Plasmonic enhancement and losses in light-emitting quantum-well structures incorporating metallic gratings

Toufik Sadi; Jani Oksanen; Jukka Tulkki

doi:10.1117/12.2038506

7 March 2014 Plasmonic enhancement and losses in light-emitting quantum-well structures incorporating metallic gratings

Toufik Sadi, Jani Oksanen, Jukka Tulkki

Proceedings Volume 8980, Physics and Simulation of Optoelectronic Devices XXII; 89800Z (2014) https://doi.org/10.1117/12.2038506
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

The unique properties of surface plasmons (SPs) are expected to provide a great improvement of light extraction in light-emitting diodes (LEDs). Surface plasmon modes are characterized by a high local density of states, and if scattered by gratings, significantly high emission enhancement is achievable. We investigate the physical role of SPs in improving light extraction from GaN quantum-well (QW) light-emitting structures incorporating metallic grating, by using first-principle theory based on Maxwell's equations and fluctuational electrodynamics. We demonstrate how careful nano-engineering, specifically by choosing the right nano-grating period, can reduce absorption losses and provide optimal enhancement; in the investigated test geometries, light extraction is increased by a factor of four, with the plasmonic losses being reduced from ~ 90% to below ~ 60% thanks to the metallic grating. While the results confirm a strong enhancement and reduction in the plasmonic losses, the overall losses still represent a significant obstacle for plasmonic-enhanced emission. With further optimization of the structure, the grating shapes and the materials, a much larger enhancement and lower losses are expected to be possible.

Citation Download Citation

Toufik Sadi, Jani Oksanen, and Jukka Tulkki "Plasmonic enhancement and losses in light-emitting quantum-well structures incorporating metallic gratings", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 89800Z (7 March 2014); https://doi.org/10.1117/12.2038506

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available