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Title: NEMS diaphragm sensors integrated with triple-nano-ring resonator
Authors: Li, B.
Lee, C. 
Keywords: Filters
Photonic crystal
Ring resonators
Issue Date: Dec-2011
Citation: Li, B., Lee, C. (2011-12). NEMS diaphragm sensors integrated with triple-nano-ring resonator. Sensors and Actuators, A: Physical 172 (1) : 61-68. ScholarBank@NUS Repository.
Abstract: Two types of circular diaphragm, made by Si and Si/SiO2, integrated with hexagonal photonic crystal (PhC) lattice with triple-nano-ring (TNR) resonator created at the centre are proposed as nano-scale force and pressure sensor. The optimized channel drop effect of the TNR resonator brings a strong forward drop resonant peak in both the cases and with Q-factor of 1602 and 1737, respectively. The resonant wavelength peak experience red shifts upon the applied load on the circular diaphragm along the normal direction, in terms of a 2nd-order polynomial relationship. The devices can detect a wide range of applied load. Si diaphragm based micro force sensor gives minimum detectable force of 0.847 μN in the region of applied force from 10 to 20 μN. Si/SiO2 diaphragm based pressure sensor gives minimum detectable pressure of 4.17 MPa in the region of applied pressure from 20 to 40 MPa. From the derived wavelength shift versus a given centre displacement of the diaphragm, Si diaphragm based sensor shows higher sensitivity than Si/SiO 2 diaphragm sensor. © 2011 Elsevier B.V. All rights reserved.
Source Title: Sensors and Actuators, A: Physical
ISSN: 09244247
DOI: 10.1016/j.sna.2011.02.028
Appears in Collections:Staff Publications

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