Biomaterial, such as proteins and deoxyribonucleic acid (DNA), which have many advantages such as biocompatibility and biodegradability, have been widely adopted as photonic device materials. In this study, we proposed and experimentally demonstrated an all-biomaterial whispering-gallery-mode (WGM) microbottle resonator. The quality factor of the fabricated protein microbottle resonator is on the order of 105. In addition, the entire process for preparing microbottle is simple and low-cost. Our work will open a door to explore various biomaterial and different bio-photonic device for biomedical applications.
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