scholarly journals Absorption enhancement of thin layer black phosphorous in the mid-infrared with an all-dielectric metasurface

2021 ◽  
Vol 11 (4) ◽  
pp. 1158
Author(s):  
Nan Zhang ◽  
Guanhai Li ◽  
Kai Ou ◽  
Xiaoyan Li ◽  
Jin Chen ◽  
...  
Keyword(s):  
Thin Layer ◽  
Absorption Enhancement ◽  
Mid Infrared ◽  
Black Phosphorous ◽  
Dielectric Metasurface

Mid-infrared polarization devices based on the double-phase modulating dielectric metasurface

2017 ◽  
Vol 50 (25) ◽  
pp. 254001 ◽  
Author(s):  
Zhongyi Guo ◽  
Lihua Tian ◽  
Fei Shen ◽  
Hongping Zhou ◽  
Kai Guo
Keyword(s):  
Mid Infrared ◽  
Double Phase ◽  
Dielectric Metasurface

Design of mid-infrared dielectric metasurface based on cross-like meta-atom

2020 ◽  
pp. 126370
Author(s):  
Xueshen Li ◽  
Shouqian Chen ◽  
Jiaqian Yu ◽  
Xiaotian Shi ◽  
Zhigang Fan
Keyword(s):  
Mid Infrared ◽  
Meta Atom ◽  
Dielectric Metasurface

scholarly journals Dielectric Metasurface-Based High-Efficiency Mid-Infrared Optical Filter

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 938 ◽  
Author(s):  
Fei Shen ◽  
Qianlong Kang ◽  
Jingjing Wang ◽  
Kai Guo ◽  
Qingfeng Zhou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Incident Angle ◽  
Optical Filter ◽  
Optical Loss ◽  
Mid Infrared ◽  
Dipole Resonance ◽  
Mode Decomposition ◽  
Wide Range ◽  
Si Nanodisk ◽  
Dielectric Metasurface

Dielectric nanoresonantors may generate both electric and magnetic Mie resonances with low optical loss, thereby offering highly efficient paths for obtaining integrated optical devices. In this paper, we propose and design an optical filter with a high working efficiency in the mid-infrared (mid-IR) range, based on an all-dielectric metasurface composed of silicon (Si) nanodisk arrays. We numerically demonstrate that, by increasing the diameter of the Si nanodisk, the range of the proposed reflective optical filter could effectively cover a wide range of operation wavelengths, from 3.8 μm to 4.7 μm, with the reflection efficiencies reaching to almost 100%. The electromagnetic eigen-mode decomposition of the silicon nanodisk shows that the proposed optical filter is based on the excitation of the electric dipole resonance. In addition, we demonstrate that the proposed filter has other important advantages of polarization-independence and incident-angle independence, ranging from 0° to 20° at the resonance dip, which can be used in a broad range of applications, such as sensing, imaging, and energy harvesting.

scholarly journals Visible to Mid-infrared Waveband Photodetector Based on Insulator Capped Asymmetry Black Phosphorous

2021 ◽  
Vol 9 ◽  
Author(s):  
Qi Han ◽  
Yadong Jiang ◽  
Jiayue Han ◽  
Xiang Dong ◽  
Jun Gou
Keyword(s):  
Band Gap ◽  
Dark Current ◽  
Near Infrared ◽  
Photothermal Effect ◽  
Saturable Absorption ◽  
Infrared Band ◽  
Mid Infrared ◽  
Infrared Wavelength ◽  
Black Phosphorous ◽  
Harvesting Process

Processing layer-dependent direct band gap and good absorption coefficient especially in the mid-infrared band, black phosphorous is believed to make a contribution superior to that of graphene in broadband photodetectors. The narrow band gap of 0.3 eV for bulk black phosphorous helps to absorb infrared radiation while a relatively large dark current under zero gate voltage is inevitable. Few layer black phosphorous sheets with asymmetrical thickness sealed in an insulator for protection is designed and explored for photosensitive mechanism in this work. Saturable absorption dominates the light harvesting process in visible light detection and thus limits maximum photocurrent to 3.3 and 1.4 μA for 520 and 650 nm lasers with a dark current of 0.7 μA. While in near-infrared wavelength, a responsivity of 0.12 A/W is inducted for 808 nm free of adsorption saturation even if the incident power is increased to 200 mW/cm2. Discrimination for the origin of the photo-response in short wavelength is conducted and the abnormal negative and nearly constant photocurrent in mid-infrared, irrelevant to inhomogeneous thickness, reveals the photothermal effect in a black phosphorous sheet. This work unravels various photoelectric features in black phosphorous and paves the way to designing more outstanding broadband photodetectors based on black phosphorous.

High-efficiency mid-infrared transmissive Huygens dielectric metasurface

2021 ◽  
Author(s):  
ruirui song ◽  
Wenbin Li ◽  
Qinling Deng ◽  
Shaolin Zhou
Keyword(s):  
High Efficiency ◽  
Mid Infrared ◽  
Dielectric Metasurface

Near-infrared free carrier absorption enhancement of heavily doped silicon in all-dielectric metasurface

2020 ◽  
Vol 117 (13) ◽  
pp. 134101
Author(s):  
Honghao Yu ◽  
Qing Xiong ◽  
Hong Wang ◽  
Ye Zhang ◽  
Yi Wang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Free Carrier ◽  
Absorption Enhancement ◽  
Free Carrier Absorption ◽  
Doped Silicon ◽  
Carrier Absorption ◽  
Heavily Doped ◽  
Dielectric Metasurface

scholarly journals All-dielectric metasurface filters for mid-infrared range

2018 ◽  
Vol 1092 ◽  
pp. 012023
Author(s):  
Zh O Dombrovskaya ◽  
A V Rybina ◽  
A A Belov ◽  
A N Bogolyubov
Keyword(s):  
Infrared Range ◽  
Mid Infrared ◽  
Dielectric Metasurface
Sign in / Sign up

Export Citation Format

Share Document