Electrically tuned fractional-order temporal differentiator in silicon photonics

Ahmadpour, Afshin; Habibzadeh-Sharif, Amir; Bahrami-Chenaghlou, Faezeh

doi:10.1016/j.photonics.2021.100969

Cited by 8 publications

(1 citation statement)

References 28 publications

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“…To date, various devices have been proposed to implement optical sensors, which are mainly based on the Mach-Zehnder interferometer [13], surface plasmons [6,7,[13][14][15], Bragg gratings [16,17], photonic crystals [18], and whispering gallery mode (WGM) resonators [19]. WGM resonators can be constructed in various configurations, such as microring, microdisk, microsphere, and microtoroid resonators [14,[20][21][22][23][24][25][26]. It has been proven that these configurations are well-qualified candidates to realize the optical refractive index sensors because of their high quality-factor, high sensitivity, small footprint, high response speed, low limit of detection (LoD), and simplicity of integration [27].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of Si photonic NaCl sensors based on suspended microdisk resonators

Moeinimaleki,

Habibzadeh-Sharif,

Ahmadpour

et al. 2024

Phys. Scr.

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In this paper, two optical refractive index sensors, respectively based on a suspended microdisk resonator (SMDR) and a sub-wavelength Bragg grating suspended microdisk resonator (SWG-SMDR) have been designed on a silicon on insulator (SOI) platform, and their optical and sensing performances have been analyzed using the three-dimensional finite-difference time-domain method. It has been shown that the Bragg grating increases the optical confinement factor in the sensing region and, consequently, improves the light-matter interaction and sensitivity. Considering concentrations of 0 to 25% for the NaCl dissolved in the deionized water, the enhanced sensitivity and FOM of the SWG-SMDR sensor with the miniaturized optimal geometrical dimensions are 163.77 nm/RIU and 10.81 RIU-1, respectively. This compact optical sensor enhances the sensitivity and FOM by combining effects of the Bragg grating and suspension configuration in improving the light-matter interaction.

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