Photonic-Crystal Lasers with Double-Lattice Photonic- Crystal Resonators

摘要

Achieving high brightness, defined as optical power per unit area per unit solid angle, of semiconductor lasers is important for various applications including direct-laser material processing and light detection and ranging (LiDAR) for next-generation smart production and mobility. Here, we report on our recent results of photonic crystal lasers with a double-lattice photonic-crystal resonator, where two photonic lattice groups separated by one-quarter wavelength in the x and y directions are superimposed. With this resonator, a high power and a very narrow-divergence beam with a brightness of over 300MWcm~(-2)sr~(-1) is obtained.