Study on sensing property of one-dimensional ring mirror-defect photonic crystal

Abstract

Based on the photon localization and the photonic bandgap characteristics of photonic crystals (PCs), one-dimensional (1D) ring mirror-defect photonic crystal structure is proposed. Due to the introduction of mirror structure, a defect cavity is formed in the center of the photonic crystal, and then the resonant transmission peak can be obtained in the bandgap of transmission spectrum. The transfer matrix method is used to establish the relationship model between the resonant transmission peak and the structure parameters of the photonic crystals. Using the rectangular air gate photonic crystal structure, the dynamic monitoring of the detected gas sample parameters can be achieved from the shift of the resonant transmission peak. The simulation results show that the Q-value can attain to 1739.48 and the sensitivity can attain to 1642 nm ⋅ RIU[Formula: see text], which demonstrates the effectiveness of the sensing structure. The structure can provide certain theoretical reference for air pollution monitoring and gas component analysis.

Study on a one-dimensional defective photonic crystal suitable for organic compound sensing applications

“…To evaluate whether the performance of the proposed sensor was capable of sensing minute refractive index changes due to changes in the OC samples infiltrated into the cavity region, we calculated the sensitivity ( S ), quality factor (QF) and figure of merit (FOM) of the proposed design under the influence of various OCs with respect to water. 42–45 …”

“…To evaluate whether the performance of the proposed sensor was capable of sensing minute refractive index changes due to changes in the OC samples inltrated into the cavity region, we calculated the sensitivity (S), quality factor (QF) and gure of merit (FOM) of the proposed design under the inuence of various OCs with respect to water. [42][43][44][45] The QF of any efficient photonic sensor must be as high as possible. A high QF value ensures a narrower full width at half maximum (FWHM) of the resonant peak inside the PBG, which is essential and desirable for any excellent photonic sensor for use in chemical and biomedical sensing applications.…”

“…The proposed simulations are based on the standard transfer matrix method (TTM), 42–45 which is one of the best computational techniques for simulating 1D periodic multilayer structures. The total transfer matrix T , which connects the amplitude of the electric and magnetic fields at the incident and exit ends, is described as: Here T 11 , T 12 , T 21 and T 22 are elements of the total transfer matrix representing the whole structure.…”

Refractive index EV sensor based on conventional and mirror image 1D defective photonic crystal designs: theoretical study

“…The proposed two biosensor designs consist of 1D defective PCs (AB) 4 C(AB) 4 and (AB) 4 CC(BA) 4 are composed of single and double defect layers respectively. The second design is known as ring mirror structure [34] consists of 1D defective planar PC having optical characteristics which are very similar to the optical characteristics of 1D APCs without defect based designs in which the propagation of electromagnetic waves is along the radial direction. In this section first we elaborate design of the 1D planar photonic crystal structure (AB) N composed of alternating layers A and B of materials silicon and polystyrene respectively as shown in Figure 1a.…”

“…Thus light microscopy process could not able to resolve EVs [33]. The proposed designs are capable of measuring the shift in position of the defect mode inside PBGs which depending upon change of refractive index for various EV samples and also by comparing the observed data with the experimentally available standard data of EVs with the help of their refractive index values [33][34]. To the best of our knowledge, the1D defective PC based refractive index EV sensor has been used for the first time to detect the cell count in order to assess the nutrient balance human body..…”