Abstract
We demonstrate the realization of on-chip plasmonic analogue of electromagnetically induced transparency (EIT) in integrated plasmonic devices using detuned Fabry-Perot resonators aperture-side-coupled to a metal-insulator-metal (MIM) waveguide, with the transmission peak occurring at the intermediate wavelength. Strong MIM mode confinement along with localized side-coupling allows one to realize subwavelength photonic components with EIT-like transmission. Numerical results show that MIM components exhibiting pronounced EIT-like spectra in near infrared with the footprint of < 0.15 μm2 and group index of ~26 can be designed.
Highlights
The quantum phenomenon of electromagnetically induced transparency (EIT) has been a subject of intensive investigations in recent years due to the EIT-associated features of strong dispersion and slow-light propagation within the transparency window [1], promising a variety of potential applications, e.g. in nonlinear mixing and optical storage
We demonstrate the realization of on-chip plasmonic analogue of electromagnetically induced transparency (EIT) in integrated plasmonic devices using detuned Fabry-Perot resonators aperture-side-coupled to a metal-insulator-metal (MIM) waveguide, with the transmission peak occurring at the intermediate wavelength
Numerical results show that MIM components exhibiting pronounced EIT-like spectra in near infrared with the footprint of < 0.15 μm2 and group index of ~26 can be designed
Summary
The quantum phenomenon of electromagnetically induced transparency (EIT) has been a subject of intensive investigations in recent years due to the EIT-associated features of strong dispersion and slow-light propagation within the transparency (spectral) window [1], promising a variety of potential applications, e.g. in nonlinear mixing and optical storage. It should be noted that the phenomenon of EIT can be considered using two alternative ways: as resulting from the destructive interference between two pathways involving the bare, dipole-allowed and metastable, states or, equivalently, the doublet of dressed states (created by the strong pump radiation) representing two closely spaced resonances decaying to the same continuum [1,7] While these two physical pictures are equivalent when dealing with the EIT in atomic systems, their realization with classical systems, whose responses are determined by their configurations and not electromagnetically induced as in the EIT, depends on the EIT mechanism that is imitated [8]. The two detuned resonators were separated by an integer number of mode wavelengths because of the design constraints [3, 6], but such a separation is, in principle, not required for realization of EIT-like behavior
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