Nonscattering Photodetection in the Propagation of Unidirectional Surface Plasmon Polaritons Embedded with Graphene

Chia-Hung Wu; Chih-Jen Ku; Min-Wen Yu; Jhen-Hong Yang; Tien-Chang Lu; Tzy-Rong Lin; Chan-Shan Yang; Kuo-Ping Chen

doi:10.1021/acsami.2c03214

Nonscattering Photodetection in the Propagation of Unidirectional Surface Plasmon Polaritons Embedded with Graphene

ACS Appl Mater Interfaces. 2022 Jul 6;14(26):30299-30305. doi: 10.1021/acsami.2c03214. Epub 2022 Jun 8.

Authors

Chia-Hung Wu¹, Chih-Jen Ku², Min-Wen Yu³, Jhen-Hong Yang³, Tien-Chang Lu⁴, Tzy-Rong Lin^{5

6}, Chan-Shan Yang^{7

8}, Kuo-Ping Chen²

Affiliations

¹ Institute of Photonic System, 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 College of Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan 71150, Taiwan.
⁴ Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
⁵ Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.
⁶ Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.
⁷ Institute and Undergraduate Program of Electro-Optical Engineering, National Taiwan Normal University, Taipei 11677, Taiwan.
⁸ Micro/Nano Device Inspection and Research Center, National Taiwan Normal University, Taipei 106, Taiwan.

PMID: 35675390
DOI: 10.1021/acsami.2c03214

Abstract

Recently, nanoscale light manipulation using surface plasmon polaritons (SPPs) has received considerable research attention. The conventional method of detecting SPPs is through light scattering or using bulky Si or Ge photodetectors. However, these bulky systems limit the application of nanophotonic circuits. In this study, the light-matter interaction between graphene and SPP was investigated. For realizing an improved integration in nanocircuits, single-layer graphene was added to asymmetric SPP nanoantenna arrays for nonscattering detection in the near field. The developed device is capable of detecting the controlled propagation of SPPs with a photoresponsivity of 15 mA/W, which paves the way for the new-generation on-chip optical communication.

Keywords: graphene; optoelectronic; photodetector; surface plasmon polariton; unidirectional propagation.