Increase of Q-factor in photonic crystal H1-defect nanocavities after closing of photonic bandgap with optimal slab thickness | Zendy

Aniwat Tandaechanurat | Zendy; Satoshi Iwamoto | Zendy; Masahiro Nomura | Zendy; Naoto Kumagai | Zendy; Yasuhiko Arakawa | Zendy

Open Access

Increase of Q-factor in photonic crystal H1-defect nanocavities after closing of photonic bandgap with optimal slab thickness

Author(s) -

Aniwat Tandaechanurat,

Satoshi Iwamoto,

Masahiro Nomura,

Naoto Kumagai,

Yasuhiko Arakawa

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.16.000448

Subject(s) - photonic crystal , slab , yablonovite , q factor , optics , materials science , photonics , band gap , photonic integrated circuit , optoelectronics , coupling (piping) , physics , resonator , metallurgy , geophysics

We investigate the dependence of quality factor Q of dipole modes in photonic crystal H1-defect nanocavity on the slab thickness and observe an increase of Q even after closing of the photonic bandgap both in numerical simulation and experimentation. This counter intuitive behavior results from the weak coupling between the cavity mode and the 2nd-guided mode in the photonic crystal slab. This is confirmed by computing the overlap between them in the momentum space.

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