Open AccessCut-off-based dual-taper reflectors in on-chip hollow waveguides
Author(s) -
M. H. Bitarafan,
C. A. Potts,
R. G. DeCorby
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.005101
Subject(s) - optics , waveguide , materials science , cutoff frequency , reflection (computer programming) , omnidirectional antenna , chip , transmittance , optoelectronics , physics , telecommunications , antenna (radio) , computer science , programming language
We describe back-to-back (dual) tapers embedded within hollow Bragg waveguides clad by omnidirectional Si/SiO 2 -based mirrors, and fabricated using a thin film buckling approach. The back-reflection of light subject to mode cutoff in the narrowed tunnel section results in a short-pass transmission characteristic. Thus, the dual taper can act as a waveguide filter with the upper pass-band edge determined by the lithographically controlled height of the tunnel section. We also report preliminary results on the use of these dual tapers as in-plane reflectors (for operation in the cutoff regime), with potential to enable a novel class of open-access hollow-waveguide microcavities.