Conjugated topological cavity-states in one-dimensional photonic systems and bio-sensing applications

Yu-Chuan Lin; Yu-Zhe Zhang; Shih-Hung Cheng; Chun-Ying Huang; Wen-Jeng Hsueh

doi:10.1016/j.isci.2023.106400

Conjugated topological cavity-states in one-dimensional photonic systems and bio-sensing applications

iScience. 2023 Mar 15;26(4):106400. doi: 10.1016/j.isci.2023.106400. eCollection 2023 Apr 21.

Authors

Yu-Chuan Lin^{1

2}, Yu-Zhe Zhang^{1

2}, Shih-Hung Cheng¹, Chun-Ying Huang³, Wen-Jeng Hsueh¹

Affiliations

¹ Photonics Group, Department of Engineering Science and Ocean Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10660, Taiwan.
² Taiwan Instrument Research Institute, National Applied Research Laboratories, 20, R&D Road VI, Hsinchu Science Park, Hsinchu 300092, Taiwan.
³ Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, 1, Daxue Road, Puli 54561, Taiwan.

Abstract

Traditional photonic systems are endowed with brand new properties owing to the addition of topological physics with light. A conjugated topological cavity-states (CTCS) in one-dimensional photonic systems is presented, which has not only robust light transport but also ultra-high performances, such as high quality factor (high-Q) and perfect transmission. This extraordinary CTCS can address the bottleneck of typical topological photonic systems, which can only achieve robust light transport without maintaining high performance. Furthermore, the CTCS is especially suitable for bio-photonic sensing with high resolution requirements. An ultra-sensitivity of 2000 nm/RIU and a high-Q of 10⁹ for detecting the concentration of SARS-CoV-2 S-glycoprotein solution are obtained. Notably, the CTCS not only opens new possibilities for advanced photonics but also paves the way for high performance in topological photonic devices.

Keywords: Photonics; Sensor system.