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We present a fully integrated mid-infrared sensor. The laser and detector are fabricated from a bi-functional quantum cascade structure, connected through a dielectric-loaded surface plasmon waveguide, which acts as interaction zone and provides high coupling.
A metal/dielectric multilayered metasurface can be used to engineer the plasma frequency by controlling the ratio between the metal and dielectric layers. In this work, we demonstrate that a multilayered nanodisk metasurface based on semiconductor materials offers the design flexibility for tuning the plasmonic resonance.
We study a metamaterial-based optical waveguide formed by a silica-filled slot in a layered metal-dielectric slab. This geometry results in very strong confinement of a quasi-TE fundamental mode and gives smaller propagation losses than a purely metallic slot waveguide.
We report on linear and nonlinear infrared and plasmonic properties of chalcogenide crystal of the Bi-Sb-Te-Se family that was recently identified as a prospective platform for switchable broadband plasmonic devices.
We experimentally demonstrate a dielectric metamaterial comprising silicon nanofins on a glass substrate. Left- and right-circularly polarized beams incident upon the device are deflected into different directions. Our approach avoids the efficiency issues of plasmonics.
We probe porous metal-organic framework materials (MOFs) using broadband terahertz (THz) pulses. Water molecules that are absorbed by the pores of the material display intermolecular dynamics differing from those of free water.
We report on the electromagnetic properties of the single-cycle “flying doughnut” electromagnetic permutations in the context of their interactions with nanoscale objects, such as dielectric and plasmonic nanoparticles.
By three-dimensional imaging and measurements of energy density flux, we experimentally demonstrate that light bullets generated by filamentation in bulk dielectric media with anomalous group velocity dispersion are spatio-temporal, polychromatic Bessel pulses.
Excitons are studied experimentally and theoretically in atomically thin WS2 layers. We find a binding energy of 0.32eV as well as non-hydrogenic behavior of the exciton states due to the non-uniformity of the dielectric environment.
We investigate resonant enhancement of light in transition metamaterialsunder the local and nonlocal response function approximations, and analyze the influence of nonlocality on the field distribution in the near-zero region.
Electromagnetic Zenneck THz surface waves propagating on a bow-tie antenna are employed for time-resolved near-field imaging of subwavelength-size SrTiO3 and TiO2 particles. This approach provides high contrast, high-spatial resolution imaging through enhancing the fieldparticle interaction.
We measure the transmission of terahertz pulses through an intrinsic silicon waveguide, and observe a decrease in absorption at higher terahertz fields. The effect is enhanced when photocarriers are introduced by top-illuminating the waveguide.
Dielectric metamaterial layers are lossless, and exhibit relatively high transmission efficiencies (contrary to plasmonic metasurfaces). Subwavelength dielectric lenses have been developed - demonstrating beam area contraction ratio of three, and insertion losses of 11%.
We show that a structure of alternating dielectric layers with deep subwavelength thicknesses exhibits novel transmission effects that depend on the order of the layers and on nanometer scale variations of the layer widths.
We investigate scattering properties of parity-time-symmetric cylinders. We show that, the scattering pattern of such structures changes drastically by changing the angle of incidence. In addition PT-particles preferentially deflect light at a certain angle.
The complex band structure of HCG is solved with revised couple wave theory. Further, we analytically solved the field envelope for the HCG with finite length and investigate the impact on modes' Q factors.
We present a detailed investigation of third and fifth harmonics generation with 20 fs pulses at 2 µm in CaF2 crystal, revealing a negligible contribution of higher-order Kerr terms up to intensities of 15 TW/cm2.
We show that disorder in dielectric structures made of multiple layers of deep subwavelength thickness can induce extremely short-ranged localization. Additionally, the disorder can convert evanescent waves into bulk localized modes, enhancing transport dramatically (*10,000).
We report a broadband terahertz metamaterial absorber with two nested back-to-back split-ring resonators constituting a single planar resonator. Bandwidths of 0.66THz and 0.98THz with the absorptivity above 0.8 and 0.6 were experimentally obtained respectively.
Laser-induced damage thresholds (LIDT) in dielectric crystals were evaluated at different temperature. The temperature dependence of the LIDTs could be explained with some physical models.
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