Back to Search
Start Over
Physics of unbounded, broadband absorption/gain efficiency in plasmonic nanoparticles.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . May2013, Vol. 87 Issue 20, p205418-1-205418-9. 9p. - Publication Year :
- 2013
-
Abstract
- Anomalous resonances in properly shaped plasmonic nanostructures can in principle lead to infinite absorption/gain efficiencies over broad bandwidths of operation. By developing a closed-form analytical solution for the fields scattered by conjoined hemicylinders, we outline the fundamental physics behind these phenomena, associated with broadband adiabatic focusing of surface plasmons at the nanoscale. Over a continuous frequency range, our proposed composite nanostructure shows finite amount of absorption/amplification even in the limit of infinitesimally small intrinsic material loss/gain. Detailed physical insights are provided to justify the nature of this apparent paradox, and its counterintuitive behavior is discussed for potential applications in nonlinear optics, spasing, sensing, and energy-harvesting devices. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ABSORPTION
*NANOPARTICLES
*NANOSTRUCTURES
*BANDWIDTHS
*SURFACE plasmons
Subjects
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 87
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 88847795
- Full Text :
- https://doi.org/10.1103/PhysRevB.87.205418