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Indexed by:期刊论文

Date of Publication:2008-06-02

Journal:APPLIED PHYSICS LETTERS

Included Journals:SCIE、EI

Volume:92

Issue:22

ISSN No.:0003-6951

Abstract:We report on the characterization of low threshold second-order organic photonic crystal distributed feedback laser based on SiN with hexagonal lattice. SiN can increase the index contrast in the photonic crystal distributed feedback as well as the confinement in the waveguide which results in a decrease in the threshold. Low threshold energy of 0.65 kW/cm(2) and full width at half maximum of 0.9 nm were achieved in lasers. As a result, we observe surface-emitting lasing action and hexagonal emission pattern of side beams whose direction slightly deviates from the normal. We explain the feedback mechanisms by using semiclassical laser theory. (C) 2008 American Institute of Physics.