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Design and FDTD simulation of photonic crystal based sensor for biosensing applications
Author(s): Sello Manoto; Chemist Mabena; Rudzani Malabi; Saturnin Ombinda-Lemboumba; Patience Mthunzi-Kufa
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Paper Abstract

Photonic crystals (PhCs) is a unique and flexible class of optical devices that are able to manipulate the electromagnetic fields of light. PhCs is a subwavelength grating structure with a periodic arrangement of a high refractive index layer coated on a low refractive index material and can provide a strong light confinement depending on the size, periodicity and the refractive index. Finite difference time domain (FDTD) method can be used to simulate the electromagnetic properties of light through complex structures such as PhCs, because of the precision of the method in the description of geometry and properties of the material. In this study, FDTD software from Lumerical was used to design and simulate the electromagnetic properties of the PhCs based sensor for biosensing applications. The transmission, reflection and absorption characteristics through the proposed PhCs structure was analysed using a visible wavelength range of 400- 700 nm. The boundary conditions were correctly chosen and consisted of periodic boundary conditions and perfectly matched layers. The results revealed that the transmission and reflectance were dependent on the period of the PhCs and the enhanced electric field was confined in an area allowing for interaction with biological analytes.

Paper Details

Date Published: 7 March 2019
PDF: 8 pages
Proc. SPIE 10895, Frontiers in Biological Detection: From Nanosensors to Systems XI, 1089510 (7 March 2019); doi: 10.1117/12.2509855
Show Author Affiliations
Sello Manoto, CSIR National Laser Ctr. (South Africa)
Chemist Mabena, CSIR National Laser Ctr. (South Africa)
Univ. of the Witwatersrand (South Africa)
Rudzani Malabi, CSIR National Laser Ctr. (South Africa)
Univ. of South Africa (South Africa)
Saturnin Ombinda-Lemboumba, CSIR National Laser Ctr. (South Africa)
Patience Mthunzi-Kufa, CSIR National Laser Ctr. (South Africa)
Univ. of South Africa (South Africa)


Published in SPIE Proceedings Vol. 10895:
Frontiers in Biological Detection: From Nanosensors to Systems XI
Amos Danielli; Benjamin L. Miller; Sharon M. Weiss, Editor(s)

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