Broadband optical absorption based on single-sized metal-dielectric-metal plasmonic nanostructures with high-ε″ metals

2017 ◽  
Vol 110 (10) ◽  
pp. 101101 ◽  
Author(s):  
Wei Wang ◽  
Yurui Qu ◽  
Kaikai Du ◽  
Songang Bai ◽  
Jingyi Tian ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Plasmonic Nanostructures

scholarly journals Planar narrowband Tamm plasmon-based hot-electron photodetectors with double distributed Bragg reflectors

Nano Express ◽  
2021 ◽  
Author(s):  
Weijia Shao ◽  
Tingting Liu
Keyword(s):  
Optical Absorption ◽  
Gold Film ◽  
Cost Effective ◽  
Plasmonic Nanostructures ◽  
Bragg Reflectors ◽  
Hot Electron ◽  
Distributed Bragg Reflectors ◽  
Large Area ◽  
Electron Collection ◽  
Sustained Performance

Abstract Hot-electron photodetectors (HE PDs) are attracting a great deal of attention from plasmonic community. Many efficient HE PDs with various plasmonic nanostructures have been demonstrated, but their preparations usually rely on complicated and costly fabrication techniques. Planar HE PDs are viewed as potential candidates of cost-effective and large-area applications, but they likely fail in the simultaneous achievement of outstanding optical absorption and hot-electron collection. To reconcile the contradiction between optical and electrical requirements, herein, we propose a planar HE PD based on optical Tamm plasmons (TPs) consisted of an ultrathin gold film (10 nm) sandwiched between two distributed Bragg reflectors (DBRs). Simulated results show that strong optical absorption (>0.95) in the ultrathin Au film is realized. Electrical calculations show that the predicted peak photo-responsivity of proposed HE PD with double DBRs is over two times larger than that of conventional single-DBR HE PD. Moreover, the planar dual-DBR HE PDs exhibit a narrowband photodetection functionality and sustained performance under oblique incidences. The optical nature associated with TP resonance is elaborated.

Directional optical absorption and scattering in conical plasmonic nanostructures

2019 ◽  
Vol 44 (9) ◽  
pp. 2212 ◽  
Author(s):  
Majid Goodarzi ◽  
Tavakol Pakizeh
Keyword(s):  
Optical Absorption ◽  
Plasmonic Nanostructures

scholarly journals Plasmonic Hybrids of MoS2 and 10-nm Nanogap Arrays for Photoluminescence Enhancement

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1109
Author(s):  
Yang Yang ◽  
Ruhao Pan ◽  
Shibing Tian ◽  
Changzhi Gu ◽  
Junjie Li
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Absorption ◽  
Localized Surface Plasmon Resonance ◽  
Photonic Devices ◽  
Localized Surface Plasmon ◽  
Plasmonic Nanostructures ◽  
Hybrid Nanostructure ◽  
Deposition Method ◽  
Monolayer Mos2 ◽  
Photoluminescence Enhancement

Monolayer MoS2 has attracted tremendous interest, in recent years, due to its novel physical properties and applications in optoelectronic and photonic devices. However, the nature of the atomic-thin thickness of monolayer MoS2 limits its optical absorption and emission, thereby hindering its optoelectronic applications. Hybridizing MoS2 by plasmonic nanostructures is a critical route to enhance its photoluminescence. In this work, the hybrid nanostructure has been proposed by transferring the monolayer MoS2 onto the surface of 10-nm-wide gold nanogap arrays fabricated using the shadow deposition method. By taking advantage of the localized surface plasmon resonance arising in the nanogaps, a photoluminescence enhancement of ~20-fold was achieved through adjusting the length of nanogaps. Our results demonstrate the feasibility of a giant photoluminescence enhancement for this hybrid of MoS2/10-nm nanogap arrays, promising its further applications in photodetectors, sensors, and emitters.

Optical absorption in PdH

1982 ◽  
Vol 43 (2) ◽  
pp. 323-328 ◽  
Author(s):  
M.A. Khan ◽  
R. Riedinger
Keyword(s):  
Optical Absorption
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