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. 2025 Mar 7;15(1):7935.
doi: 10.1038/s41598-025-91050-8.

Photonic crystal with a defect layer of silicon containing polymer nanocomposites as radiation detector

Zaky A Zaky  1   2   3 , V D Zhaketov  4   5 , S V Kozhevnikov  4 , Mohammed Sallah  6
Affiliations

Photonic crystal with a defect layer of silicon containing polymer nanocomposites as radiation detector

Zaky A Zaky et al. Sci Rep. .

Abstract

This paper presents a photonic crystal-based gamma radiation detector featuring a defect layer of silicon embedded with polymer nanocomposites. The transfer matrix method is utilized as a computational tool to evaluate the transmittance properties of the proposed detector. The study investigates the effects of cell count and porosity on the detector's performance. The model can accurately and simultaneously distinguish between different gamma radiation doses by observing changes in the refractive index of the active layer. The detector demonstrates high sensitivity, with 0.804 nm/Gy for doses ranging from 0 to 100 Gy and 0.225 nm/Gy for doses between 100 and 200 Gy. The proposed model, incorporating porous silicon and ethylene oxide polymer nanocomposites, exhibits exceptional performance as a gamma radiation sensor.

Keywords: Gamma radiation; Photonic crystal; Polymer nanocomposite; Porous silicon.

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Conflict of interest statement

Declarations. Competing interests: The authors declare no competing interests. Ethics declarations: This article does not contain any studies involving animals or human participants performed by any authors.

Figures

Fig. 1
Fig. 1
Geometrical structure of PhC with defect layer of PSi containing PNC of ethylene oxide.
Fig. 2
Fig. 2
(A) Experimental and fitted RIs of PNC of ethylene oxide, and (B) RIs of PSi doped with PNC of ethylene oxide at different doses.
Fig. 3
Fig. 3
Transmittance of the 1DPhC, (A) without defect PSi layer (black line) and with defect PSi layer (red line) at 0 Gy, and (B) with defect PSi layer at 0 Gy, 100 Gy, and 200 Gy.
Fig. 4
Fig. 4
Transmittance of the prominent peak of the defected-PhC with PSi containing PNC of ethylene oxide as formula image at 0 Gy for different numbers of cells (formula image, formula image, and formula image).
Fig. 5
Fig. 5
(A) T/FWHM at 0 Gy, (B) S/FoM, and (C) Q/LoD of the defected-PhC with PSi containing PNC of ethylene oxide as formula image (formula image, formula image, and formula image).
Fig. 6
Fig. 6
Transmittance of the prominent peaks of the defected-PhC with PSi containing PNC of ethylene oxide as formula image at 0 Gy, 100 Gy, and 200 Gy at different porosities of (A) 10%, (B) 20%, (C) 30%, and (D) 36%, (formula image, formula image, and formula image).
Fig. 7
Fig. 7
(A) T / FWHM at 0 Gy, (B) S / FoM, and (C) Q / LoD of the defected-PhC with PSi containing PNC of ethylene oxide as formula image (formula image, formula image, and formula image).
See this image and copyright information in PMC

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