Author:
Dash Diptimayee,Saini Jasmine,Goyal Amit Kumar,Massoud Yehia
Abstract
AbstractIn this manuscript, a novel photonic crystal resonator (PhCR) structure having an exponentially graded refractive index profile is proposed to regulate and alter the dispersion characteristics for the first time. The structure comprises silicon material, where porosity is deliberately introduced to modulate the refractive index profile locally. The structural parameters are optimized to have a resonant wavelength of 1550 nm. Further, the impact of various parameters like incidence angle, defect layer thickness, and analyte infiltration on device performance is evaluated. Finally, the sensing capability of the proposed structure is compared with the conventional step index-based devices. The proposed structure exhibits an average sensitivity of 54.16 nm/RIU and 500.12 nm/RIU for step index and exponentially graded index structures. This exhibits the generation of a lower energy resonating mode having 825% higher sensitivity than conventional resonator structures. Moreover, the graded index structures show a 45% higher field confinement than the conventional PhCR structure.
Publisher
Springer Science and Business Media LLC
Reference41 articles.
1. Hlubina, P. High performance liquid analyte sensing based on Bloch surface wave resonances in the spectral domain. Opt. Laser Technol. 145, 107492 (2022).
2. Goyal, A. K., Kumar, A. & Massoud, Y. Thermal stability analysis of surface wave assisted bio-photonic sensor. Photonics 9, 324 (2022).
3. Joannopoulos, J. D., Johnson, S. G., Winn, J. N. & Meade, R. D. Photonic Crystals: Molding the Flow of Light 2nd edn. (Princeton University Press, 2008).
4. Goyal, A. K., Dutta, H. S. & Pal, S. Recent advances and progress in photonic crystal based gas sensors. J. Phys. D Appl. Phys. 50(20), 203001 (2017).
5. Ahmed, A. M. & Mehaney, A. Ultra-high sensitive 1D porous silicon photonic crystal sensor based on the coupling of Tamm/Fano resonances in the mid-infrared region. Sci. Rep. 9(1), 6973 (2019).
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