Plasmonic slow light waveguide with hyperbolic metamaterials claddings

Abstract

Plasmonic waveguides with an insulator core sandwiched between hyperbolic metamaterials (HMMs) claddings, i.e. HIH waveguide, are investigated for achieving wide slow-light band with adjustable working wavelength. The transfer matrix method and the finite-difference-time-domain simulation are employed to study waveguide dispersion characteristics and pulse propagation. By selecting proper silver filling ratios for HMMs, the hetero-HIH waveguide presents a slow-light band with a zero group velocity dispersion wavelength of 1.55 μm and is capable of buffering pulses with pulse width as short as ∼20 fs. This type of waveguides might be applicable for ultrafast slow-light application.

Existence Conditions of High‐k Modes in Finite Hyperbolic Metamaterials

“…Naturally hyperbolic material and multilayer HMMs are recently studied as alternative configurations of plasmonic waveguides, looking for confined waves to the interfaces. Seeking for a general scheme, the present work investigates all kinds of possible bulk high‐k waves in the HMM core; those propagating in the HMM slab over a long length and the ones more confined to the interface of HMM and surroundings.…”

Investigation of effective media applicability for ultrathin multilayer structures

“…This may prove of utmost importance for designing HMM-based devices since their characteristics may differ significantly from the ones calculated using the EMA theory. Most of the applications of HMMs in waveguiding [33][34][35] , refractive index sensing 11 , optical cavity design 36 , hyperlens for sub-diffraction imaging 37 and so on are based on EMA. Therefore, it is important to know its range of applicability in order to design the needed devices.…”

Optics with hyperbolic materials [Invited]

“…6(c)]. As shown in [76] such waveguides support slow light modes with group velocity up to 10 times slower than speed of light in vacuum.…”

“…(b) Multilayer HMM cladding[31,75]. (c) Vertical multilayer HMM cladding[76]. (d) Optical cavities made of two to four periods of Ag/Ge multilayer HMMs[60].…”