Chemosorption-related shift of a photonic bandgap in photoconductive ZnO inverse opal

Worawut Khunsin, Sergei G. Romanov, Michael Scharrer, Larry K. Aagesen, Robert P.H. Chang, Clivia M.Sotomayor Torres

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A change of up to 40% of the relative transmission at the photonic bandgap edge has been observed in photoconductive inverted ZnO opals under ultraviolet laser irradiation. This effect has been related to the irradiation-stimulated change of the refraction index of the photonic crystal. The desorption (chemosorption) of oxygen molecules on the surface of the ZnO backbone leading to destruction (formation) of a depletion layer at the ZnO surface has been suggested as the mechanism responsible for the slow variation of polarizability of the inverted ZnO opal.

Original languageEnglish (US)
Pages (from-to)461-463
Number of pages3
JournalOptics Letters
Issue number5
StatePublished - Mar 1 2008

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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