Microgear laser

Fujita, Masayuki; Baba, Toshihiko
March 2002
Applied Physics Letters;3/25/2002, Vol. 80 Issue 12, p2051
Academic Journal
A microlaser, microgear, composed of a microdisk and a rotationally symmetric Bragg grating is described. A GaInAsP-InP device with µm radius was fabricated and the room-temperature continuous-wave operation was obtained by photopumping with a low threshold of 17 µW. The experiment clearly demonstrated that the Q factor in a microdisk was enhanced by the microgear due to the minimization of the radiation field. Resonant spectra showed some unique mode characteristics influenced by an elliptical cavity. These results suggest a potential of advanced engineering of whispering-gallery-mode laser with a photonic crystal, the generalized Bragg grating.


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