Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/99685
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Type: | Journal article |
Title: | Refractometry with ultralow detection limit using anisotropic whispering-gallery-mode resonators |
Author: | Weng, W. Anstie, J.D. Luiten, A.N. |
Citation: | Physical Review Applied, 2015; 3(4):044015-1-044015-6 |
Publisher: | American Physical Society |
Issue Date: | 2015 |
ISSN: | 2331-7019 2331-7019 |
Statement of Responsibility: | Wenle Weng, James D. Anstie, and Andre N. Luiten |
Abstract: | The intrinsic sensitivity of whispering-gallery-mode resonators aimed at measuring refractive index can be extremely high, although their practical performance is compromised by temperature fluctuations that masquerade as refractive-index changes. We present a triple-mode approach that delivers simultaneous and independent sensing of temperature and refractive-index changes in the same resonator. The frequency difference between two orthogonally polarized modes is used to sense temperature which is then actively stabilized to ∼1 μK over 15 minutes. We then detect a frequency difference between two modes of different wavelengths to obtain a refractive-index measurement that is free of temperature fluctuations. This triple-mode technique delivers a state-of-the-art detection limit of 8×10¯⁹ refractive-index units, despite the resonator size being 100 times larger than that typically used for sensitive refractometric sensing. |
Rights: | © 2015 American Physical Society |
DOI: | 10.1103/PhysRevApplied.3.044015 |
Grant ID: | http://purl.org/au-research/grants/arc/DP0877938 http://purl.org/au-research/grants/arc/FT0991631 http://purl.org/au-research/grants/arc/LE110100054 http://purl.org/au-research/grants/arc/LE100100009 |
Published version: | http://dx.doi.org/10.1103/physrevapplied.3.044015 |
Appears in Collections: | Aurora harvest 3 IPAS publications |
Files in This Item:
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hdl_99685.pdf | Published version | 907.5 kB | Adobe PDF | View/Open |
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