Refractive Index Sensor Mim Based Waveguide Coupled With a Slotted Side Resonator

Abstract

In this paper, a plasmonic sensor based on a metal-insulator-metal (MIM) waveguide with a slotted side-coupled racetrack cavity is proposed. The transmission characteristics of the cavity are analyzed theoretically, and the improvements of performance for the racetrack cavity structure compared to a single disk cavity are studied. The influence of structural parameters on the transmission spectra and sensing performances is investigated thoroughly. The achieved sensitivity for the first mode was S = 959 nm/RIU and S = 2380 nm/RIU for the second one. Its corresponding sensing resolution is 1.04 × 10 −5 RIU for mode 1 and 4.20 × 10 −6 RIU for mode 2, respectively, and high transmissions are achieved at the two resonant wavelengths of 898.8 nm and 1857.1 nm. The proposed plasmonic sensor is a good candidate for designing novel devices and applications, in the field of chemical and biological sensing, and also in the field of plasmonic filters, switches, etc.

Plasmonic Refractive Index Sensor and Plasmonic Bandpass Filter Including Waveguide and Four Teeth Based On Fano Resonances

“…[17]. In these structures, by merging the properties of integrated electronic (high miniaturization) and photonic (high speed), a unique device can be produced for the next generation, which will bring a very high processing speed [16,18]. Therefore, more and more scientists are emphasizing research on plasmonic materials and promoting the use of these materials in the production and development of new tools [19].…”

“…In addition, SPPs can be used to transfer data in high-density photonic integrated circuits [14]. Metal-Insulator-Metal (MIM) waveguide coupled resonators have unique properties such as overcome the diffraction limit [15], high wavelength propagation range, simplicity of construction [16] and high ability to confine light at the scale below the wavelength. [17].…”

Highly sensitive plasmonic temperature sensor based on Fano resonances in MIM waveguide coupled with defective oval resonator

“…Surface plasmons polaritons (SPPs) are electromagnetic waves that trap on metal-dielectric interface (MacDonald et al 2009; Barnes et al 2003; Barnes et al 2003) , which has the capability to overcome the typical diffraction limit and is regarded as an intriguing field optical manipulation (Zayats et al 2005), control, processing (Yin et al 2012;Zhou et al 2015;Ozbay 2006) , sensing (Liu et al 2010;Hocini et al 2021;Yan et al 2015;Achi et al 2020), and nano integrating (Barnes et al 2003).…”

“…In recent years, surface wave-based sensing techniques like Bloch surface wave (BSW) and surface plasmon (SPR) have been used in a variety of bio-sensing applications due to their inherent advantages, such as immune to electromagnetic interference, rapid response time, real-time and label-free detection. (Goyal and Saini 2020;Wang et al 2017;Bashiri et al 2019;Goyal and Pal 2020) Plasmonic sensing has been an important research field and has been widely used in detecting trace molecules in biology and chemistry (Liu et al 2010;Yan et al 2015;Achi et al 2020;Tong et al 2014) . To date, many plasmonic designs based on SPPs have been proposed to realize sensors with high performance of detection.…”

“…These devices are based on MIM waveguides and made up of waveguides coupled with resonators. Due to the good properties of light confinement (Wen et al 2014;Yu et al 2019) , wide available frequency range, the absence of bending loss and easy to manufacture, sensors based on MIM plasmonic waveguides have aroused a great interest (Achi et al 2020;Wang et al 2019;Hocini et al 2020;Ghorbani et al 2018) . furthermore, MIM waveguide coupled resonators can produce special optical effects, such as Fano resonance (Wen et al 2014;Piao et al 2011;Yu et al 2015) and in some cases, electromagnetically induced transparency (EIT) (Piao et al 2012).…”