Broadband room temperature strong coupling between quantum dots and metamaterials

Indukuri, S. R. K. Chaitanya; Yadav, Ravindra Kumar; Basu, J. K.

doi:10.1039/c7nr03008h

Cited by 17 publications

(22 citation statements)

References 44 publications

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“…4,5 It has also been demonstrated that a collection of emitters on hyperbolic materials show strong coupling. 6 Modification of spontaneous emission rate of dye molecules, 7 rare earth ions 8 and strong coupling of semiconductor quantum dots 9 in vicinity of HMM is reported. The transition energy can be tuned by changing the fabrication parameters.…”

Section: Introductionmentioning

confidence: 89%

Selectively strong coupling MoS$_2$ excitons to a metamaterial at room temperature

Kalluru,

Basu

2022

Preprint

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Light emitters in vicinity of a hyperbolic metamaterial (HMM) show a range of quantum optical phenomena from spontaneous decay rate enhancement to strong coupling. In this study, we integrate monolayer Molybdenum disulfide (MoS 2 ) emitter in near field region of HMM. The MoS 2 monolayer has A and B excitons, which emit in the red region of visible spectrum. We find that the B excitons couple to HMM differently compared to A excitons. The fabricated HMM transforms to a hyperbolic dispersive medium at ≃ 2.13 eV, from an elliptical dispersive medium. The selective coupling of B Excitons to the HMM modes is attributed to the inbuilt field gradient of the transition. The B exciton energy lies close to the transition point of the HMM, relative to A Exciton. So, the HMM modes couple more to the B excitons and the metamaterial functions as selective coupler. The coupling strength calculations show that coupling is 2.5 times stronger for B excitons relative to A excitons. High near field of HMM, large magnitude and the in-plane transition dipole moment of MoS 2 Excitons, result in strong coupling of B excitons and formation of hybrid light-matter states. The measured differential Reflection and Photoluminescence spectra indicate the presence of hybrid light-matter states i.e. Exciton-Polaritons. Rabi splitting of

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Section: Introductionmentioning

confidence: 89%

Selectively strong coupling MoS$_2$ excitons to a metamaterial at room temperature

Kalluru,

Basu

2022

Preprint

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“…The loss compensation and lasing action in metamaterials based on gold nanorod arrays coated with thin films of PVA embedded with R101 dye was demonstrated 108 . Depending on the chosen parameters (metal fill ratio), the sample under study can exhibit hyperbolic or elliptic dispersion.…”

Section: -18mentioning

confidence: 99%

Photoluminescence control by hyperbolic metamaterials and metasurfaces: a review

Beliaev

Takayama

Melentiev

et al. 2021

OEA

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Photoluminescence including fluorescence plays a great role in a wide variety of applications from biomedical sensing and imaging to optoelectronics. Therefore, the enhancement and control of photoluminescence has immense impact on both fundamental scientific research and aforementioned applications. Among various nanophotonic schemes and nanostructures to enhance the photoluminescence, we focus on a certain type of nanostructures, hyperbolic metamaterials (HMMs). HMMs are highly anisotropic metamaterials, which produce intense localized electric fields. Therefore, HMMs naturally boost photoluminescence from dye molecules, quantum dots, nitrogen-vacancy centers in diamonds, perovskites and transition metal dichalcogenides. We provide an overview of various configurations of HMMs, including metal-dielectric multilayers, trenches, metallic nanowires, and cavity structures fabricated with the use of noble metals, transparent conductive oxides, and refractory metals as plasmonic elements. We also discuss lasing action realized with HMMs.

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“…The former corresponds to a close-packed configuration and the latter to a randomly distributed configuration of SQDs. For the C-configuration discussed in the main text, stacks of 100 nm thick compact layers of SQDs were deposited on a plasmon lattice using the Langmuir-Schaefer (LS) deposition technique [1][2][3]. In the LS deposition technique, a hydrophobic SQD solution in chloroform is spread drop by drop on a water surface of a Langmuir-Blodgett (LB) trough until the pressure reaches saturation level.…”

Section: Sqd/plasmon Lattice Sample Preparationmentioning

confidence: 99%

“…Figure S3 shows AFM images after one and three SQD layer deposition onto the lattice. Generally, the films transferred by the LS technique have breakages [1,2].…”

Section: Atomic Force Microscopy Images Of the Sqds/plasmon Latticementioning

confidence: 99%

“…These breakages can occur because of the larger height (40 nm) of the Ag nanoparticles (NPs) as compared to thickness of the SQD We spread a 196ml volume (V) of SQDs with concentration (C) 10.55mg/ml on a 45 cm 2 area of a LB trough to get a single compact SQD monolayer. This allows us to calculate the expected areal number density of SQDs, n A , in the transferred SQD monolayer on the lattice [2]:…”

Section: Atomic Force Microscopy Images Of the Sqds/plasmon Latticementioning

confidence: 99%

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

et al. 2020

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Here, we provide the details of sample preparation, experimental set up, characterization of samples, and additional computational results. 1 CONTENTSSemiconductor quantum dot photoluminescence (PL) and absorption spectra 2 SQD/plasmon lattice sample preparation 3Atomic force microscopy images of the SQDs/plasmon lattice 4Semiconductor quantum dot number density (ρ) 5Comparison of PL splitting in the C 3 and R configurations 6Semiconductor Quantum dot density dependent Transmission and Pl spectra 7Experimental setup for distance-dependent PL spectra 8Photoluminescence (PL) map of the SQDs/plasmon lattice 9Distance dependence of the PL spectral splitting of the SQD/plasmon lattice 10Distance dependence of the PL intensity profile 11Propagation distances along the X and Y directions 13Additional coupled dipole results 14 Phenomenological cQED Model 16References 20QUANTUM DOT PHOTOLUMINESCENCE (PL) AND ABSORPTION SPEC-TRA To measure the semiconductor quantum dot (SQD) PL and absorption spectra, a SQD solution was prepared by dissolving cleaned SQDs in toluene. Figure S1 shows an absorption spectrum for a SQD solution, measured with a Perkin-Elmer UV-Vis spectrometer and the corresponding photoluminescence (PL) spectra, measured with a Perkin-Elmer fluorescence spectrometer.

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Broadband room temperature strong coupling between quantum dots and metamaterials

Cited by 17 publications

References 44 publications

Selectively strong coupling MoS$_2$ excitons to a metamaterial at room temperature

Selectively strong coupling MoS$_2$ excitons to a metamaterial at room temperature

Photoluminescence control by hyperbolic metamaterials and metasurfaces: a review

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

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