In the second term of our project the main goal is the exploration of fabrication strategies for defining defects and defect arrays in photonic crystal lasers based on surface-relief-grating structures and the investigation of the properties of the resulting laser structures. Based on the procedure of holographic exposure and the decoration with TiO2 being developed in the previous duration of the program the focus will be shifted towards the subject of defects and defect arrays. The modified surface-relief structures will be coated with active organic semiconductors such as conjugated polymers. Thus novel photonic crystal defect laser sources using organic semiconductors as active gain medium will be fabricated and investigated. The experimental work will be directly accompanied by theoretical work. Our work will mainly address the following issues: - Fabrication of decorated surface relief grating giving rise to first order Bragg diffraction - Development of lithographic procedures for the definition of photonic defects into the TiO2-film - Investigation of the static and dynamic emission properties of 2D photonic crystal defect lasers and defect laser arrays - Multiscale analysis of 2D photonic crystal lasing considering non-Markovian effects. The research will be carried out by a strongly interacting consortium of groups that bring in their expertise in the field of materials science, optoelectronics and theoretical quantum electronics.

Kooperationspartner

Dr. Kurt Busch
Institut für Theorie der Kondensierten Materie

Prof. Joachim Luther
Universität Freiburg