Title :
Unidirectional, Efficiency-Controlled Coupling from Microcavity Using Reflection Feedback
Author :
Hwang, In-Kag ; Lee, Yong-Hee
Author_Institution :
Dept. of Phys., Chonnam Nat. Univ., Gwangju
Abstract :
We propose a microcavity-to-waveguide side coupling system with a reflector at one end of the waveguide for the feedback. Using this system, one can get a unidirectional output from a microcavity-based light emitter, where the output coupling efficiency and the cavity loss can be enhanced or suppressed through tuning optical phase of the feedback. Theoretical calculations are confirmed by finite-difference time domain (FDTD) simulation of the coupling between a photonic crystal cavity and a microfiber with a perfect mirror attached. Unidirectional coupling from the photonic crystal cavity to the fiber with efficiency of 90% is demonstrated in the simulation
Keywords :
finite difference time-domain analysis; light reflection; micro-optics; microcavities; mirrors; optical feedback; optical fibre couplers; optical losses; photonic crystals; cavity loss; efficiency-controlled coupling; finite-difference time domain simulation; light emitter; microcavity; microcavity-to-waveguide side coupling system; microfiber; optical phase tuning; perfect mirror; photonic crystal cavity; reflection feedback; unidirectional coupling; waveguide reflector; Finite difference methods; Light emitting diodes; Microcavities; Optical coupling; Optical feedback; Optical losses; Optical reflection; Optical waveguide theory; Optical waveguides; Photonic crystals; Microresonators; optical coupling; photonic crystal;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2007.893080
