Tailoring the Local Density of Optical States and Directionality of Light Emission by Symmetry Breaking

We present a method to simultaneously engineer the energy-momentum dispersion and the local density of optical states (LDOS). Using vertical symmetry breaking in high-contrast gratings, we enable the mixing of modes with different parities, thus producing hybridized modes with controlled dispersion....

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2019-05, Vol.25 (3), p.1-7
Main Authors: Cueff, Sebastien, Dubois, Florian, Huang, Matthew Shao Ran, Li, Dongfang, Zia, Rashid, Letartre, Xavier, Viktorovitch, Pierre, Nguyen, Hai Son
Format: Article
Language:English
Subjects:
Broken symmetry
Crystal defects
Density
directional emission
Dispersion
Dispersion-engineering
Emitters
Engineering Sciences
Gratings
Gratings (spectra)
high-index contrast grating
Light emission
local density of optical states
metasurface
Micro and nanotechnologies
Microelectronics
Optical mixing
Optics
Photoluminescence
Photonic
photonic crystal
Photonic crystals
Photonics
Silicon
Stimulated emission
Symmetry
symmetry breaking
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a method to simultaneously engineer the energy-momentum dispersion and the local density of optical states (LDOS). Using vertical symmetry breaking in high-contrast gratings, we enable the mixing of modes with different parities, thus producing hybridized modes with controlled dispersion. By tuning geometric parameters, we control the coupling between Bloch modes, leading to flatband, M- and W-shaped dispersion as well as Dirac dispersion. This dispersion-engineering leads to tailored LDOS and we experimentally demonstrate a two order of magnitude enhancement of photoluminescence from weak emitters-defects in silicon-via optical modes with adjustable angle of emission. This vertical symmetry-breaking method could readily be used in various photonic crystals and metasurfaces devices and opens up a new way to strongly boost light emission on-chip and to steer it to arbitrary directions.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2019.2902915