Near-Field Photodetection in Direction Tunable Surface Plasmon Polaritons Waveguides Embedded with Graphene

Chia-Hung Wu; Chih-Jen Ku; Min-Wen Yu; Jhen-Hong Yang; Pei-Yuan Wu; Chen-Bin Huang; Tien-Chang Lu; Jer-Shing Huang; Satoshi Ishii; Kuo-Ping Chen

doi:10.1002/advs.202302707

Near-Field Photodetection in Direction Tunable Surface Plasmon Polaritons Waveguides Embedded with Graphene

Adv Sci (Weinh). 2023 Oct;10(30):e2302707. doi: 10.1002/advs.202302707. Epub 2023 Sep 3.

Authors

Chia-Hung Wu¹, Chih-Jen Ku², Min-Wen Yu¹, Jhen-Hong Yang¹, Pei-Yuan Wu³, Chen-Bin Huang³, Tien-Chang Lu⁴, Jer-Shing Huang^{5

6

7

8}, Satoshi Ishii⁹, Kuo-Ping Chen^{2

3}

Affiliations

¹ College of Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 71150, Taiwan.
² Institute of Imaging and Biomedical Photonics, College of Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 71150, Taiwan.
³ Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, 300, Taiwan.
⁴ Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
⁵ Leibniz Institute of Photonic Technology, Albert-Einstein Straße 9, 07745, Jena, Germany.
⁶ Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, D-07743, Jena, Germany.
⁷ Research Center for Applied Sciences, Academia Sinica, 128 Academia Road, Sec. 2, Nankang District, Taipei, 11529, Taiwan.
⁸ Department of Electrophysics, National Yang Ming Chiao Tung University, No. 1001 Daxue Rd, East District, Hsinchu, 30010, Taiwan.
⁹ Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.

Abstract

2D materials have manifested themselves as key components toward compact integrated circuits. Because of their capability to circumvent the diffraction limit, light manipulation using surface plasmon polaritons (SPPs) is highly-valued. In this study, plasmonic photodetection using graphene as a 2D material is investigated. Non-scattering near-field detection of SPPs is implemented via monolayer graphene stacked under an SPP waveguide with a symmetric antenna. Energy conversion between radiation power and electrical signals is utilized for the photovoltaic and photoconductive processes of the gold-graphene interface and biased electrodes, measuring a maximum photoresponsivity of 29.2 mA W^-1 . The generated photocurrent is altered under the polarization state of the input light, producing a 400% contrast between the maximum and minimum signals. This result is universally applicable to all on-chip optoelectronic circuits.

Keywords: graphene; photodetectors; surface plasmon polaritons; unidirectional propagation; waveguides.

Abstract

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