Open AccessLarge-capacity high-resolution optomechanical mass sensing based on free-space optical cavity
Author(s) -
Da In Song,
Jae-Woo Choi,
Deokhyun Kim,
Myeong Soo Kang
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.031567
Subject(s) - optics , wedge (geometry) , detector , displacement (psychology) , materials science , prism , dynamic range , resolution (logic) , physics , linearity , optoelectronics , computer science , psychology , artificial intelligence , psychotherapist , quantum mechanics
Mass sensing offering both a broad detection range and a high resolving power is essential for quantitative precision content analysis and high-yield mass production of various kinds of materials. Here, we propose and successfully demonstrate a novel type of simple low-cost optomechanical mass sensing employing an optical displacement detector that consists of a free-space Fabry-Pérot optical cavity and an intra-cavity wedge prism pair, which provides an enhanced resolution and an extended capacity simultaneously. By implementing the null-method-based scheme of mass measurement, we achieve a resolution higher than 5000:1 (mass range from <200 mg to >1 kg) and an excellent linearity of R 2 >0.99998 in the prototype demonstration.