All-semiconductor negative-index plasmonic absorbers

S. Law, C. Roberts, T. Kilpatrick, L. Yu, T. Ribaudo, E. A. Shaner, V. Podolskiy, D. Wasserman

Research output: Contribution to journalArticlepeer-review

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Abstract

We demonstrate epitaxially grown all-semiconductor thin-film midinfrared plasmonic absorbers and show that absorption in these structures is linked to the excitation of highly confined negative-index surface plasmon polaritons. Strong (>98%) absorption is experimentally observed, and the spectral position and intensity of the absorption resonances are studied by reflection and transmission spectroscopy. Numerical models as well as an analytical description of the excited guided modes in our structures are presented, showing agreement with experiment. The structures investigated demonstrate a wavelength-flexible, all-semiconductor, plasmonic architecture with potential for both sensing applications and enhanced interaction of midinfrared radiation with integrated semiconductor optoelectronic elements.

Original languageEnglish (US)
Article number017401
JournalPhysical review letters
Volume112
Issue number1
DOIs
StatePublished - Jan 6 2014

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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