Ultraviolet Interband Plasmonics With Si Nanostructures

Dong, Zhaogang; Wang, Tao; Chi, Xiao; Ho, Jinfa; Tserkezis, Christos; Yap, Sherry Lee Koon; Rusydi, Andrivo; Tjiptoharsono, Febiana; Thian, Dickson; Mortensen, N. Asger; Yang, Joel K. W.

doi:10.1021/acs.nanolett.9b03243

Cited by 49 publications

(39 citation statements)

References 53 publications

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“…From the material side, silicon is extremely stable and compatible to the modern CMOS technologies, naturally matching the requirements on mass-manufacturability and long-time durability [18][19][20][32][33][34] . The sophisticated design on nanostructures gives the possibility of concealing its shortage and improving the color impression 20,[35][36][37] . In addition, the large refractive index of Si enables simple structures for highperformance structural color, essential for the cost-effective nanofabrication 20,38,39 .…”

Section: Resultsmentioning

confidence: 99%

All-dielectric metasurface for high-performance structural color

et al. 2020

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The achievement of structural color has shown advantages in large-gamut, high-saturation, high-brightness, and high-resolution. While a large number of plasmonic/dielectric nanostructures have been developed for structural color, the previous approaches fail to match all the above criterion simultaneously. Herein we utilize the Si metasurface to demonstrate an all-in-one solution for structural color. Due to the intrinsic material loss, the conventional Si metasurfaces only have a broadband reflection and a small gamut of 78% of sRGB. Once they are combined with a refractive index matching layer, the reflection bandwidth and the background reflection are both reduced, improving the brightness and the color purity significantly. Consequently, the experimentally demonstrated gamut has been increased to around 181.8% of sRGB, 135.6% of Adobe RGB, and 97.2% of Rec.2020. Meanwhile, high refractive index of silicon preserves the distinct color in a pixel with 2 × 2 array of nanodisks, giving a diffraction-limit resolution.

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Section: Resultsmentioning

confidence: 99%

All-dielectric metasurface for high-performance structural color

et al. 2020

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“…Nonlocal effects exist also in this situation, which have been explored in hydrodynamic models [69,70,337]. In passing, we note that even undoped semiconductors can host nonlocal phenomena associated with excitons [338], and also interband transitions can resemble plasmonic behavior [74].…”

Section: Quantum Plasmons In Low-dimensional Systemsmentioning

confidence: 98%

“…In passing, we note that there is now also growing attention to plasmon-like behavior associated with negative dielectric function values. This can be due to electronic interband transitions, including the possible interband response in graphene [30,67,73] and in silicon [74], while the negative response may also be caused by phonon polaritons, such as in polar dielectrics [75].…”

Section: Plasmonicsmentioning

confidence: 99%

Mesoscopic electrodynamics at metal surfaces

Mortensen

2021

Nanophotonics

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Plasmonic phenomena in metals are commonly explored within the framework of classical electrodynamics and semiclassical models for the interactions of light with free-electron matter. The more detailed understanding of mesoscopic electrodynamics at metal surfaces is, however, becoming increasingly important for both fundamental developments in quantum plasmonics and potential applications in emerging light-based quantum technologies. The review offers a colloquial introduction to recent mesoscopic formalism, ranging from quantum-corrected hydrodynamics to microscopic surface-response formalism, offering also perspectives on possible future avenues.

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“…The dielectrics of the c-Si and ITO were from Palik, [37] and the dielectrics of the a-Si and the perovskite were from the literature. [29,38]…”

Section: Methodsmentioning

confidence: 99%

Polarizable High‐Index Nanoparticles Used for Light‐Induced Crystal‐Silicon Passivation and Dielectric Antenna for High‐Efficiency Solar Cell

et al. 2021

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Heterojunction crystal‐silicon (c‐Si) solar cells generate current from harvesting light via sweeping excited carriers away under built‐in asymmetry through amorphous silicon layers. However, loss of energy beyond the bandgap is known to hinder their efficiency. Herein, a strategy is provided to convert short‐wavelength energy into a polarization electrical field and the light dielectric antenna effect, where enhanced surface passivation and carrier collection occur simultaneously. By depositing an ultrathin polarizable nanoparticle layer on a transparent conducting oxide (TCO), a light‐induced electrical field is built up by light‐harvesting accumulation, which benefits for c‐Si surface passivation. An enchanting open‐circuit voltage (Voc) of 736.6 mV for the light‐induced field‐effect solar cell is achieved. In addition, the high‐index dielectric nanoparticles generate more photons to be absorbed in the long‐wavelength in c‐Si solar cells, which results in enhanced short‐circuit current (Jsc). As a result, benefiting from the light‐induced building‐up extra field and dielectric antenna effect, the device yields a power conversion efficiency of 22.41%, with the maximal improvement of Voc (≈4 mV), Jsc (≈0.4 mA cm−2), and fill factor (≈1%), respectively. This work provides a strategy to enhance solar cell efficiency by continuously harvesting beyond‐bandgap light to offer an additional asymmetrical field and the light antenna effect.

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Ultraviolet Interband Plasmonics With Si Nanostructures

Cited by 49 publications

References 53 publications

All-dielectric metasurface for high-performance structural color

All-dielectric metasurface for high-performance structural color

Mesoscopic electrodynamics at metal surfaces

Polarizable High‐Index Nanoparticles Used for Light‐Induced Crystal‐Silicon Passivation and Dielectric Antenna for High‐Efficiency Solar Cell

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