Journal
PHYSICA B-CONDENSED MATTER
Volume 607, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physb.2021.412854
Keywords
1D photonic crystal; Transfer matrix method; Transmission characteristics; Photonic band gap; Waterborne bacteria
Categories
Ask authors/readers for more resources
This study introduces symmetric and asymmetric 1D defective photonic crystal structures for real-time detection of waterborne bacteria, with a focus on MgF2 and PbS materials. The transfer matrix method is used to analyze the optical properties, and the effects of structural parameters on sensor performance are thoroughly investigated. An asymmetric structure achieved optimal sensitivity and resolution for potential application in biophotonics.
We have proposed both symmetric and asymmetric configurations of 1D defective photonic crystal structures, which are designed with an alternate arrangement of MgF2 and PbS for real-time detection of waterborne bacteria such as Escherichia coli, vibrio cholera and shigella flexneri. The transfer matrix method is employed to assay the transmittance and absorption spectrum of the said structures. A substantial shift in position of the resonant peak is noticed, when the defect layer is infiltrated with contaminated water containing different bacteria. The effects of variation in the defect layer thicknesses, angles of incidence and period of the dielectric layer on the sensor performance are thoroughly addressed. An optimum sensitivity of 387.5 nm/RIU, SNR of 79.2, FOM of 1174.24RIU-1, DL of 2.44?10-4RIU and resolution of 0.0881 nm is achieved for asymmetric structure. The aforementioned upshots could open up an avenue for realization of effectual and real-time waterborne bacteria sensor for biophotonics applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available