Use of ultrafast-laser-driven microexplosional for fabricating three-dimensional void-based diamond-lattice photonic crystals in a solid polymer material.
Micro-sized void spheres are successfully generated in a solid polymer by use of a tightly focused femtosecond laser beam from a high-repetition-rate laser oscillator. Confocal reflection images show that the void spheres are longitudinal rotational symmetric ellipsoids with a ratio of long to short axes of approximately 1.5. Layers of void spheres are then stacked to create three-dimensional diamond-lattice photonic crystals. Three gaps are observed in the [100] direction with a suppression rate of the second gap of up to approximately 75% for a 32-layer structure. The observed first- and second-order gaps shift to longer and shorter wavelengths, respectively, as the angle of incidence increases.
Zhou
Guangyong
G
Centre for Micro-Photonics and Centre for Ultra-high Bandwidth Devices for Optical Systems, School of Biophysical Sciences and Electrical Engineering, Swinburne University of Technology, Hawthorn, Victoria, Australia.
Ventura
Michael James
MJ
Vanner
Michael Ross
MR
Gu
Min
M