Plasmonic Control of Spontaneous Emission of Quantum Dots in Sub-Wavelength Photonic Templates

Indukuri, Chaitanya and Chaturvedi, Deepika and Basu, Jaydeep K (2016) Plasmonic Control of Spontaneous Emission of Quantum Dots in Sub-Wavelength Photonic Templates. In: PLASMONICS, 11 (3). pp. 787-795.

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Abstract

Finite difference time domain (FDTD) simulations were performed on two different plasmonic sub-wavelength photonic templates embedded with CdSe quantum dots. Tunable loading of these templates with plasmonic nano antenna allowed control of the emission from the embedded quantum dots. We discuss how large loading of nano antenna can effectively control the optical density of states for the quantum dots leading to enhancement of their radiative decay rates as observed in experiments. On the other hand, at low level of loading, while FDTD fails to capture the observed enhancement of decay rates in experiment, an alternative mechanism is suggested to exist in such cases. Thus, subtle interplay of multiple mechanisms engineered by appropriate placement and loading of plasmonic nano antenna in such templates is demonstrated as an effective method to control optical density of states and hence spontaneous emission of embedded quantum dots.

Item Type:	Journal Article
Publication:	PLASMONICS
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords:	Plasmonics; Sub-wavelength structures; Nanostructures; Nanophotonics and photonic crystals; Cooperative emission
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jun 2016 05:39
Last Modified:	22 Jun 2016 05:39
URI:	http://eprints.iisc.ac.in/id/eprint/54042

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