TY - GEN
T1 - Coupled cavities and band-edge slow-light effects in periodic waveguides
AU - Sukhorukov, Andrey A.
AU - Ha, Sangwoo
AU - Lavrinenko, Andrei V.
AU - Kivshar, Yuri S.
PY - 2010
Y1 - 2010
N2 - We demonstrate, theoretically and experimentally, that the modes of coupled cavities created in periodic waveguides can depend critically on the lateral shift between the cavities. In the absence of such shift, the modes feature symmetric or antisymmetric profiles, and their frequency splitting generally increases as the cavities are brought closer. We show that the longitudinal shift enables flexible control over the fundamental modes, which frequency detuning can be reduced down to zero. Our coupled-mode theory analysis reveals an intrinsic link between the mode tuning and the transformation of slow-light dispersion at the photonic band-edge. We illustrate our approach through direct numerical modelling of cavities created in arrays of dielectric rods, nanobeam structures, and two-dimensional photonic-crystal waveguides. We also present experimental results for coupled rod cavities confirming our predictions.
AB - We demonstrate, theoretically and experimentally, that the modes of coupled cavities created in periodic waveguides can depend critically on the lateral shift between the cavities. In the absence of such shift, the modes feature symmetric or antisymmetric profiles, and their frequency splitting generally increases as the cavities are brought closer. We show that the longitudinal shift enables flexible control over the fundamental modes, which frequency detuning can be reduced down to zero. Our coupled-mode theory analysis reveals an intrinsic link between the mode tuning and the transformation of slow-light dispersion at the photonic band-edge. We illustrate our approach through direct numerical modelling of cavities created in arrays of dielectric rods, nanobeam structures, and two-dimensional photonic-crystal waveguides. We also present experimental results for coupled rod cavities confirming our predictions.
KW - Photonic crystal
KW - Side-coupled cavities
KW - Slow light
UR - http://www.scopus.com/inward/record.url?scp=77951679953&partnerID=8YFLogxK
U2 - 10.1117/12.848666
DO - 10.1117/12.848666
M3 - Conference contribution
SN - 9780819480088
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Advances in Slow and Fast Light III
T2 - Advances in Slow and Fast Light III
Y2 - 25 January 2010 through 26 January 2010
ER -