Realization of high-Q/V photonic crystal cavities defined by an effective Aubry-André-Harper bichromatic potential

Realization of high-Q/V photonic crystal cavities defined by an effective Aubry-André-Harper bichromatic potential

Simbula, A. (Pavia University)
Schatzl, M. (Johannes Kepler University Linz)
Alpeggiani, F. (TU Delft QN/Kuipers Lab; Pavia University; AMOLF; Kavli institute of nanoscience Delft)
Andreani, L.C. (Pavia University)
Schäffler, F. (Johannes Kepler University Linz)
Fromherz, T. (Johannes Kepler University Linz)
Galli, M. (Pavia University)
Gerace, D. (Pavia University)

2017

We report on the realization of high-Q/V photonic crystal cavities in thin silicon membranes, with resonances around 1.55 μm wavelength. The cavity designs are based on a recently proposed photonic crystal implementation of the Aubry-André-Harper bichromatic potential, defined from the superposition of two one-dimensional lattices with a non-integer ratio between their periodicity constants. In photonic crystal nanocavities, this confinement mechanism is such that optimized figures of merit can be straightforwardly achieved, in particular an ultra-high-Q factor and diffraction-limited mode volume. Several silicon membrane photonic crystal nanocavities have been realized with measured Q-factors in the 1 × 106 range, as evidenced by resonant scattering. The generality of the proposed designs and their easy implementation and scalability make these results particularly interesting for realizing highly performing photonic nanocavities on different material platforms and operational wavelengths.

Photonic crystals
Cavitation
Photonic crystal waveguides
Lattice constants
Optical resonators

http://resolver.tudelft.nl/uuid:4d07525f-6eaf-444f-90f7-50668e662443

https://doi.org/10.1063/1.4979708

2378-0967

APL Photonics, 2 (5)

Institutional Repository

journal article

© 2017 A. Simbula, M. Schatzl, F. Alpeggiani, L.C. Andreani, F. Schäffler, T. Fromherz, M. Galli, D. Gerace