Tunable large resonant absorption in a midinfrared graphene Salisbury screen

Jang, Min Seok; Brar, Victor W.; Sherrott, Michelle C.; López, Josué J.; Kim, Laura; Kim, Seyoon; Choi, Mansoo; Atwater, Harry A.

doi:10.1103/physrevb.90.165409

Cited by 179 publications

(208 citation statements)

References 44 publications

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“…The width and doping dependence of the 1,360 cm À 1 feature follows the behaviour expected for graphene plasmonic modes, and is consistent with reflection measurements 30 . Specifically, the graphene plasmon resonant frequency should vary as o p pn 1/4 W À 1/2 , where n is the carrier density and W refers to the resonator width.…”

Section: Discussionsupporting

confidence: 87%

“…For the case of the 1,360 cm À 1 feature we observe here, the plasmonic loss (and corresponding plasmon generating) processes are attributed to the factors that limit the electron mobility of the graphene, such as defect scattering, impurity scattering, and inelastic electron-electron and electron-phonon interactions 15,22,25,30,33 . In addition, plasmons have been shown to decay via loss channels associated with the edges of graphene nanostructures and by coupling to substrate phonons 22,25 .…”

Section: Discussionmentioning

confidence: 72%

“…In this work, a similar sample displayed up to 3% total absorption when probed using our apparatus. This smaller number reflects the use of non-polarized light, the higher numerical aperture objective of the apparatus, the effect of the window of the vacuum stage and the lower carrier densities used due to the onset of Poole-Frenkel tunnelling in the SiN x at higher temperatures and high gate biases (see Supplementary Note 1; Supplementary Figs 1, 2 and 3 for details) 30,32 .…”

Section: Resultsmentioning

confidence: 99%

“…The parameters for our computational model were equivalent to those described in our previous work, where the optical absorption of the device was modelled 30 . As r S reveals where power is absorbed, it therefore also indicates where far-field thermal emission originates, and an increase in r S indicates an enhancement of the spontaneous emission intensity of the thermally excited dipoles 30 . The results of these simulations are shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Electronic modulation of infrared radiation in graphene plasmonic resonators

et al. 2015

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All matter at finite temperatures emits electromagnetic radiation due to the thermally induced motion of particles and quasiparticles. Dynamic control of this radiation could enable the design of novel infrared sources; however, the spectral characteristics of the radiated power are dictated by the electromagnetic energy density and emissivity, which are ordinarily fixed properties of the material and temperature. Here we experimentally demonstrate tunable electronic control of blackbody emission from graphene plasmonic resonators on a silicon nitride substrate. It is shown that the graphene resonators produce antenna-coupled blackbody radiation, which manifests as narrow spectral emission peaks in the mid-infrared. By continuously varying the nanoresonator carrier density, the frequency and intensity of these spectral features can be modulated via an electrostatic gate. This work opens the door for future devices that may control blackbody radiation at timescales beyond the limits of conventional thermo-optic modulation.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Electronic modulation of infrared radiation in graphene plasmonic resonators

et al. 2015

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“…These ideas have been recently explored for graphene, leading to the prediction of complete optical absorption by a suitably patterned carbon layer [87,88], under the condition that the extinction cross-section per unit cell element is of the order of the unit cell area. The observation of electrically tunable large absorbance in patterned graphene has been recently accomplished [89,90]. We argue here that similar levels of tunable absorption are achievable using noble metals.…”

Section: Complete Optical Absorptionsupporting

confidence: 56%

Plasmonics in atomically thin materials

Abajo

Manjavacas

2015

Faraday Discuss.

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The observation and electrical manipulation of infrared surface plasmons in graphene have triggered a search for similar photonic capabilities in other atomically thin materials that enable electrical modulation of light at visible and near-infrared frequencies, as well as strong interaction with optical quantum emitters. Here, we present a simple analytical description of the optical response of such kinds of structures, which we exploit to investigate their application to light modulation and quantum optics. Specifically, we show that plasmons in one-atom-thick noble-metal layers can be used both to produce complete tunable optical absorption and to reach the strong-coupling regime in the interaction with neighboring quantum emitters. Our methods are applicable to any plasmon-supporting thin materials, and in particular, we provide parameters that allow us to readily calculate the response of silver, gold, and graphene islands. Besides their interest for nanoscale electro-optics, the present study emphasizes the great potential of these structures for the design of quantum nanophotonics devices.

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The Role of Graphene and Other 2D Materials in Solar Photovoltaics

et al. 2018

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2D materials have attracted considerable attention due to their exciting optical and electronic properties, and demonstrate immense potential for next-generation solar cells and other optoelectronic devices. With the scaling trends in photovoltaics moving toward thinner active materials, the atomically thin bodies and high flexibility of 2D materials make them the obvious choice for integration with future-generation photovoltaic technology. Not only can graphene, with its high transparency and conductivity, be used as the electrodes in solar cells, but also its ambipolar electrical transport enables it to serve as both the anode and the cathode. 2D materials beyond graphene, such as transition-metal dichalcogenides, are direct-bandgap semiconductors at the monolayer level, and they can be used as the active layer in ultrathin flexible solar cells. However, since no 2D material has been featured in the roadmap of standard photovoltaic technologies, a proper synergy is still lacking between the recently growing 2D community and the conventional solar community. A comprehensive review on the current state-of-the-art of 2D-materials-based solar photovoltaics is presented here so that the recent advances of 2D materials for solar cells can be employed for formulating the future roadmap of various photovoltaic technologies.

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Tunable large resonant absorption in a midinfrared graphene Salisbury screen

Cited by 179 publications

References 44 publications

Electronic modulation of infrared radiation in graphene plasmonic resonators

Electronic modulation of infrared radiation in graphene plasmonic resonators

Plasmonics in atomically thin materials

The Role of Graphene and Other 2D Materials in Solar Photovoltaics

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