Strongly Coupled Exciton-Surface Lattice Resonances Engineer Long-Range Energy Propagation

Yadav, RK and Otten, M and Wang, W and Cortes, CL and Gosztola, DJ and Wiederrecht, GP and Gray, SK and Odom, TW and Basu, JK (2020) Strongly Coupled Exciton-Surface Lattice Resonances Engineer Long-Range Energy Propagation. In: Nano Letters, 20 (7). pp. 5043-5049.

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Abstract

Achieving propagation lengths in hybrid plasmonic systems beyond typical values of tens of micrometers is important for quantum plasmonics applications. We report long-range optical energy propagation due to excitons in semiconductor quantum dots (SQDs) being strongly coupled to surface lattice resonance (SLRs) in silver nanoparticle arrays. Photoluminescence (PL) measurements provide evidence of an exciton-SLR (ESLR) mode extending at least 600 μm from the excitation region. We also observe additional energy propagation with range well beyond the ESLR mode and with dependency on the coupling strength, g, between SQDs and SLR. Cavity quantum electrodynamics calculations capture the nature of the PL spectra for consistent g values, while coupled dipole calculations show a SQD number-dependent electric field decay profile consistent with the experimental spatial PL profile. Our results suggest an exciting direction wherein SLRs mediate long-range interactions between SQDs, having possible applications in optoelectronics, sensing, and quantum information science. © 2020 American Chemical Society.

Item Type:	Journal Article
Publication:	Nano Letters
Publisher:	American Chemical Society
Additional Information:	Copy right for this article belongs to American Chemical Society
Keywords:	Electric fields; Electrodynamics; Excitons; Optical lattices; Plasmonics; Quantum optics; Silver nanoparticles, Cavity Quantum Electrodynamics; Coupling strengths; Long range interactions; Photoluminescence measurements; Propagation lengths; Quantum information science; Quantum plasmonics; Silver nanoparticle array, Semiconductor quantum dots
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	11 Dec 2020 06:07
Last Modified:	11 Dec 2020 06:07
URI:	http://eprints.iisc.ac.in/id/eprint/66154

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