Open AccessPhotonic molecules defined by SU-8 photoresist strips on a photonic crystal waveguide
Author(s) -
Stephen A Len,
Frederic S. F. Brossard,
Luke Nuttall,
Jiang Wu,
Jonathan Griffiths,
Robert A. Taylor
Publication year - 2018
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.26.032332
Subject(s) - strips , photonic crystal , photoresist , photonics , optics , materials science , coupling (piping) , waveguide , optoelectronics , laser , yablonovite , excitation , photonic integrated circuit , physics , layer (electronics) , nanotechnology , quantum mechanics , metallurgy , composite material
We present experimental and numerical investigations of photonic molecules obtained from laser patterned SU-8 photoresist strips on photonic crystal waveguides. Properties of cavities defined by a single strip are investigated and we show that two adjacent strips on a waveguide form a pair of optically coupled cavities. Simulation results and micro-photoluminescence mapping measurements demonstrate that the coupling strength is tunable by controlling the separation between the strips. Confocal mapping with decoupled collection and excitation points is used to explicitly show coupling between two cavities of a photonic molecule.