Manipulation of the Faraday rotation by graphene metasurfaces

Dolatabady, Alireza; Granpayeh, Nosrat

doi:10.1016/j.jmmm.2018.08.033

Cited by 23 publications

(11 citation statements)

References 43 publications

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“…It is also instructive to discuss the effect of controlling the FR and MOKE spectra by varying the chemical potential of the silicene surface, e.g, by applying a bias voltage [37] or optical pumping [39]. For illustration purposes, we consider three different values of chemical potentials µ F =0, 10 and 22 meV, while keeping the magnetic field 1 T, in the TI regime (∆ z = 0.5∆ so ) and an angle of incidence of 30 • .…”

Section: Resultsmentioning

confidence: 99%

“…We now present a general method to calculate the Faraday and Kerr rotation angles and the resulting ellipticities. Due to the rich LL structure, these MO effects are modulated by myriad stimuli such as electric and magnetic fields [4,37,38], chemical potential gating [37], modification through doping, optical pumping [39] as well as temperature [40] and the substrate effect [4].…”

Section: B Magneto-optical Rotations and Ellipticitiesmentioning

confidence: 99%

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Magneto-optical effects in the Landau level manifold of 2D lattices with spin-orbit interaction

Shah

Anwar

2019

Opt. Express

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Silicene is a competitive and promising 2D material, possessing interesting topological, electronic and optical properties. The presence of strong spin orbit interaction in silicene and its analogues, germanene and tinene, leads to the opening of a gap in the energy spectrum and spin-splitting of the bands in each valley. Building upon prior work we discuss a general method to determine the magneto-optic response of silicene when a Gaussian beam is incident on silicene grown on a dielectric substrate in the presence of a static magnetic field. We use a semiclassical treatment to describe the Faraday rotation (FR) and Magneto-optical Kerr effect (MOKE). The response can be modulated both electrically and magnetically. We derive analytic expressions for valley and spin polarized FR and MOKE for arbitrary polarization of incident light in the terahertz regime. We demonstrate that large FR and MOKE can be achieved by tuning the electric field, magnetic fields and chemical potential in these fascinating 2D materials.

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Section: Resultsmentioning

confidence: 99%

Section: B Magneto-optical Rotations and Ellipticitiesmentioning

confidence: 99%

Magneto-optical effects in the Landau level manifold of 2D lattices with spin-orbit interaction

Shah

Anwar

2019

Opt. Express

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“…167,168 Alternatively, giant Faraday rotation in graphene could be remarkably enhanced by constructing resonators 169 or patterning graphene into metasurfaces. 170,171 These unique magneto-optic effects, while are conceptually interesting, may open avenues for constructing terahertz magneto-optic modulators with ultrathin materials under quantum mechanism.…”

Section: Terahertz Modulators Based On 2d Materialsmentioning

confidence: 99%

2D materials-enabled optical modulators: From visible to terahertz spectral range

Gan

Englund

Thourhout

et al. 2022

Applied Physics Reviews

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Two-dimensional (2D) materials with layered structures have a variety of exceptional electronic and optical attributes for potentially developing basic functions of light wave technology from light-emitting to -modulating and -sensing. Here, we present state-of-the-art 2D materials-enabled optical intensity modulators according to their operation spectral ranges, which are mainly determined by the optical bandgaps of the 2D materials. Leveraging rich electronic structures from different 2D materials and the governed unique light–matter interactions, the working mechanisms and device architectures for the enabled modulators at specific wavelength ranges are discussed. For instance, the tunable excitonic effect in monolayer transition metal dichalcogenides allows the modulation of visible light. Electro-absorptive and electro-refractive graphene modulators could be operated in the telecom-band relying on their linear dispersion of the massless Dirac fermions. The bendable electronic band edge of the narrow bandgap in few-layer black phosphorus promises the modulation of mid-infrared light via the quantum-confined Franz–Keldysh or Burstein–Moss shift effect. Electrically and magnetically tunable optical conductivity in graphene also supports the realizations of terahertz modulators. While these modulators were demonstrated as proof of concept devices, part of them have great potential for future realistic applications, as discussed with their wavelength coverage, modulation depth, insertion loss, dynamic response speed, etc. Specifically, benefiting from the well-developed technologies of photonic chips and optical fibers in telecom and datacom, the 2D materials-based modulators integrated on these photonic structures are expected to find applications in fiber and chip optical communications. The free-space mid-infrared and terahertz modulators based on 2D materials can expect application in chemical bond spectroscopy, free-space communications, and environment/health sensing.

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“…It has been reported that when applying an external magnetic field perpendicular to graphene sheet, a hybridization occurs between the cyclotron excitation and the plasmon, resulting in a magneto-plasmon mode 33,34 . Lots of reports have focused on the manipulation of Faraday rotation in graphene, which represents the property of dichroism under a magnetic bias [35][36][37][38] .However, the use of external magnetic fields to control the spontaneous emission of emitters coupled to magneto-plasmon mode in graphene has been rarely studied.…”

Section: Introduction Introductionmentioning

confidence: 99%

Local and nonlocal Purcell factor control of an emitter in graphene under the modulation of a static magnetic field

Chen

et al. 2022

J. Opt. Soc. Am. B

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Spontaneous emission control of emitters hold great promise for applications in photonics and quantum optics. As a definition of the spontaneous emission lifetime of an atom or molecule, the Purcell factor of an emitter coupled with graphene plasmons by a static magnetic field is studied. The results show that the Purcell factor can be effectively modulated by the applying of external magnetic field to graphene at lower terahertz frequencies. In addition, in the presence of a magnetic field, the coupling between the graphene and emitter becomes stronger, which results in a strong enhancement of the emission of the emitter and the numerically calculated Purcell factor is increased. More specifically, the Purcell factor increases by almost an order of magnitude when the applied magnetic field is 10T. Moreover, the Purcell factor also depends on the polarization direction of the emitter, especially when the polarization direction of the emitter is parallel to the graphene plane, the Purcell factor will show anisotropy with the change of polarization angle. Bias of the applied magnetic field extends a new path for the realization of Purcell factor modulation based on graphene-emitter interaction, it may provides a promising application value for the design of the photo-magnetic based quantum devices.

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Manipulation of the Faraday rotation by graphene metasurfaces

Cited by 23 publications

References 43 publications

Magneto-optical effects in the Landau level manifold of 2D lattices with spin-orbit interaction

Magneto-optical effects in the Landau level manifold of 2D lattices with spin-orbit interaction

2D materials-enabled optical modulators: From visible to terahertz spectral range

Local and nonlocal Purcell factor control of an emitter in graphene under the modulation of a static magnetic field

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