High-Q-preserving coupling between a spiral and a semicircle micro-cavity.
We present an efficient design for direct coupling between a spiral-shaped and a semicircle-shaped microcavity (micro-cavity) as an alternative to traditional evanescent wave coupling for planar integrated photonic technology. We observe the preservation of the high Q-value of the spiral oscillator when coupled to a semicircle under current injection using an AlGaAs single-quantum-well heterostructure. With slight alterations to the directly coupled micro-cavity configuration, such as coupling shape and overlap distance, the number of observed modes and output intensity are changed. AlGaAs and InGaN spiral-shaped microcavities have unidirectional emission normal to the spiral notch.
Chern
G D
GD
Department of Applied Physics, Yale University, CT 06520, USA. gracehern@yahoo.com
Fernandes
G E
GE
Chang
R K
RK
Song
Q
Q
Xu
L
L
Kneissl
M
M
Johnson
N M
NM