Room Temperature Emission Line Narrowing and Long-Range Photon Transport in Colloidal Quantum Wells Coupled to Metasurface Resonance

Sharma, K and Rout, D and Nag, A and Venkatachalam, P and Selvaraja, SK and Agarwal, GS and Basu, JK (2024) Room Temperature Emission Line Narrowing and Long-Range Photon Transport in Colloidal Quantum Wells Coupled to Metasurface Resonance. In: Advanced Optical Materials, 12 (25).

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Abstract

Highly efficient and spectrally pure single photon sources are desirable in fundamental studies of quantum physics and in many varied applications like in quantum metrology and quantum cryptography. 2D semiconductor colloidal quantum wells (CQWs) are quite appropriate as nanoscale photon sources because of their giant oscillator strengths and large absorption cross sections. The integration of such sources with dielectric metasurfaces exhibiting narrow resonances provides an excellent platform for highly efficient light-matter interactions and the development of on-chip light sources with high spectral purity. Here details on the use of capillary filling method are reported to achieve photonic coupling of CQWs to a metasurface resonator (MSR) featuring a square-lattice geometry of holes on a slab-waveguide to achieve strongly enhanced and almost spectrally pure emission of �3 of the original out-of-plane emission line-width of the quantum emitters at room temperature. Long-range exciton-mediated photon transport facilitated by in-plane slab waveguide modes is demonstrated and a theoretical basis to explain all the experimental data including that in terms of the MSR-modified Lamb shifts and Purcell decays is provided. The results demonstrate a new platform with emergent photonic properties and suggest possibility of their use in on-chip photonic quantum information processing. © 2024 Wiley-VCH GmbH.

Item Type:	Journal Article
Publication:	Advanced Optical Materials
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright for this article belongs to John Wiley and Sons Inc.
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	18 Dec 2024 10:07
Last Modified:	18 Dec 2024 10:07
URI:	http://eprints.iisc.ac.in/id/eprint/85873

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