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
Affiliations
Yu-Chuan Lin
Photonics Group, Department of Engineering Science and Ocean Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10660, Taiwan; Taiwan Instrument Research Institute, National Applied Research Laboratories, 20, R&D Road VI, Hsinchu Science Park, Hsinchu 300092, Taiwan; Corresponding author
Yu-Zhe Zhang
Photonics Group, Department of Engineering Science and Ocean Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10660, Taiwan; Taiwan Instrument Research Institute, National Applied Research Laboratories, 20, R&D Road VI, Hsinchu Science Park, Hsinchu 300092, Taiwan
Shih-Hung Cheng
Photonics Group, Department of Engineering Science and Ocean Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10660, Taiwan
Chun-Ying Huang
Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, 1, Daxue Road, Puli 54561, Taiwan
Wen-Jeng Hsueh
Photonics Group, Department of Engineering Science and Ocean Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei 10660, Taiwan; Corresponding author
Summary: 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.
