Nano force sensing using symmetric double stage micro resonator

作者：Bahadoran Mahdi^*; Noorden Ahmad Fakhrurrazi Ahmad; Chaudhary Kashif; Aziz Muhammad Safwan; Ali Jalil; Yupapin Preecha

来源：Measurement, 2014, 58: 215-220.

DOI：10.1016/j.measurement.2014.08.044

• Vernier effect
• Force sensor
• Signal flow graph method
• Coupler loss

A new approach is proposed to improve a graphical approach with considering intensity coupling loss coefficients in the analytical derivation of the optical transfer functions for a symmetric double stage vertically coupled microring resonator. An optimum transmission coupling condition is determined with considering terms of couplers intensity loss which leads to low insertion loss of 1.2 dB, finesse of 1525, the out of band rejection ratio of 61.8 dB. The resonating system is used as an optical force sensing system to make the benefit of the accuracy of measurements in micro and nano scales. The sensitivity of proposed force sensor in terms of wavelength-shift is 33 nm/nN and the limit of detection is 1.6 x 10 (2) nN. The proposed sensing system has the advantages of self-calibration and the low power consumption due to the low intensity.

• 出版日期2014-12