Next Article in Journal
Multiferroic Compounds with Double-Perovskite Structures
Next Article in Special Issue
Electro-Optic Effects in Colloidal Dispersion of Metal Nano-Rods in Dielectric Fluid
Previous Article in Journal
1H Nuclear Magnetic Resonance of Lodgepole Pine Wood Chips Affected by the Mountain Pine Beetle
Previous Article in Special Issue
Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations
Materials 2011, 4(1), 141-152; doi:10.3390/ma4010141

Emission Enhancement in a Plasmonic Waveguide at Cut-Off

1,*  and 2
1 Department of Electrical and Computer Engineering, University of Texas at Austin, 1 University Station C0803, Austin, TX 78712, USA 2 Department of Electrical and Systems Engineering, University of Pennsylvania, 200 South 33rd St., Philadelphia, PA 19104, USA
* Author to whom correspondence should be addressed.
Received: 29 November 2010 / Revised: 20 December 2010 / Accepted: 21 December 2010 / Published: 4 January 2011
(This article belongs to the Special Issue Next Wave of Metamaterials)
View Full-Text   |   Download PDF [792 KB, uploaded 4 January 2011]   |   Browse Figures


Enhancement of molecular emission is usually obtained by coupling small optical emitters with external resonant structures and systems, as first established by Purcell several decades ago, and verified in several recent investigations using molecules or quantum dots coupled with plasmonic nanoantennas. Here we theoretically investigate in detail a different mechanism for emission enhancement, based on our recent idea of a plasmonic nanolauncher [Phys. Rev. Lett. 2009, 103, 043902], i.e., a metamaterial-inspired ultranarrow waveguide channel operating near its cut-off frequency. Such system is not necessarily at resonance, but its peculiar operation may provide enhanced emission over a relatively broad physical area, which may allow enhancement of emission independent of the position of an individual or of a group of molecules along such plasmonic channel, and the possibility to bend and route the emitted energy with large flexibility. We present here extensive theoretical and numerical results that confirm this intuition and may envision a novel method for molecular emission enhancement at the nanoscale, with more flexibility than the conventional Purcell resonance techniques.
Keywords: plasmonics; metamaterials; molecular emission plasmonics; metamaterials; molecular emission
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
MDPI and ACS Style

Alù, A.; Engheta, N. Emission Enhancement in a Plasmonic Waveguide at Cut-Off. Materials 2011, 4, 141-152.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here


[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert