Double Electromagnetically Induced Transparency and Its Slow Light Application Based on a Guided-Mode Resonance Grating Cascade Structure

Abstract

In recent years, the achievement of the electromagnetically induced transparency (EIT) effect based on the guided-mode resonance (GMR) effect has attracted extensive attention. However, few works have achieved a double EIT-like effect using this method. In this paper, we numerically achieve a double EIT-like effect in a GMR system with a three-layer silicon nitride waveguide grating structure (WGS), using the multi-level atomic system model for theoretical explanation. In terms of slow light performance, the corresponding two delay times reach 22.59 ps and 8.43 ps, respectively. We also investigate the influence of wavelength detuning of different GMR modes on the transparent window and slow light performance. Furthermore, a wide-band flat-top transparent window was also achieved by appropriately adjusting the wavelength detuning between GMR modes. These results indicate that the EIT-like effect in the WGS has potential application prospects in low-loss slow optical devices, optical sensing, and optical communications.

Exploring the influence of nanocavity alignment on slow light generation via multiple EIT and Fano resonances in square lattice plasmonic silver nanostructures

“…The coupling of the electromagnetic field with metal nanoparticles, leading to the generation of surface plasmons, has garnered significant attention in recent years due to its potential applications in sensors [1][2][3][4], biomedicine [5], cancer therapy [6], energy harvesting [7,8], Salisbury screen [9] and slow light devices [10][11][12]. Notably, slow light, which is based on the phenomenon of electromagnetic-induced transparency (EIT), holds great promise for practical applications in fields such as optical communications [13][14][15], optical computing [16,17], and photonic integrated circuits [18][19][20][21].…”

Multi-Band Analogue Electromagnetically Induced Transparency in DoubleTuned Metamaterials

“…The study of A-EIT has been widely spread. Among them, the A-EIT effect of the metamaterials has been widely concerned in the microwave [12], visible [13], terahertz [14] and infrared bands [15].…”