Long-wavelength infrared surface plasmons on Ga-doped ZnO films
excited via 2D hole arrays for extraordinary optical transmission

Justin W. Cleary; Nima Nader Esfahani; Shivashankar Vangala; Junpeng Guo; Joshua R. Hendrickson; Kevin D. Leedy; Darren Thomson; David C. Look

doi:10.1117/12.2022278

11 September 2013 Long-wavelength infrared surface plasmons on Ga-doped ZnO films excited via 2D hole arrays for extraordinary optical transmission

Justin W. Cleary, Nima Nader Esfahani, Shivashankar Vangala, Junpeng Guo, Joshua R. Hendrickson, Kevin D. Leedy, Darren Thomson, David C. Look

Author Affiliations +

Proceedings Volume 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI; 88090L (2013) https://doi.org/10.1117/12.2022278
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

Abstract

Extraordinary optical transmission (EOT) through highly conductive ZnO films with sub-wavelength hole arrays is investigated in the long-wavelength infrared regime. EOT is facilitated by the excitation of surface plasmon polaritons (SPPs) and can be tuned utilizing the physical structure size such as period. Pulse laser deposited Ga-doped ZnO has been shown to have fluctuations in optical and electrical parameters based on fabrication techniques, providing a complimentary tuning means. The sub-wavelength 2D hole arrays are fabricated in the Ga-doped ZnO films via standard lithography and etching processes. Optical reflection measurements completed with a microscope coupled FTIR system contain absorption resonances that are in agreement with analytical theories for excitation of SPPs on 2D structures. EOT through Ga-doped ZnO is numerically demonstrated at wavelengths where SPPs are excited. This highly conductive ZnO EOT structure may prove useful in novel integrated components such as tunable biosensors or surface plasmon coupling mechanisms.

Citation Download Citation

Justin W. Cleary, Nima Nader Esfahani, Shivashankar Vangala, Junpeng Guo, Joshua R. Hendrickson, Kevin D. Leedy, Darren Thomson, and David C. Look "Long-wavelength infrared surface plasmons on Ga-doped ZnO films excited via 2D hole arrays for extraordinary optical transmission", Proc. SPIE 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI, 88090L (11 September 2013); https://doi.org/10.1117/12.2022278

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