Unidirectional luminescence from InGaN/GaN quantum-well metasurfaces

Iyer, Prasad P.; DeCrescent, Ryan A.; Mohtashami, Yahya; Lheureux, Guillaume; Butakov, Nikita A.; Alhassan, Abdullah I.; Weisbuch, C.; Nakamura, Shuji; DenBaars, Steven P.; Schuller, Jon A.

doi:10.1038/s41566-020-0641-x

Cited by 72 publications

(61 citation statements)

References 50 publications

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“…Metasurfaces of Mie and plasmonic resonators also enabled the design of conceptually new types of highperformance antireflection coatings [66,[83][84][85]. New research further shows that active light emitting layers can be patterned at the subwavelength scale to enhance and direct light emission [86][87][88][89]. This is an area where commercialization of metasurface concepts can be possibly fastest as the device infrastructure for realizing nanostructured optoelectronic devices is already very mature.…”

Section: Metasurfaces In Optoelectronic Devicesmentioning

confidence: 99%

The road to atomically thin metasurface optics

Brongersma

2020

Nanophotonics

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The development of flat optics has taken the world by storm. The initial mission was to try and replace conventional optical elements by thinner, lightweight equivalents. However, while developing this technology and learning about its strengths and limitations, researchers have identified a myriad of exciting new opportunities. It is therefore a great moment to explore where flat optics can really make a difference and what materials and building blocks are needed to make further progress. Building on its strengths, flat optics is bound to impact computational imaging, active wavefront manipulation, ultrafast spatiotemporal control of light, quantum communications, thermal emission management, novel display technologies, and sensing. In parallel with the development of flat optics, we have witnessed an incredible progress in the large-area synthesis and physical understanding of atomically thin, two-dimensional (2D) quantum materials. Given that these materials bring a wealth of unique physical properties and feature the same dimensionality as planar optical elements, they appear to have exactly what it takes to develop the next generation of high-performance flat optics.

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Section: Metasurfaces In Optoelectronic Devicesmentioning

confidence: 99%

The road to atomically thin metasurface optics

Brongersma

2020

Nanophotonics

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“…Metasurfaces consisting of a periodic arrangement of artificial atoms can create delocalized virtual optical states (VOS) with enhanced local density of states and deterministic energy (spectral) and momentum (spatial) distributions, thus offering a powerful tool to manipulate incoherent light emission. [ 1–5 ]…”

Section: Introductionmentioning

confidence: 99%

Optical Rashba Effect in a Light‐Emitting Perovskite Metasurface

et al. 2022

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The Rashba effect, i.e., the splitting of electronic spin‐polarized bands in the momentum space of a crystal with broken inversion symmetry, has enabled the realization of spin‐orbitronic devices, in which spins are manipulated by spin–orbit coupling. In optics, where the helicity of light polarization represents the spin degree of freedom for spin–momentum coupling, the optical Rashba effect is manifested by the splitting of optical states with opposite chirality in the momentum space. Previous realizations of the optical Rashba effect relied on passive devices determining the surface plasmon or light propagation inside nanostructures, or the directional emission of chiral luminescence when hybridized with light‐emitting media. An active device underpinned by the optical Rashba effect is demonstrated here, in which a monolithic halide perovskite metasurface emits highly directional chiral photoluminescence. An all‐dielectric metasurface design with broken in‐plane inversion symmetry is directly embossed into the high‐refractive‐index, light‐emitting perovskite film, yielding a degree of circular polarization of photoluminescence of 60% at room temperature.

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“…The intensity of light extraction efficiency of LEDs has been enhanced using microlens arrays [ 65 , 66 , 67 ], surface roughening [ 68 , 69 , 70 , 71 ], photonic crystal patterning [ 72 , 73 ], patterned substrates [ 74 , 75 ], and surface plasmons [ 76 , 77 , 78 ]. However, metasurfaces including MLs are difficult to use for LED sources, as the emitted light is incoherent [ 79 , 80 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Luminous Intensity Emission from Incoherent LED Light Sources within the Detection Angle of 10° Using Metalenses

et al. 2022

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In this work, we present metalenses (MLs) designed to enhance the luminous intensity of incoherent light-emitting diodes (LEDs) within the detection angles of 0° and 10°. The detection angle of 0° refers to the center of the LED. Because the light emitted from LEDs is incoherent and expressed as a surface light source, they are numerically described as a set of point sources and calculated using incoherent summation. The titanium dioxide (TiO2) and amorphous silicon (a-Si) nanohole meta-atoms are designed; however, the full 2π phase coverage is not reached. Nevertheless, because the phase modulation at the edge of the ML is important, an ML is successfully designed. The typical phase profile of the ML enhances the luminous intensity at the center, and the phase profile is modified to increase the luminous intensity in the target detection angle region. Far field simulations are conducted to calculate the luminous intensity after 25 m of propagation. We demonstrate an enhancement of the luminous intensity at the center by 8551% and 2115% using TiO2 and a-Si MLs, respectively. Meanwhile, the TiO2 and a-Si MLs with the modified phase profiles enhance the luminous intensity within the detection angle of 10° by 263% and 30%, respectively.

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Unidirectional luminescence from InGaN/GaN quantum-well metasurfaces

Cited by 72 publications

References 50 publications

The road to atomically thin metasurface optics

The road to atomically thin metasurface optics

Optical Rashba Effect in a Light‐Emitting Perovskite Metasurface

Enhancement of Luminous Intensity Emission from Incoherent LED Light Sources within the Detection Angle of 10° Using Metalenses

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