Myung-Ki Kim Korea Advanced Institute of Science and Technology (South Korea) In-Kag Hwang Chonnam National Univ. (South Korea) Yong-Hee Lee Korea Advanced Institute of Science and Technology (South Korea)
We propose and demonstrate reconfigurable microfiber-coupled photonic crystal (PhC) lasers. In this generic
configuration, the position of a PhC resonator can be defined (and redefined) repeatedly by simply relocating a curved
microfiber along the linear PhC waveguide. In the proximity of the PhC waveguide in contact with the microfiber, the
cutoff frequency (effective index) of the PhC waveguide becomes smaller (larger) than that of a bare PhC waveguide.
Accordingly, when a curved microfiber is in contact with the PhC waveguide, a linear PhC resonator having Gaussianshaped
potential well is formed. Experimentally we confirm the formation of the reconfigurable resonator by observing
laser operation slightly below three available band edges.