Polarization-independent dielectric metasurface for mid-infrared applications

2018 ◽  
Author(s):  
Mostafa Abdelsalam ◽  
Mohamed Swillam ◽  
Ahmed M. Mahmoud
Keyword(s):  
Mid Infrared ◽  
Dielectric Metasurface ◽  
Polarization Independent

Polarization-independent broadband achromatic metalens in the mid-infrared (3-5 μm) region

2021 ◽  
Author(s):  
Wenhui Xiong ◽  
Chenchen Sha ◽  
Jianping Ding
Keyword(s):  
Numerical Simulation ◽  
Infrared Imaging ◽  
Chromatic Aberration ◽  
Infrared Region ◽  
Mid Infrared ◽  
Light Manipulation ◽  
Wavefront Shaping ◽  
Polarization Independent

Abstract With superior capabilities for light manipulation and wavefront shaping, the metasurface recently has caught growing attention. However, the presence of chromatic aberration hinders metasurfaces, especially metalenses, from wider applications. Here, we design a polarization-independent broadband achromatic focusing metalens in the mid-infrared region, which covers continuous bands in 3-5 μm. Numerical simulation shows that different wavelengths can be focused to the same plane with a nearly diffraction-limited resolution, and can achieve an average focusing efficiency of nearly 70% in the whole bandwidth. We expect that our approach can underpin the development of integrated and mid-infrared imaging and detection.

3-micron wave band mid-infrared polarization-independent graphene modulator

2021 ◽  
Vol 136 (8) ◽  
Author(s):  
Rongguo Lu ◽  
Liming Shen ◽  
Yujiao Wang ◽  
Songwei Cai ◽  
Rui Lin ◽  
...  
Keyword(s):  
Wave Band ◽  
Mid Infrared ◽  
Polarization Independent

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 Angle- and polarization-independent mid-infrared narrowband optical filters using dense arrays of resonant cavities

2019 ◽  
Vol 27 (26) ◽  
pp. 37481 ◽  
Author(s):  
Ivan Avrutsky ◽  
Evan M. Smith ◽  
Shivashankar Vangala ◽  
Ricky Gibson ◽  
Joshua R. Hendrickson ◽  
...  
Keyword(s):  
Optical Filters ◽  
Resonant Cavities ◽  
Mid Infrared ◽  
Dense Arrays ◽  
Polarization Independent

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 Graphene-Based Polarization-Independent Mid-Infrared Electro-Absorption Modulator Integrated in a Chalcogenide Glass Waveguide

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Yong Zhou ◽  
Rongguo Lu ◽  
Guangbiao Wang ◽  
Jiangbo Lyu ◽  
Meng Tan ◽  
...  
Keyword(s):  
Extinction Ratio ◽  
Transverse Magnetic ◽  
Optical Modulator ◽  
Polarization Sensitivity ◽  
Mid Infrared ◽  
Graphene Layers ◽  
Sensitivity Loss ◽  
Polarization Insensitive ◽  
Glass Waveguide ◽  
Polarization Independent

AbstractA polarization-insensitive graphene-based mid-infrared optical modulator is presented that comprised SiO2/ Ge23Sb7S70, in which two graphene layers are embedded with a semiellipse layout to support transverse magnetic (TM) and transverse electric (TE) polarizing modes with identical absorption. The key performance index for the polarization independent modulator is polarization-sensitivity loss (PSL). The waveguide of our device just supports basic TE and TM modes, and the PSL between two modes is of < 0.24 dB. The model can offer extinction ratio (ER) more than 16 dB and insertion loss less than 1 dB. The operation spectrum ranges from 2 to 2.4 μm with optical bandwidth of 400 nm. The 3 dB modulation bandwidth is as high as 136 GHz based on theoretical calculation.

Sign in / Sign up

Export Citation Format

Share Document