Plasmon-enhanced absorption and transmission in spherical Bragg resonators

Miriam Deutsch; Keisuke Hasegawa; Charles Rohde

doi:10.1117/12.646857

24 February 2006 Plasmon-enhanced absorption and transmission in spherical Bragg resonators

Miriam Deutsch, Keisuke Hasegawa, Charles Rohde

Proceedings Volume 6123, Integrated Optics: Devices, Materials, and Technologies X; 612307 (2006) https://doi.org/10.1117/12.646857
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

Abstract

We present a theoretical study of the dispersion relation of surface plasmon resonances of mesoscopic metal-dielectric-metal microspheres. These are spherically symmetric Bragg resonators comprising thin, alternating layers of dielectric and metal shells around spherical metal cores. By analyzing the solutions to Maxwell's equations, we obtain a simple geometric condition for which the system exhibits a band of surface plasmon modes whose resonant frequencies are weakly dependent on the multipole number. Using a modified Mie calculation, we investigate the effect of this flat-dispersion band on the absorption and scattering cross-sections of the layered particle. We find that a large number of modes belonging to this band can be excited simultaneously by a plane wave, thus enhancing the absorption cross-section. Moreover, we observe a narrow transmission resonance due to the metallodielectric shells behaving as a transparent coating in a narrow spectral range. We demonstrate that the enhanced absorption and transmission of the sphere are geometrically tunable over the entire visible range.

Citation Download Citation

Miriam Deutsch, Keisuke Hasegawa, and Charles Rohde "Plasmon-enhanced absorption and transmission in spherical Bragg resonators", Proc. SPIE 6123, Integrated Optics: Devices, Materials, and Technologies X, 612307 (24 February 2006); https://doi.org/10.1117/12.646857

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