength wires", Proc. SPIE 11827, Terahertz Emitters, Receivers, and Applications XII, 118270A (1 August 2021); https://doi.org/10.1117/12.2593095
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KEYWORDS
Optical microcavities
Terahertz radiation
Resonators
Polarization
Reflectivity
Quantum cascade lasers
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