Efficient light emission and absorption in monolayer 2D semiconductors using plasmonic nanostructures (Conference Presentation)

2018 ◽  
Author(s):  
Koray Aydin
Keyword(s):  
Light Emission ◽  
Plasmonic Nanostructures ◽  
2D Semiconductors

Light emission from plasmonic nanostructures enhanced with fluorescent nanodiamonds

2018 ◽  
Author(s):  
Jingyi Zhao ◽  
Yuqing Cheng ◽  
Hongming Shen ◽  
Huan Cheng Chang ◽  
Yuen Yung Hui ◽  
...  
Keyword(s):  
Light Emission ◽  
Plasmonic Nanostructures ◽  
Fluorescent Nanodiamonds

scholarly journals Enhanced Light Emission from Plasmonic Nanostructures by Molecules

2017 ◽  
Vol 121 (42) ◽  
pp. 23626-23632 ◽  
Author(s):  
Yuqing Cheng ◽  
Jingyi Zhao ◽  
Te Wen ◽  
Guantao Li ◽  
Jianning Xu ◽  
...  
Keyword(s):  
Light Emission ◽  
Plasmonic Nanostructures

scholarly journals MoS2 with Stable Photoluminescence Enhancement under Stretching via Plasmonic Surface Lattice Resonance

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1698
Author(s):  
Yen-Ju Chiang ◽  
Tsan-Wen Lu ◽  
Pin-Ruei Huang ◽  
Shih-Yen Lin ◽  
Po-Tsung Lee
Keyword(s):  
Transition Metal ◽  
Light Emission ◽  
Transition Metal Dichalcogenides ◽  
Plasmonic Nanostructures ◽  
Large Area ◽  
Mos2 Monolayer ◽  
Surface Lattice ◽  
Metal Dichalcogenides ◽  
Photoluminescence Enhancement

In this study, by combining a large-area MoS2 monolayer with silver plasmonic nanostructures in a deformable polydimethylsiloxane substrate, we theoretically and experimentally studied the photoluminescence (PL) enhancement of MoS2 by surface lattice resonance (SLR) modes of different silver plasmonic nanostructures. We also observed the stable PL enhancement of MoS2 by silver nanodisc arrays under differently applied stretching strains, caused by the mechanical holding effect of the MoS2 monolayer. We believe the results presented herein can guarantee the possibility of stably enhancing the light emission of transition metal dichalcogenides using SLR modes in a deformable platform.

scholarly journals Large area metasurfaces made with spherical silicon resonators

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 943-951
Author(s):  
Pau Molet ◽  
Luz Karimé Gil-Herrera ◽  
Juan Luis Garcia-Pomar ◽  
Niccolò Caselli ◽  
Álvaro Blanco ◽  
...  
Keyword(s):  
Large Scale ◽  
Light Emission ◽  
Low Cost ◽  
Chemical Vapor ◽  
High Refractive Index ◽  
Dielectric Substrate ◽  
Design Parameters ◽  
Plasmonic Nanostructures ◽  
Large Area ◽  
Silicon Resonators

AbstractHigh-index dielectric nanostructures have emerged as an appealing complement to plasmonic nanostructures, offering similar light management capabilities at the nanoscale but free from the inherent optical losses. Despite the great interest in these all-dielectric architectures, their fabrication still requires cumbersome fabrication techniques that limit their implementation in many applications. Hence, the great interest in alternative scalable procedures. Among those, the fabrication of silicon spheres is at the forefront, with several routes available in the literature. However, the exploitation of the Mie modes sustained by these silicon resonators is limited over large areas by polydispersity or a lack of long-range order. Here, we present an all-dielectric metamaterial fabricated with a low cost and highly scalable technique: a combination of soft imprinting nanolithography and chemical vapor deposition. The resulting all-dielectric metasurface is composed of an array of silicon hemispheres on top of a high refractive index dielectric substrate. This architecture allows the exploitation of high-quality Mie resonances at a large scale due to the high monodispersity of the hemispheres organized in a single crystal two-dimensional lattice. The optical response of the metasurface can be engineered by the design parameters of the nanoimprinted structure. We further demonstrate the potential of this platform to enhance light emission by coupling dye molecules to the sustained Mie resonances and measuring both an eight-fold amplified signal and a triple lifetime reduction.

scholarly journals Exciton-plasmon polariton coupling and hot carrier generation in two-dimensional SiB semiconductors: a first-principles study

Nanophotonics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 337-349 ◽  
Author(s):  
Ali Ramazani ◽  
Farzaneh Shayeganfar ◽  
Jaafar Jalilian ◽  
Nicholas X. Fang
Keyword(s):  
Light Emission ◽  
Luminescence Spectra ◽  
Two Dimensional ◽  
Electron Hole ◽  
Strong Electron ◽  
Hot Carrier ◽  
2D Semiconductors ◽  
Plasmon Polaritons ◽  
Quantum Framework ◽  
External Strain

AbstractExciton (strong electron–hole interactions) and hot carriers (HCs) assisted by surface plasmon polaritons show promise to enhance the photoresponse of nanoelectronic and optoelectronic devices. In the current research, we develop a computational quantum framework to study the effect of coupled exciton and HCs on the photovoltaic energy distribution, scattering process, polarizability, and light emission of two-dimensional (2D) semiconductors. Using a stable 2D semiconductor (semihydrogenated SiB) as our example, we theoretically show that external strain and thermal effect on the SiB can lead to valley polarized plasmon quasiparticles and HC generation. Our results reveal that the electron–phonon and electron–electron (e–e) interactions characterize the correlation between the decay rate, scattering of excitons, and generation of HCs in 2D semiconductors. Moreover, phonon assisted luminescence spectra of SiB suggest that light emission can be enhanced by increasing strain and temperature. The polarized plasmon with strong coupling of electronic and photonics states in SiB makes it as a promising candidate for light harvesting, plasmonic photocurrent devices, and quantum information.

scholarly journals Chemical Tuning on Resonance Coupling in Gold Nanorod−Monolayer WS2 Heterostructures

2021 ◽  
Vol 8 ◽  
Author(s):  
Shiya Wen ◽  
Shiyu Deng ◽  
Kun Chen ◽  
Huanjun Chen ◽  
Shaozhi Deng
Keyword(s):  
High Efficiency ◽  
Plasmonic Nanostructures ◽  
Transition Strength ◽  
Large Area ◽  
Exciton Transition ◽  
2D Semiconductors ◽  
Resonance Coupling ◽  
Electrostatic Gating ◽  
Splitting Energy ◽  
Recent Attention

Resonance coupling between plasmonic resonances in metallic nanostructures and excitons in two-dimensional (2D) semiconductors has attracted much recent attention. The 2D semiconductor excitons are sensitive to external stimulus, enabling active tuning on the resonance couplings by physical, such as applying electrostatic gating, thermal scanning, etc., or chemical approaches. Among the others, chemical tuning approach has the advantage of facile implementation, high efficiency, and being capable of large-area tuning. Here, we report on chemical tuning of resonance coupling in heterostructures consisted of individual gold nanorods integrated with monolayer WS2. We showed that by incubating the heterostructures into a bis (trifluoro-methane) sulfonimide (TFSI) solution, the exciton transition strength of the WS2 will be enhanced significantly. As a result, the resonance coupling in the heterostructures evolved from a weak coupling regime to a strong coupling one, with the mode splitting energy increases from 94.96 to 105.32 meV. These findings highlight the potential of chemical treatment as an efficient technique for tailoring the interactions between plasmonic nanostructures and 2D semiconductors.

scholarly journals Graphene plasmonic devices for terahertz optoelectronics

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1901-1920 ◽  
Author(s):  
Yuyu Li ◽  
Khwanchai Tantiwanichapan ◽  
Anna K. Swan ◽  
Roberto Paiella
Keyword(s):  
High Performance ◽  
Noble Metals ◽  
Light Emission ◽  
Charge Density Waves ◽  
Plasmonic Nanostructures ◽  
Optical Modulators ◽  
Radiation Mechanisms ◽  
Resonant Structures ◽  
Graphene Plasmons ◽  
Collective Oscillations

AbstractPlasmonic excitations, consisting of collective oscillations of the electron gas in a conductive film or nanostructure coupled to electromagnetic fields, play a prominent role in photonics and optoelectronics. While traditional plasmonic systems are based on noble metals, recent work has established graphene as a uniquely suited materials platform for plasmonic science and applications due to several distinctive properties. Graphene plasmonic oscillations exhibit particularly strong sub-wavelength confinement, can be tuned dynamically through the application of a gate voltage, and span a portion of the infrared spectrum (including mid-infrared and terahertz (THz) wavelengths) that is not directly accessible with noble metals. These properties have been studied in extensive theoretical and experimental work over the past decade, and more recently various device applications are also beginning to be explored. This review article is focused on graphene plasmonic nanostructures designed to address a key outstanding challenge of modern-day optoelectronics – the limited availability of practical, high-performance THz devices. Graphene plasmons can be used as a means to enhance light–matter interactions at THz wavelengths in a highly tunable fashion, particularly through the integration of graphene resonant structures with additional nanophotonic elements. This capability is ideally suited to the development of THz optical modulators (where absorption is switched on and off by tuning the plasmonic resonance) and photodetectors (relying on plasmon-enhanced intraband absorption or rectification of charge-density waves), and promising devices based on these principles have already been reported. Novel radiation mechanisms, including light emission from electrically excited graphene plasmons, are also being explored for the development of compact narrowband THz sources.

Sign in / Sign up

Export Citation Format

Share Document