OP: Coherence and Energy Transfer Processes in Lattice Plasmon Lasers

Project: Research project

Project Details

Description

This proposal describes experimental and theoretical studies of the mechanisms of coherence
and energy transfer processes in nanoscale lasers based on arrays of metal nanoparticles (NPs),
in which surface plasmon excitations can drive stimulated emission in organic dyes and other
gain materials. In our prior work supported by NSF, we (Odom and Schatz) achieved lasing action
from engineered nanocavities with feedback mediated by lattice plasmons as well as surface
plasmon polaritons. Lattice plasmons are excitations that arise from the diffractive coupling
between localized surface plasmons in metal NPs in a periodic array. This coupling leads to
hybrid plasmonic/photonic modes with narrow linewidths (< 4 nm) and a high local density of
optical states that can be exploited for lasing at room-temperature. The emission can also
be tuned in real time using liquid gain media in an opto-fluidic device. Although we have
a cursory understanding how dye molecules affect population inversion at the nanoscopic level
and lasing at the macroscopic level, the detailed mechanism is unknown since coherence and
ultra-fast studies have been lacking. We propose to address this knowledge gap in nano-lasers
using lattice plasmons as a model optical feedback system
StatusFinished
Effective start/end date9/15/168/31/20

Funding

  • National Science Foundation (DMR-1608258)

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