The role of a strong dye absorption in determining the photonic bandgap (PBG) shape of a three-dimensional dyed photonic crystal, fabricated from dyed polystyrene nanospheres, is investigated. When the dye absorption peaks fall on the PBG spectral position, the PBG has a distorted shape, narrow top, and wide bottom. Theoretical analysis shows that the characteristic PBG shape results from two superimposed contributions with distinct origins, i.e., a Bragg reflection and a high reflection associated with the strong dye absorption.
© 2006 Optical Society of America
Original Manuscript: June 13, 2005
Revised Manuscript: October 13, 2005
Manuscript Accepted: November 14, 2005
Na Young Ha, Jeong Weon Wu, and Byoungchoo Park, "Bandgap of a three-dimensional dyed polystyrene photonic crystal from optical absorption," J. Opt. Soc. Am. B 23, 958-962 (2006)