The road to atomically thin metasurface optics

Brongersma, Mark L.

doi:10.1515/nanoph-2020-0444

Cited by 36 publications

(34 citation statements)

References 243 publications

(246 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the past few years, all‐dielectric nanophotonics has become one of the cornerstones of modern research in nano‐optics. [ 1,2 ] Unlike plasmonic structures, dielectric ones make it possible to overcome the fundamental limitation of Ohmic losses. Utilizing electric and magnetic Mie‐like resonances of nanoparticles, consisting of low‐loss high‐index semiconductor or dielectric materials, such as Si, TiO 2 , Ge, and GaAs, [ 3,4 ] enables manipulating both the electric and magnetic components of light at the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Theory, Observation, and Ultrafast Response of the Hybrid Anapole Regime in Light Scattering

Valero

Gurvitz

Benimetskiy

et al. 2021

Laser & Photonics Reviews

View full text Add to dashboard Cite

Modern nanophotonics has witnessed the rise of “electric anapoles” (EDAs), destructive interferences of electric and toroidal electric dipoles, actively exploited to resonantly decrease radiation from nanoresonators. However, the inherent duality in Maxwell equations suggests the intriguing possibility of “magnetic anapoles,” involving a nonradiating composition of a magnetic dipole and a magnetic toroidal dipole. Here, a hybrid anapole (HA) of mixed electric and magnetic character is predicted and observed experimentally via dark field spectroscopy, with all the dominant multipoles being suppressed by the toroidal terms in a nanocylinder. Breaking the spherical symmetry allows to overlap up to four anapoles stemming from different multipoles with just two tuning parameters. This effect is due to a symmetry‐allowed connection between the resonator multipolar response and its eigenstates. The authors delve into the physics of such current configurations in the stationary and transient regimes and explore new ultrafast phenomena arising at sub‐picosecond timescales, associated with the HA dynamics. The theoretical results allow the design of non‐Huygens metasurfaces featuring a dual functionality: perfect transparency in the stationary regime and controllable ultrashort pulse beatings in the transient. Besides offering significant advantages with respect to EDAs, HAs can play an essential role in developing the emerging field of ultrafast resonant phenomena.

show abstract

Section: Introductionmentioning

confidence: 99%

Theory, Observation, and Ultrafast Response of the Hybrid Anapole Regime in Light Scattering

Valero

Gurvitz

Benimetskiy

et al. 2021

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

“…For example, all lasers reported so far are optically pumped. It might be more (3) Atomically thin metasurface 557 . 1L-and a few-layer TMDCs have been successfully used to construct metalenses.…”

Section: Optical Properties Of Tmdc-based Heterostructuresmentioning

confidence: 99%

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

et al. 2022

View full text Add to dashboard Cite

Two dimensional (2D) transition metal dichalcogenide (TMDC) materials, such as MoS2, WS2, MoSe2, and WSe2, have received extensive attention in the past decade due to their extraordinary electronic, optical and thermal properties. They evolve from indirect bandgap semiconductors to direct bandgap semiconductors while their layer number is reduced from few layers to a monolayer limit. Consequently, there is strong photoluminescence in a monolayer (1L) TMDC due to the large quantum yield. Moreover, such monolayer semiconductors have two other exciting properties: large binding energy of excitons and valley polarization. These properties make them become ideal materials for various electronic, photonic and optoelectronic devices. However, their performance is limited by the relatively weak light-matter interactions due to their atomically thin form factor. Resonant nanophotonic structures provide a viable way to address this issue and enhance light-matter interactions in 2D TMDCs. Here, we provide an overview of this research area, showcasing relevant applications, including exotic light emission, absorption and scattering features. We start by overviewing the concept of excitons in 1L-TMDC and the fundamental theory of cavity-enhanced emission, followed by a discussion on the recent progress of enhanced light emission, strong coupling and valleytronics. The atomically thin nature of 1L-TMDC enables a broad range of ways to tune its electric and optical properties. Thus, we continue by reviewing advances in TMDC-based tunable photonic devices. Next, we survey the recent progress in enhanced light absorption over narrow and broad bandwidths using 1L or few-layer TMDCs, and their applications for photovoltaics and photodetectors. We also review recent efforts of engineering light scattering, e.g., inducing Fano resonances, wavefront engineering in 1L or few-layer TMDCs by either integrating resonant structures, such as plasmonic/Mie resonant metasurfaces, or directly patterning monolayer/few layers TMDCs. We then overview the intriguing physical properties of different types of van der Waals heterostructures, and their applications in optoelectronic and photonic devices. Finally, we draw our opinion on potential opportunities and challenges in this rapidly developing field of research.

show abstract

“…Subwavelength electromagnetic (EM) wave absorbers are of substantial interest across all parts of the EM spectrum, [1][2][3][4][5] but are especially important for the MHz and GHz regimes due to their practical significance in stealth technology, [6,7] heat detection, [8] sensing, [9] and communication. [10] EM wave absorbers are particularly important for self-driving vehicles or aerial systems, where insufficient protection against stray EM signals may lead to an electronic malfunction, posing a serious risk to human safety.…”

Section: Introductionmentioning

confidence: 99%

Coupled Solid and Inverse Antenna Stacks Above Metal Ground as Metamaterial Perfect Electromagnetic Wave Absorbers with Extreme Subwavelength Thicknesses

Kim

Jung

Choi

et al. 2022

Advanced Optical Materials

View full text Add to dashboard Cite

The ability to completely absorb an electromagnetic (EM) wave with a material much thinner than the wavelength is a prerequisite for achieving ultracompact, flexible, and lightweight EM devices. Herein, a metamaterial microwave perfect absorber is demonstrated as thin as 1/1250 of the target wavelength by coupling an array of metal patches to inverse cross metal antennas through a dielectric separator and with a reflector placed underneath. Compared to a conventional three‐layer absorber, the modified design reduces the resonance frequency by up to tenfolds without altering the patch and dielectric layers, but by reconfiguring the induced current pathways that reorient the dipolar magnetic fields and dramatically boost the magnetic flux. With the reflector, the stack is framed for perfect absorption at the critical coupling condition, which is identified by monitoring the reflection phase shift across the resonance frequency. The study provides guidelines for shrinking the thickness further and can be extended to other frequencies.

show abstract

The road to atomically thin metasurface optics

Cited by 36 publications

References 243 publications

Theory, Observation, and Ultrafast Response of the Hybrid Anapole Regime in Light Scattering

Theory, Observation, and Ultrafast Response of the Hybrid Anapole Regime in Light Scattering

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

Coupled Solid and Inverse Antenna Stacks Above Metal Ground as Metamaterial Perfect Electromagnetic Wave Absorbers with Extreme Subwavelength Thicknesses

Contact Info

Product

Resources

About