title: Effect of photonic bandgap on luminescence from silicon nanocrystals.
abstract: The modification of the luminescence of silicon nanocrystals experiencing the effect of a photonic bandgap in a 2D photonic crystal was investigated. The time-integrated photoluminescence spectra detected in the plane of the photonic crystal revealed a dip in the light emission corresponding to the wavelength of the bandgap, whose position changes according to the geometry of the prepatterned pillar array. The calculated emission pattern for a pointlike dipole placed in such a structure suggests an inhibition of the spontaneous emission rate at certain directions as a physical reason for the observed modification of luminescence.
authors.affiliation: 1Laboratory of Materials and Semiconductor Physics, Royal Institute of Technology, SE-16440, Electrum 229, Kista-Stockholm, Sweden.
authors.forename: Ilya
authors.initials: I
authors.lastname: Sychugov
authors.forename: Niklas
authors.initials: N
authors.lastname: Elfström
authors.forename: Anders
authors.initials: A
authors.lastname: Hallén
authors.forename: Jan
authors.initials: J
authors.lastname: Linnros
authors.forename: Min
authors.initials: M
authors.lastname: Qiu