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We present a truxene-based distributed feedback laser sensor and demonstrate its sensing capabilities. Results for bulk refractive index sensing, detection of nano-layer adsorption at the laser surface and specific biomolecule sensing are shown.
We report on a nearly 8-fold increase in multi-hole defect photonic crystal biosensor response by incorporating insitu synthesis of DNA probes, as compared to the conventional functionalization method employing pre-synthesized DNA probe immobilization.
We propose a new type of CMOS-compatible polarization splitting antenna based on the dielectric-coated metal surfaces milled with a sub-wavelength aperture surrounded by asymmetric polarization-dependent indentations.
We have proposed and experimentally demonstrated a scheme for highly efficient excitation of surface plasmon using a structure consisting of an aperture in metal with a thin dielectric film at one side of the aperture.
Detectors that take full advantage of the energy confinement offered by surface waves could have significant performance advantages in dark current and optical functionality. We use a subwavelength patterned metal nanoantenna structure to convert incoming plane waves to these surface waves.
We report on the experimental demonstration of mode splitting in a rolled-up semiconductor microtube at telecom wavelengths. Surface scattering causes the splitting of degenerate clockwise and counter-clockwise whispering-gallery modes in the microtube.
We demonstrate thermo-optomechanical oscillators based on high-Q spherical ZBLAN microcavities and characterize their oscillatory behavior both theoretically and experimentally. We discuss the relevance of the outcomes for sensing applications.
Artificial media (metamaterials) have recently emerged as a candidate for engineering light-matter interaction at the nanoscale due to their potential for unconventional electromagnetic responses not found in resonant microcavities or photonic crystals. In spite of the detrimental effects of absorption losses, a few applications such as broadband single photon sources can be efficiently realized using...
We report the observation of an optical topological transition in the iso-frequency surface of a non-magnetic anisotropic metamaterial. Enhancement in the photon density of states is demonstrated as a result of this transition.
Single-wall carbon nanotube deposition on gold-coated plasmonic optical fiber sensors has been proposed and demonstrated. The effects of carbon nanotubes on the polarization-dependent coupling of light from the fiber to the coating and on the resulting refractometric sensor properties are experimentally investigated.
We investigated surface plasmon resonance in super-period metal nano-gratings and demonstrated a surface plasmon resonance spectrometer sensor with a fabricated super-period metal nanoslit grating.
We demonstrate a novel semiconductor-less photovoltaic device and investigate the plasmonic effects on this device structure. The device is made of metal and dielectric layers and the operation is based on hot carrier collection. We present the use of surface plasmons to improve energy conversion efficiency. The field localization provided by surface plasmons confine the incident light in the metal...
In this paper, design based on tapered circular grating structure was studied, to provide broadband enhancement in thin film amorphous silicon solar cells. In comparison to planar structure an absorption enhancement of ∼ 7% was realized.
Properties of silver metal nanoridge surface plasmon waveguide modes are investigated. It is found that semicircular top geometry nanoridges are optimal for supporting long range and high figure-of-merit surface plasmon modes.
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