Sandia Corporation

National Technology & Engineering Solutions of Sandia, LLC

University of Exeter

Ganapathi Subramanian Subramania

Qiming Li

Igal Brener

George T Wang

Arthur J Fischer

Jeremy Benjamin Wright

Stavroula Foteinopoulou

A structure for broadband light funneling comprises a two-dimensional periodic array of connected ultrasubwavelength apertures, each aperture comprising a large sub-aperture that aids in the coupling of the incoming incident light and a small sub-aperture that funnels a significant fraction of the incident light power. The structure possesses all the capabilities of prior extraordinary optical transmission platforms, yet operates nonresonantly on a distinctly different mechanism. The structure demonstrates efficient ultrabroadband funneling of optical power confined in an area as small as &#x2dc;(&#x3bb;/500), where optical fields are enhanced, thus exhibiting functional possibilities beyond resonant platforms.

Broadband light funneling in ultrasubwavelength channels having periodic connected unfilled apertures

A multicolor photonic crystal laser array comprises pixels of monolithically grown gain sections each with a different emission center wavelength. As an example, two-dimensional surface-emitting photonic crystal lasers comprising broad gain-bandwidth III-nitride multiple quantum well axial heterostructures were fabricated using a novel top-down nanowire fabrication method. Single-mode lasing was obtained in the blue-violet spectral region with 60 nm of tuning (or 16% of the nominal center wavelength) that was determined purely by the photonic crystal geometry. This approach can be extended to cover the entire visible spectrum.

Multicolor photonic crystal laser array

A volume-scalable, high-brightness, electrically driven visible light source comprises a three-dimensional photonic crystal (3DPC) comprising one or more direct bandgap semiconductors. The improved light emission performance of the invention is achieved based on the enhancement of radiative emission of light emitters placed inside a 3DPC due to the strong modification of the photonic density-of-states engendered by the 3DPC.

Volume-scalable high-brightness three-dimensional visible light source

Growing community of inventors

Albuquerque, NM, United States of America

Ganapathi Subramanian Subramania