Work

Observation of Cartesian light propagation through a three-dimensional cavity superlattice in a silicon photonic band gap crystal

Year: 2024

Type: article

Abstract: We experimentally investigate peculiar light propagation inside a three-dimensional (3D) superlattice of resonant cavities that are confined within a 3D photonic band gap. To this end, we fabricated 3D diamondlike photonic crystals from silicon with a broad 3D band gap in the near-infrared and doped them with a periodic array of point defects. In position-resolved reflectivity and scattering microscopy, we observe narrow spectral features that match well with superlattice bands in band structures computed with the plane-wave expansion. The cavities are coupled in all three dimensions when they are closely spaced ( a SL ≤ 3 a ) , and uncoupled when they are further apart. The superlattice bands correspond to light that hops in high-symmetry directions in 3D (“Cartesian light”) that opens applications in 3D photonic networks, 3D Anderson localization of light, and future 3D quantum photonic networks. Published by the American Physical Society 2024

Source: Physical Review Research

DOI: 10.1103/physrevresearch.6.043235

Authors: Manashee Adhikary, Marek Kozoň, Ravitej Uppu, Willem L. Vos

Institution: University of Twente

Language: English

Topic: Photonic Crystals and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: Toegepaste en Technische Wetenschappen, NWO, Technische Universiteit Delft, Nederlandse Organisatie voor Wetenschappelijk Onderzoek