Coupling of localized surface plasmons to intersubband transitions in CdO/GaAs

Adrian Hierro; Eduardo Martinez Castellano; Julen Tamayo-Arriola; Alicia Gonzalo; Lazar Stanojević; Jose M. Ulloa; Oleksii Klymov; Javier Yeste; Said Agouram; Elias Muñoz; Vicente Muñoz-Sanjose; Miguel Montes Bajo

doi:10.1117/12.2615766

5 March 2022 Coupling of localized surface plasmons to intersubband transitions in CdO/GaAs

Adrian Hierro, Eduardo Martinez Castellano, Julen Tamayo-Arriola, Alicia Gonzalo, Lazar Stanojević, Jose M. Ulloa, Oleksii Klymov, Javier Yeste, Said Agouram, Elias Muñoz, Vicente Muñoz-Sanjose, Miguel Montes Bajo

Author Affiliations +

Proceedings Volume 12002, Oxide-based Materials and Devices XIII; 1200203 (2022) https://doi.org/10.1117/12.2615766
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We show here that Cd(Zn)O can be deposited on GaAs by MOCVD forming nanoparticles with a hemispherical shape. These nanoparticles maintain the key characteristics from a CdO film: very high plasma frequency and very low losses, hence retaining the strong plasmonic character. As a result of this, when illuminated with infrared light, two localized surface plasmon (LSP) modes are excited at 2.7 and 5.3 microns, and the electric field is heavily amplified in the underlying GaAs substrate. Moreover, their hemispherical geometry allows them to partially change the orientation of the field, creating a component perpendicular to the surface. We prove the coupling between the CdO LSPs and the intersubband transitions from a multiple QW structure, where the absorption is largely enhanced for p-polarized electric fields, and it is observed even under normal incidence conditions.

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Citation Download Citation

Adrian Hierro, Eduardo Martinez Castellano, Julen Tamayo-Arriola, Alicia Gonzalo, Lazar Stanojević, Jose M. Ulloa, Oleksii Klymov, Javier Yeste, Said Agouram, Elias Muñoz, Vicente Muñoz-Sanjose, and Miguel Montes Bajo "Coupling of localized surface plasmons to intersubband transitions in CdO/GaAs", Proc. SPIE 12002, Oxide-based Materials and Devices XIII, 1200203 (5 March 2022); https://doi.org/10.1117/12.2615766

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