Spoof surface plasmon polaritons based on-chip sensor for dielectric detection

Abstract

A compact millimeter-wave on-chip sensor for dielectric detection is presented using gallium arsenide technology based on spoof surface plasmon polaritons (SSPPs). The proposed structure is developed from traditional half-mode substrate integrated waveguide (HMSIW) and its dispersion characteristics is analyzed through electromagnetic simulations. Consequently, the operating frequency and bandwidth of the on-chip sensor can be easily adjusted, which provides more flexibility for the practical application of the sensor. The linear sensing for relative dielectric constant of the film materials is acquired, with thickness-insensitive property. Moreover, the low coupling to the nearby components can be achieved due to the strong field confinement characteristics of the SSPPs, which is of great significance in the application scenarios of on-chip integrated circuits for the suppression of electromagnetic interference.

Resonant excitation of terahertz surface magnetoplasmons by optical rectification over a rippled surface of n-type indium antimonide

“…Electromagnetic radiation with a frequency ranging from 0.3 to 10 × 10 12 Hz refers to terahertz (THz) gap (Shumyatsky & Alfano 2011). Recently, THz has attracted a lot of interest because its frequency application can be used in spectroscopy (Afsah-Hejri et al 2019;Spies et al 2020), communication (Yang et al 2020;Ghazialsharif et al 2023;Katyba et al 2023), imaging in medical diagnostics (Peng et al 2020;Zhang et al 2020;Wang 2021), sensing (Islam et al 2022;Lai et al 2023;Tan et al 2023), detection (Lewis 2019), etc. Terahertz radiation can be generated by a variety of techniques and processes, such as laser-plasma interaction Manendra et al 2020), electron beam-plasma interaction (Yang et al 2022;Gupta, Gurjar & Jain 2023), photoconductivity antenna (Isgandarov et al 2021;Lu et al 2022;Sandeep & Malik 2023), electron beam or laser interaction with a semiconductor or metal (Liu et al 2007;Davidson et al 2020;Dong et al 2021), nonlinear mixing of lasers (Kumar, Rajouria & KK 2013;Kumar et al 2017Kumar et al , 2023Srivastav & Panwar 2022), optical rectification (Lee et al 2000;Yeh et al 2007;Aoki, Savolainen & Havenith 2017) and second and third harmonic generation Gour et al 2022) etc.…”

“…2023; Tan et al. 2023), detection (Lewis 2019), etc. Terahertz radiation can be generated by a variety of techniques and processes, such as laser–plasma interaction (Malik & Singh 2020; Manendra et al.…”