title: Chemosorption-related shift of a photonic bandgap in photoconductive ZnO inverse opal.
abstract: 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.
authors.affiliation: Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland.
authors.forename: Worawut
authors.initials: W
authors.lastname: Khunsin
authors.forename: Sergei G
authors.initials: SG
authors.lastname: Romanov
authors.forename: Michael
authors.initials: M
authors.lastname: Scharrer
authors.forename: Larry K
authors.initials: LK
authors.lastname: Aagesen
authors.forename: Robert P H
authors.initials: RP
authors.lastname: Chang
authors.forename: Clivia M
authors.initials: CM
authors.lastname: Sotomayor Torres