104. STRONGLY ENHANCED FLUORESCENCE DECAY RATES ON MULTILAYERED PLASMONIC METAMATERIALS

Department: Electrical & Computer Engineering
Research Institute Affiliation: Center for Magnetic Recording Research (CMRR)
Faculty Advisor(s): Zhaowei Liu | Eric Fullerton

Primary Student
Name: Danyong Lu
Email: d9lu@ucsd.edu
Phone: 858-534-5473
Grad Year: 2014

Abstract
We study strongly enhanced fluorescence decay rates on Ag / Si multilayered plasmonic metamaterials. Purcell factor for Ag / Si multilayers has more tunability and broader bandwidths than for Ag single-layer nanostructures. Time-resolved fluorescence measures a 54-fold decay rate enhancement from the Ag / Si metamaterials at the emission wavelength, which is 6-fold larger than from pure silver. A dynamic Lorentzian model fits experiment decay measurements well by taking into account collective response from an ensemble of dipole molecules randomly distributed in space and out-coupling effect from nanostructures. Ag / Si multilayered plasmonic metamaterials possess potential applications in bio-sensing, surface-enhanced Raman spectroscopy, and light-emitting devices.

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