Details

Autor(en) / Beteiligte

• Tong, Jinchao
• Suo, Fei
• Tobing, Landobasa Y M
• Xu, Zhengji
• Xiong, Yao
• Zhang, Dao Hua

Titel

Rotated fourfold U-shape metasurface for polarization-insensitive strong enhancement of mid-infrared photodetection

Ist Teil von

• Optics express, 2020-02, Vol.28 (3), p.4225-4233

Ort / Verlag

United States

Erscheinungsjahr

2020

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Metasurface with thin planar resonant elements offers great capability in manipulating electromagnetic waves and their interaction with semiconductors. Split-ring resonator (SRR), as the basic building block, has been extensively investigated for myriad applications owing to its multiple electric and magnetic resonant modes. In this work, we report a rotated fourfold U-shape SRR metasurface for polarization-insensitive strong enhancement of mid-infrared photodetection. The integrated photodetector consists of a rotated fourfold SRR array and an InAsSb based heterojunction photodiode. A photosensitivity enhancement factor as high as 11 has been achieved by adoption of superimposed high order magnetic and electric resonant modes in the SRR metasurface. This work provides a promising pathway for exploring high performance polarization-insensitive photodetection in different electromagnetic wave ranges.