title: Higher order modes in photonic crystal slabs.
abstract: We present a detailed investigation of higher order modes in photonic crystal slabs. In such structures the resonances exhibit a blue-shift compared to an ideal two-dimensional photonic crystal, which depends on the order of the slab mode and the polarization. By fabricating a series of photonic crystal slab photo detecting devices, with varying ratios of slab thickness to photonic crystal lattice constant, we are able to distinguish between 0th and 1st order slab modes as well as the polarization from the shift of resonances in the photocurrent spectra. This method complements the photonic band structure mapping technique for characterization of photonic crystal slabs.
authors.affiliation: Center for Micro- and Nanostructures, Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria. roman.gansch@tuwien.ac.at
authors.forename: Roman
authors.initials: R
authors.lastname: Gansch
authors.forename: Stefan
authors.initials: S
authors.lastname: Kalchmair
authors.forename: Hermann
authors.initials: H
authors.lastname: Detz
authors.forename: Aaron M
authors.initials: AM
authors.lastname: Andrews
authors.forename: Pavel
authors.initials: P
authors.lastname: Klang
authors.forename: Werner
authors.initials: W
authors.lastname: Schrenk
authors.forename: Gottfried
authors.initials: G
authors.lastname: Strasser