Photocathode performance improvement by plasmonic light trapping in nanostructured metal surfaces

Aleksandr Polyakov; Kevin Thompson; Christoph Senft; Scott Dhuey; Bruce Harteneck; Xiaogan Liang; James P. Schuck; Stefano Cabrini; Weishi Wan; Howard A. Padmore

doi:10.1117/12.894607

7 September 2011 Photocathode performance improvement by plasmonic light trapping in nanostructured metal surfaces

Aleksandr Polyakov, Kevin Thompson, Christoph Senft, Scott Dhuey, Bruce Harteneck, Xiaogan Liang, James P. Schuck, Stefano Cabrini, Weishi Wan, Howard A. Padmore

Author Affiliations +

Proceedings Volume 8094, Nanophotonic Materials VIII; 809407 (2011) https://doi.org/10.1117/12.894607
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

We demonstrate 16 times increase in light absorption nano-structured metal compared to the flat surface by fabricating a subwavelength grating on gold surface. This light-trapping phenomenon can be used in many areas from solar energy conversion to photovoltaics. Here, we describe application to field enhancement in photocathodes where we show theoretically a performance increase of three orders of magnitude over conventional systems. We also describe the fabrication of these devices and present initial optical results.

Citation Download Citation

Aleksandr Polyakov, Kevin Thompson, Christoph Senft, Scott Dhuey, Bruce Harteneck, Xiaogan Liang, James P. Schuck, Stefano Cabrini, Weishi Wan, and Howard A. Padmore "Photocathode performance improvement by plasmonic light trapping in nanostructured metal surfaces", Proc. SPIE 8094, Nanophotonic Materials VIII, 809407 (7 September 2011); https://doi.org/10.1117/12.894607

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