Abstract
A wavelength band-pass filter with asymmetric dual circular ring resonators in a metal-insulator-metal (MIM) structure is proposed and numerically simulated. For the interaction of the local discrete state and the continuous spectrum caused by the side-coupled resonators and the baffle, respectively, the transmission spectrum exhibits a sharp and asymmetric profile. By adjusting the radius and material imbedded in one ring cavity, the off-to-on plasmon-induced absorption (PIA) optical response can be tunable achieved. In addition, the structure can be easily extended to other similar compact structures to realize the filtering task. Our structures have important potential applications for filters and sensors at visible and near-infrared regions.
Highlights
Surface plasmon polaritons (SPPs), a kind of transverse electromagnetic wave tightly confined at the interface between metal and dielectric material, is able to propagate up to a few micrometers [1,2].Their outstanding ability for overcoming the classical optical diffraction limit has made SPPs attractive as energy and information carriers in highly integrated optical circuits and devices [3,4].Among various SPP structures, insulator-metal-insulator (IMI) structures and metal-insulator-metal (MIM) structures are two important multilayer plasmonic structures
Plasmonic filters based on MIM waveguide structures, such as asymmetric nanodisk filter and sensor [17,18,19], side-coupled cavity sensor [20], notch resonator filter and sensor [21], and circular ring filter and sensor [22,23], are one of the most important optical devices, have attracted tremendous attention, and have been investigated widely in recent years
plasmon-induced absorption (PIA) response is investigated in a MIM-based end-coupled composite-slot-cavity resonator [31]
Summary
Surface plasmon polaritons (SPPs), a kind of transverse electromagnetic wave tightly confined at the interface between metal and dielectric material, is able to propagate up to a few micrometers [1,2]. Plasmonic filters based on MIM waveguide structures, such as asymmetric nanodisk filter and sensor [17,18,19], side-coupled cavity sensor [20], notch resonator filter and sensor [21], and circular ring filter and sensor [22,23], are one of the most important optical devices, have attracted tremendous attention, and have been investigated widely in recent years. PIA response is investigated in a MIM-based end-coupled composite-slot-cavity resonator [31] These MIM structures will be beneficial for optical switching in highly integrated photonic devices. The corresponding transmission spectra and the magnetic intensity distributions |Hz |2 at special wavelengths were investigated
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
