Lasing in hybrid metal-Bragg nanocavities.
We report room-temperature lasing from an optically pumped subwavelength-scale cylindrical InGaAsP pillar surrounded by circular Bragg reflectors on a metal substrate with a dielectric spacer layer. By taking advantage of wide in-plane photonic bandgaps and proper vertical antiresonances, three dielectric Bragg pairs produce a sufficient optical feedback capable of low threshold lasing from the fundamental TE011 mode. A large spontaneous emission coupling into the lasing mode is obtained from the cavity-enhanced Purcell effects and effective suppression of nonlasing modes.
Department of Electrical Engineering, KAIST, Daejeon, South Korea.
Jong-Bum
JB
You
Kyungmook
K
Kwon
Wook-Jae
WJ
Lee
Jaeho
J
Shim
Dongshik
D
Won
Youngho
Y
Jung
Byounghun
B
Park
Kyoungsik
K
Yu