scholarly journals Spatial refractive index sensor using whispering gallery modes in an optically trapped microsphere

2007 ◽  
Vol 90 (16) ◽  
pp. 161101 ◽  
Author(s):  
Peter Zijlstra ◽  
Karen L. van der Molen ◽  
Allard P. Mosk
Keyword(s):  
Refractive Index ◽  
Whispering Gallery Modes ◽  
Refractive Index Sensor ◽  
Whispering Gallery ◽  
Optically Trapped

FDTD Simulation: Refractive Index and Single-Object Sensing Using a Whispering-Gallery-Modes Microring Resonator

2018 ◽  
Vol 36 (9) ◽  
pp. 1775-1781 ◽  
Author(s):  
Zhi-Hong Zhang ◽  
Si-Hui Shang ◽  
Mu-Neng Li ◽  
Shao-Yi Wu ◽  
Qin-Sheng Zhu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Microring Resonator ◽  
Whispering Gallery Modes ◽  
Fdtd Simulation ◽  
Single Object ◽  
Whispering Gallery

scholarly journals FDTD Simulation: Simultaneous Measurement of the Refractive Index and the Pressure Using Microdisk Resonator with Two Whispering-Gallery Modes

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3955
Author(s):  
Ping Zhang ◽  
Dongyue He ◽  
Chen Zhang ◽  
Zhiruo Yan
Keyword(s):  
Refractive Index ◽  
Second Order ◽  
Whispering Gallery Modes ◽  
Fdtd Simulation ◽  
Pressure Sensitivity ◽  
Sensitivity Matrix ◽  
Whispering Gallery ◽  
Sensing Applications ◽  
Novel Approach ◽  
Microdisk Resonator

In this paper, an approach to measure both the refractive index (RI) and the pressure simultaneously using two Whispering-Gallery Modes (WGMs) in a microdisk resonator is theoretically proposed. Due to the difference in the energy distribution of the first and second order WGMs, the sensitivity of two modes toward the variation of RI and pressure applied to the device show differences. An RI sensitivity of 29.07 nm/RIU and pressure sensitivity of 0.576 pm/kPa for WGM (1,36), and an RI sensitivity of 38.68 nm/RIU and a pressure sensitivity of 0.589 pm/kPa for WGM (2,28) are obtained through the 3D finite-difference time-domain (3D-FDTD) simulation. Dual parametric sensing can be achieved by solving the second-order inverse sensitivity matrix. Therefore, strain–optical coupling behavior is effectively eliminated. The dual sensing scheme we proposed provides a novel approach to overcome the difficulty of multi-sensing applications based on the flexible photonic device.

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