Tailoring light-matter interaction in 
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–gold nanoparticles hybrid systems

Bhattacharya, Tara Shankar; Mitra, S.; Singha, Shib Shankar; Mondal, Prasanna Kumar; Singha, Achintya

doi:10.1103/physrevb.100.235438

Cited by 12 publications

(9 citation statements)

References 45 publications

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“…Employing ultrafast transient absorption spectroscopy with pumping photon energy below the indirect bandgap of the rippled MoS 2 quadrilayer, Camellini et al directly demonstrated a plasmon-induced charge transfer between Au and MoS 2 [42]. As reported by Bhattacharya and coauthors, the Au NPs acted as dopants to WS 2 in the plasmonic hybrid nanostructures [28]. The broadening and enhancement of A 1 mode observed in this work is closed related with the electronic doping effect from Au film.…”

Section: Resultssupporting

confidence: 64%

“…As it is well known, the localized electromagnetic (EM) field at close vicinity of the Au NPs can be enhanced due to the LSPR effect under an excitation [35]. The intensity enhancement of the Raman modes for WS 2 /Au is attributed to the surface enhanced Raman scattering (SERS) process as a result of the enhanced EM field [28]. In addition to the SERS process, other physical mechanisms cannot be excluded from the distinct polarized-Raman spectra of WS 2 /Au.…”

Section: Resultsmentioning

confidence: 99%

“…Butun et al reported a fourfold enhancement in the absorption of a WS 2 film after being hybridized with Ag nanodiscs [27]. The enhanced Raman and PL emission were observed on the hybrids of WS 2 and Au nanoparticles (NPs), which were attributed to the increased internal quantum efficiency and decreased activation energy due to coupling with Au NPs [28]. Thus, the plasmonic effect is predicted to have influence on the magneto-optical properties of WS 2 .…”

Section: Introductionmentioning

confidence: 99%

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Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy

et al. 2021

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In recent years, the magneto-optical properties of two-dimensional transition metal disulfides have attracted more and more attention due to their further device applications in spintronics and valleytronics. However, to our knowledge, the plasmonic effect on the magneto-optical properties of WS2 has not been studied. In this work, monolayer WS2 transferred on SiO2/Si substrate and Au film were investigated respectively using polarized-Raman spectroscopy at 4 K under different magnetic fields. Prominent magnetic field–induced variations in the Raman intensities of WS2 samples were observed, which also exhibited significant differences in the spectral evolution versus magnetic field. The resonance magnetic field was 5 T and 5.5 T for the WS2 on SiO2/Si substrate and Au film, respectively. Remarkably, the magneto-optical Raman intensities of A1′ and 2LA(M) modes for WS2 on Au film were reduced to approximately 60% compared with that of WS2 on SiO2/Si. These results suggest that the plasmonic effect–induced charge transfer plays an important role in the magneto-optical Raman effect of WS2.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy

et al. 2021

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“…12). 118,119 The B-N bond length is 1.45Å, which forms through sp 2 hybridization. Three sp 2 orbits of each B atom combine with the sp 2 orbit of adjacent N atoms to form a strong s bond, likewise, three sp 2 orbits of each N atom combine with the sp 2 orbit of adjacent B atoms to form a strong s bond.…”

Section: Structure Of H-bnmentioning

confidence: 99%

Graphene, hexagonal boron nitride, and their heterostructures: properties and applications

2017

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In recent years, two-dimensional atomic-level thickness crystal materials have attracted widespread interest such as graphene, hexagonal boron nitride (h-BN), silicene, germanium, black phosphorus (BP), transition metal sulfides and so on. These graphene-like two-dimensional (2D) materials have a lot of excellent characteristics such as high specific surface area and high Young's modulus, and many potential applications in diverse areas such as photo-electricity, catalysts, and transistors. In this review, we introduced the synthesis, structure, properties, and applications of graphene, h-BN, and their heterostructures, especially focused on their mechanical, optical, thermal, electric, and magneticproperties. Finally, we present the outlooks and perspectives for these types of excellent 2D materials and their potential applications. Fig. 42 Schematic of the structures of: (A) an in-plane pressure sensor and (B) a tunnelling pressure sensor. Transmission spectra of: (C) the in-plane sensor and (D) the tunnelling sensor as functions of electron energy with different external pressure. 213This journal is

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“…[ 17,18 ] People observed polarization‐dependent Raman intensity in many 2‐D materials, such as WS 2 and MoS 2. [ 19–22 ] This article will study the vibrational properties and Raman spectra of 2‐D octagon‐structure nitrogen by density functional theory (DFT).…”

Section: Introductionmentioning

confidence: 99%

Vibrational properties and Raman spectra of 2‐D octagon‐structure nitrogen

Wang

2020

J Raman Spectroscopy

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We studied the vibrational properties and Raman spectra of two‐dimensional (2‐D) octagon‐structure nitrogen with density functional theory (DFT). There are 10 Raman active modes whose irreducible representations are A1g, B1g, B2g, and Eg. By calculating Raman tensor of each Raman active mode, we obtained polarization angle‐dependent Raman intensities. The results show that B1g and B2g modes can show polarization angle‐dependent Raman intensities when the incident light wave vector is perpendicular to the plane of the nitrogen monolayer, which is different from some other isotropic 2‐D materials. We also discussed polarization angle‐dependent Raman intensities when the incident light wave vector is parallel to the plane of the monolayer. We found that the Raman spectra have seven peaks when the incident light wave vector is perpendicular to the monolayer, while there are four distinct peaks when the incident light wave vector is parallel to the monolayer. Our results will help experimentalists to identify the existence and orientation of octagon‐structure nitrogen monolayer when they are growing it.

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Tailoring light-matter interaction in WS2 –gold nanoparticles hybrid systems

Cited by 12 publications

References 45 publications

Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy

Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy

Graphene, hexagonal boron nitride, and their heterostructures: properties and applications

Vibrational properties and Raman spectra of 2‐D octagon‐structure nitrogen

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