Metallic nanorings for broadband, enhanced extraction of light from solid-state emitters

Trojak, O. J., Park, S. I., Song, J. D. and Sapienza, L. (2017) Metallic nanorings for broadband, enhanced extraction of light from solid-state emitters. Applied Physics Letters, 111(2), 021109. (doi: 10.1063/1.4993774)

Abstract

We report on the increased extraction of light emitted by solid-state sources embedded within high refractive index materials. This is achieved by making use of a local lensing effect by sub-micron metallic rings deposited on the sample surface and centered around single emitters. We show enhancements in the intensity of the light emitted by InAs/GaAs single quantum dot lines into free space as high as a factor of 20. Such a device is intrinsically broadband and therefore compatible with any kind of solid-state light source. We foresee the fabrication of metallic rings via scalable techniques, like nano-imprint, and their implementation to improve the emission of classical and quantum light from solid-state sources. Furthermore, while increasing the brightness of the devices, the metallic rings can also act as top contacts for the local application of electric fields for carrier injection or wavelength tuning.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sapienza, Dr Luca
• Authors: Trojak, O. J., Park, S. I., Song, J. D., and Sapienza, L.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118