Self-Similar Nanocavity Design with Ultrasmall Mode Volume for Single-Photon Nonlinearities
Abstract
We propose a photonic crystal nanocavity design with self-similar electromagnetic boundary conditions, achieving ultrasmall mode volume (Veff). The electric energy density of a cavity mode can be maximized in the air or dielectric region, depending on the choice of boundary conditions. We illustrate the design concept with a silicon-air one-dimensional photon crystal cavity that reaches an ultrasmall mode volume of Veff∼7.01 ×10-5λ3 at λ ∼1550 nm . We show that the extreme light concentration in our design can enable ultrastrong Kerr nonlinearities, even at the single-photon level. These features open new directions in cavity quantum electrodynamics, spectroscopy, and quantum nonlinear optics.
- Publication:
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Physical Review Letters
- Pub Date:
- June 2017
- DOI:
- Bibcode:
- 2017PhRvL.118v3605C