Micro-displacement sensor based on high sensitivity photonic crystal

Abstract

In this paper, we present a micro-displacement sensor formed by the fixed and movable photonic crystal slabs. In this sensor, a waveguide was created by changing the radius of holes rather than removing them. At a proper operating wavelength, the structure could be used as the micro-displacement sensor. The results revealed that the micro-displacement sensor had a sensitivity of 3.6 μm⁻¹, Q-factor was nearly 180, and the sensing range was 0.0 μm–0.5 μm. The properties of the micro-displacement sensor are also analyzed theoretically and verified using the finite-difference time-domain (FDTD) method carried out using the software (Rsoft).

Keywords

Micro-displacement sensor / Q-factor / waveguide / sensitivity / FDTD / Lorentzian function

References

[1] Xu Z, Cao L, Gu C, He Q, Jin G. Micro-displacement sensor based on line-defect resonant cavity in photonic crystal. Optics Express, 2006, 14(1): 298-305.

[2] Yang D, Tian H, Ji Y. Micro-displacement sensor based on high-Q nanocavity in slot photonic crystal. Optical Engineering, 2011, 50(5): 544021-544026.

[3] Levy O, Steinberg B Z, Nathan M, Boag A. Ultrasensitive displacement sensing using photonic crystal waveguides. Applied Physics Letters, 2005, 86(10): 104102-104104.

[4] Olyaee S, Hamedi S, Dashtban Z. Design of electronic sections for nano-displacement measuring system. Frontiers of Optoelectronics in China, 2010, 3(4): 376-381.

[5] Olyaee S, Nejad S M. Design and simulation of velocity and displacement measurement system with subnanometer uncertainty based on a new stabilized laser Doppler-interferometer. The Arabian Journal for Science and Engineering, 2007, 32(2C): 89-99.

[6] Olyaee S, Dehghani A A. High resolution and wide dynamic range pressure sensor based on two-dimensional photonic crystal. Photonic Sensors, 2012, 2(1): 92-96.

[7] Olyaee S, Naraghi A, Ahmadi V. High sensitivity evanescent-field gas sensor based on modified photonic crystal fiber for gas condensate and air pollution monitoring. Optik, 2014, 125(1): 596-600.

[8] Xu Z, Cao L, Su P, He Q, Jin G, Gu G. Micro-displacement sensor with large dynamic range based on photonic crystal co-directional coupler. IEEE Journal of Quantum Electronics, 2007, 43(2): 182-187.

[9] Haus H A. Wave and fields in optoelectronics (Prentice-Hall Series in Sold State Physical Electronics), 1985, Englewood Cliffs, USA: Prentice Hall, 258-273.

[10] Joannopoulos J D, Johnson S G, Winn J N, Meade R D. Photonic Crystals Molding the Flow of Light, 2007, Princeton: Princeton University Press

[11] Buswell S C, Wright V A, Buriak J M, Van V, Evoy S. Specific detection of proteins using photonic crystal waveguides. Optics Express, 2008, 16(20): 15949-15957.

[12] Bougrioua F, Boumazab T, Bouchemat M. Design of photonic crystals waveguide using microfluidic infiltration. Applied Mechanics and Materials, 2014, 492, 301-305.