Abstract
An electromagnetically induced transparency (EIT) analog in hybrid metal–dielectric metamaterials is proposed and numerically demonstrated in the terahertz region. The EIT analog consists of a metal bar and a silicon disk (SD) to support localized surface plasmon resonance and anapole modes. A high transmission EIT-like optical response was achieved with a Q-factor of ∼250 as interpreted by the destructive interference between these two modes through the hybrid metamaterial. The influences of the background index and SD radius on the hybrid metamaterial are also demonstrated. In addition, the proposed metamaterial has the potential to be integrated into microfluidic chips for tumor, pesticide, and poison sensing, which gives a new way to realize EIT in a way that is different using all-metal and all-dielectric materials.
Highlights
Induced transparency (EIT) refers to the formation of a narrow transparency window within a broad absorption spectrum and was originally observed in atomic physics.1–8 This arises due to quantum destructive interference in three energy levels between two different excitation pathways
We demonstrate that the metal bar (MB) supports a low-Q localized surface plasmon (LSP) resonance, and the silicon disk (SD) creates an anapole mode
Three kinds of arrays composed of the MB only, SD only, and hybrid metal–dielectric metamaterial are numerically analyzed, and the transmission spectra are shown in Figs. 2(a)–2(c), respectively
Summary
Induced transparency (EIT) refers to the formation of a narrow transparency window within a broad absorption spectrum and was originally observed in atomic physics. This arises due to quantum destructive interference in three energy levels between two different excitation pathways. Induced transparency (EIT) refers to the formation of a narrow transparency window within a broad absorption spectrum and was originally observed in atomic physics.. Induced transparency (EIT) refers to the formation of a narrow transparency window within a broad absorption spectrum and was originally observed in atomic physics.1–8 This arises due to quantum destructive interference in three energy levels between two different excitation pathways. An EIT analog has been proposed through the physics behind its phenomenon This principle leads to the realization of several classical optical systems, such as coupled microresonators, photonic crystal waveguides, a waveguide side-coupled to a resonator, and metamaterials, which are robust and free from the scathing experimental requirements of quantum optics.. We propose a hybrid EIT analog based on both metals and dielectrics to realize EIT with a Q-factor of ∼250. The proposed structure provides a new way to realize EIT-like transmission
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