High-Q silk fibroin whispering gallery microresonator

Linhua Xu, Xuefeng Jiang, Guangming Zhao, Ding Ma, Hu Tao, Zhiwen Liu, Fiorenzo G. Omenetto, Lan Yang

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


We have experimentally demonstrated an on-chip all-silk fibroin whispering gallery mode microresonator by using a simple molding and solution-casting technique. The quality factors of the fabricated silk protein microresonators are on the order of 105. A high-sensitivity thermal sensor was realized in this silk fibroin microtoroid with a sensitivity of -1.17 nm/K, that is 8 times higher than previous WGM resonator-based thermal sensors. This opens the way to fabricate biodegradable and biocompatible protein based microresonators on a flexible chip for biophotonics applications.

Original languageEnglish (US)
Pages (from-to)20825-20830
Number of pages6
JournalOptics Express
Issue number18
StatePublished - Sep 5 2016

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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