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Updated: May 23, 2026

Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Frequency locked micro disk resonator for real time and precise monitoring of refractive index
Liron Stern1, Ilya Goykhman, Boris Desiatov
1Department of Applied Physics, The Benin School of Engineering and Computer Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
Abstract:
We experimentally demonstrate a frequency modulation locked servo loop, locked to a resonance line of an on-chip microdisk resonator in a silicon nitride platform. By using this approach, we demonstrate real-time monitoring of refractive index variations with a precision approaching 10(-7) RIU, using a moderate Q factor of 10(4). The approach can be applied for intensity independent, dynamic and precise index of refraction monitoring for biosensing applications.

