Open AccessWavelength and loss splitting in directly coupled photonic-crystal defect microcavities
Author(s) -
Kirill A. Atlasov,
K. F. Karlsson,
A. Rudra,
B. Dwir,
E. Kapon
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.016255
Subject(s) - resonator , photonic crystal , optics , coupling (piping) , wavelength , materials science , antisymmetric relation , optoelectronics , coupled mode theory , physics , refractive index , metallurgy , mathematical physics
Coupling between photonic-crystal defect microcavities is observed to result in a splitting not only of the mode wavelength but also of the modal loss. It is discussed that the characteristics of the loss splitting may have an important impact on the optical energy transfer between the coupled resonators. The loss splitting--given by the imaginary part of the coupling strength--is found to arise from the difference in diffractive out-of-plane radiation losses of the symmetric and the antisymmetric modes of the coupled system. An approach to control the splitting via coupling barrier engineering is presented.