Nanoplasmonic Fano resonances: choosing the best regime

Benjamin Gallinet

doi:10.1117/12.2023325

11 September 2013 Nanoplasmonic Fano resonances: choosing the best regime

Benjamin Gallinet

Proceedings Volume 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI; 88090A (2013) https://doi.org/10.1117/12.2023325
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

Abstract

Plasmonic modes with long radiative lifetimes combine strong nanoscale light confinement with a narrow spectral line width carrying the signature of Fano resonances. The interplay between radiative and non-radiative lifetimes of subradiant modes critically determines their optical properties and optimal use in nanoplasmonic applications. Here, it is shown analytically and numerically with the example of a silver nanostructure that the coupling to radiation of a subradiant mode, its radiance, can be classified into three different regimes. The modulation damping is a unitless lineshape parameter which provides direct information on the radiance. In the weak coupling regime, subradiant modes are very sensitive to geometrical displacements and deformations. Strong modulation of their spectral lineshape is also observed. At critical coupling, the radiative and non-radiative decays are balanced and the electromagnetic energy stored in the mode is maximal. For larger coupling, hybridization of the modes may be observed. In general, the classification of the coupling regimes presented here provides a systematic way to choose the most adapted coupling regime for specific nanoplasmonic applications.

Citation Download Citation

Benjamin Gallinet "Nanoplasmonic Fano resonances: choosing the best regime", Proc. SPIE 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI, 88090A (11 September 2013); https://doi.org/10.1117/12.2023325

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