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Title: High order magnetic and electric resonant modes of split ring resonator metasurface arrays for strong enhancement of mid-infrared photodetection
Authors: Tong, Jinchao
Suo, Fei
Tobing, Landobasa Y. M.
Yao, Niangjuan
Zhang, Dawei
Huang, Zhiming
Zhang, Dao Hua
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Tong, J., Suo, F., Tobing, L. Y. M., Yao, N., Zhang, D., Huang, Z. & Zhang, D. H. (2020). High order magnetic and electric resonant modes of split ring resonator metasurface arrays for strong enhancement of mid-infrared photodetection. ACS Applied Materials and Interfaces, 12(7), 8835-8844.
Project: SERC 1720700038
SERC A1883c0002
RG177/ 17
Journal: ACS Applied Materials and Interfaces 
Abstract: Integration of photonic nanostructures with optoelectrical semiconductors offers great potential of developing high sensitivity and multifunctional photodetectors enabled by enhanced light-matter interactions. Split ring resonator (SRR) array which resonates at different resonant modes, including fundamental magnetic mode (m0), high order magnetic mode (m1), and electric (e) mode has been investigated because of the high potential for different applications. In this work, we study photodetection enhancement of these resonant modes of U-shape SRR arrays in the mid-infrared (2-5 μm) range and report, for the first time, the strong enhancement of photodetection by superimposition of m1 and e modes in an integrated photodetector consisting of a U-shape SRR array and an InAsSb-based heterojunction photodiode. We observe that the m1 mode in the SRR array shows the strongest enhancement of photocurrent, sequentially followed by the e and m0 modes. Using superimposed m1 and e modes, about an order of enhancement in room temperature detectivity (to about 2.0 × 1010 Jones) is achieved under zero-power-supply without sacrificing the response speed. In addition, polarization-resolved photoresponse between m1 and e modes and tunable enhancement of photoresponse are also demonstrated. The remarkable enhancement makes mid-infrared photodetection possible to operate at room temperature.
ISSN: 1944-8244
DOI: 10.1021/acsami.9b19187
Rights: © 2020 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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