Photonic Crystal Devices in Silicon Photonics

In this paper, we review the history of 2-D photonic crystal slabs with a focus on point-defect cavities that can simultaneously realize ultrasmall modal volumes and ultrahigh quality factors. An important design concept to suppress radiation loss is introduced: the envelope of the cavity mode field...

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Bibliographic Details
Published in:Proceedings of the IEEE 2018-12, Vol.106 (12), p.2183-2195
Main Authors: Asano, Takashi, Noda, Susumu
Format: Article
Language:English
Subjects:
Cavity resonators
Crystal defects
Design factors
Heterostructures
Holes
Optical waveguides
Photon manipulation
photonic crystal slab
Photonic crystals
Photonics
Photons
Q-factor
Quantum theory
Raman lasers
Si Raman laser
Silicon
ultrasmall optical cavity
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Summary:In this paper, we review the history of 2-D photonic crystal slabs with a focus on point-defect cavities that can simultaneously realize ultrasmall modal volumes and ultrahigh quality factors. An important design concept to suppress radiation loss is introduced: the envelope of the cavity mode field should have no abrupt changes and should ideally follow a Gaussian function. Cubic-wavelength-order modal volumes, with experimental Q factors exceeding 11000000, are obtained by tailoring the envelope functions using heterostructure nanocavities. We also discuss light/photon manipulation techniques, which are enabled by the emergence of high-Q photonic crystal nanocavities, including ultracompact channel add/drop filters, ultralow-threshold silicon nanocavity Raman lasers, and strong coupling between distant nanocavities via the adiabatic transfer of photons.
ISSN:0018-9219
1558-2256
DOI:10.1109/JPROC.2018.2853197