Splitting of absorptance peaks in absorbing multilayer backed by a periodically corrugated metallic reflector

Mikhail V.S. Huba, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The excitation of modes of an open-face slab waveguide by light incident on a thin-film photovoltaic solar cell with a periodically corrugated metal backreflector is indicated by peaks in the absorptance spectrum. An absorptance peak due to the excitation of a waveguide mode (WGM) can split as the corrugation depth increases. The splitting can be explained in terms of the wavenumbers of the WGMs of two open-face slab waveguides with different thicknesses of the semiconductor layer. The splitting of short-wavelength peaks occurs for smaller corrugation depths than the splitting of long-wavelength peaks, suggesting that the corrugations need not be very deep for optimal absorption of solar photons.

Original languageEnglish (US)
Pages (from-to)779-784
Number of pages6
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume33
Issue number4
DOIs
StatePublished - Apr 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition

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