Circular Differential Two-Photon Luminescence from Helically Arranged Plasmonic Nanoparticles

Singh, Haobijam Johnson and Saumitra, * and Singh, Vijay R and Sikdar, Sujit K and Jayaprakash, Balaji and Ghosh, Ambarish (2016) Circular Differential Two-Photon Luminescence from Helically Arranged Plasmonic Nanoparticles. In: ACS PHOTONICS, 3 (5). pp. 863-868.

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Abstract

We report the observation of a circular differential two-photon photoluminescence (TPPL) response from a three-dimensional chiral metamaterial, comprising a system of achiral (spherical) metal nanoparticles arranged on a chiral (helical) dielectric template. The enhanced dipolar response of the individual particles arising from their strong electromagnetic coupling resulted in strong photoluminescence under peak illumination intensities as low as 2 X 10(3) W/cm(2). The TPPL signal was of approximately equal magnitude but of opposite sign, which depended on both the circular polarization state of the incident beam and the handedness of the helical geometry. The strong chiro-optical effect observed in these experiments may be relevant to technologies related to nonlinear plasmonics, in particular imaging applications where control over the polarization state of the imaged photons may be desirable.

Item Type:	Journal Article
Publication:	ACS PHOTONICS
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Keywords:	plasmonics; photoluminescence; chirality; two photon; nonlinear; circular dichroism
Department/Centre:	Division of Biological Sciences > Centre for Neuroscience Division of Biological Sciences > Molecular Biophysics Unit Division of Electrical Sciences > Electrical Communication Engineering Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jun 2016 06:16
Last Modified:	22 Jun 2016 06:16
URI:	http://eprints.iisc.ac.in/id/eprint/54053

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