Volume 16, Issue 26 2000239
Full Paper

Hyperboloid-Drum Microdisk Laser Biosensors for Ultrasensitive Detection of Human IgG

Zhihe Guo

Zhihe Guo

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

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Yingchun Qin

Yingchun Qin

National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093 China

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Peizong Chen

Peizong Chen

State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433 China

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Jinliang Hu

Jinliang Hu

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

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Yi Zhou

Yi Zhou

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

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Xuyang Zhao

Xuyang Zhao

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

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Zhiran Liu

Zhiran Liu

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

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Yiyan Fei

Yiyan Fei

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

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Xiaoshun Jiang

Corresponding Author

Xiaoshun Jiang

National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093 China

E-mail: [email protected], [email protected]

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Xiang Wu

Corresponding Author

Xiang Wu

Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, 200433 China

E-mail: [email protected], [email protected]

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First published: 08 June 2020
Citations: 46

Abstract

Whispering gallery mode (WGM) microresonators have been used as optical sensors in fundamental research and practical applications. The majority of WGM sensors are passive resonators that require complex systems, thereby limiting their practicality. Active resonators enable the remote excitation and collection of WGM-modulated fluorescence spectra, without requiring complex systems, and can be used as alternatives to passive microresonators. This paper demonstrates an active microresonator, which is a microdisk laser in a hyperboloid-drum (HD) shape. The HD microdisk lasers are a combination of a rhodamine B-doped photoresist and a silica microdisk. These HD microdisk lasers can be utilized for the detection of label-free biomolecules. The biomolecule concentration can be as low as 1 ag mL−1, whereas the theoretical detection limit of the biosensor for human IgG in phosphate buffer saline is 9 ag mL−1 (0.06 aM). Additionally, the biosensors are able to detect biomolecules in an artificial serum, with a theoretical detection limit of 9 ag mL−1 (0.06 aM). These results are approximately four orders of magnitude more sensitive than those for the typical active WGM biosensors. The proposed HD microdisk laser biosensors show enormous detection potential for biomarkers in protein secretions or body fluids.

Conflict of Interest

The authors declare no conflict of interest.

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