0030-4018/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.optcom.2009.05.033 * Corresponding author. E-mail address: [email protected] (Z. Zhen We report a novel design of photonic crystal fiber (PCF) with a rectangular array of four closely-spaced, highly elliptical air holes in the core region and a circular-air-hole cladding. The proposed PCF is able to support ultra-wideband sing...

PURPOSE We present the regenerative label-free fiber optical biosensor that exploits surface plasmon resonance for quantitative detection of fibrinogen (Fbg) extracted from human blood plasma. MATERIALS AND METHODS The sensor head was made up of a multimode optical fiber with its polymer cladding replaced by metal composite of nanometer thickness made of silver, aluminum, and nickel. The Ni l...

The temperature of zirconium alloy cladding on the postulated spent nuclear fuel pool complete loss coolant accident is abruptly increased at a certain time and almost fully oxidized to weak ZrO2 in air. This abrupt escalation phenomenon induced by air-oxidation breakaway called fire. Although an kinetic model correlated between has been implemented MELCOR code, it likely bring about unexpected...

Inner-side coatings have been proposed as a complementary solution within the accident tolerant fuel (ATF) framework, to provide enhanced protection for nuclear cladding. Unlike external surface, degradation of irradiated internal cladding surface has not studied extensively. Fission fragments produced during fission is one key players in this degradation. This study aimed estimate minimum thic...

A new scheme is proposed to measure the electro-optical (EO) and converse-piezoelectric (CPE) coefficients of the PMN-PT ceramics simultaneously, in which the PMN-PT ceramics acts as the guiding layer of a symmetrical metal-cladding waveguide. As the applied electric field exerts on the waveguide, the effective refractive index (RI) (or synchronous angle) can be effectively tuned from a selecte...

We use coupled mode theory, adequately incorporating optical losses, to model ultra-broadband terahertz (THz) waveguide emitters (0.1-20 THz) based on difference frequency generation of femtosecond infrared (IR) optical pulses. We apply the model to a generic, symmetric, five-layer, metal/cladding/core waveguide structure using transfer matrix theory. We provide a design strategy for an efficie...

Cladding base metals with platinum or platinum alloys offers certain technical and economic advantages. In an earlier paper the mechanical properties of the metals to be joined were discussed. In this second paper it is shown that interdifi ion of the two materials being joined together must be considered, and that ifthe partners have different diffusion coefficients diffzculties can result dur...

A large-mode-area polymer photonic crystal fiber made of polymethyl methacrylate with the cladding having only one layer of air holes near the edge of the fiber is designed and proposed to be used in surface plasmon resonance sensors. In such sensor, a nanoscale metal film and analyte can be deposited on the outer side of the fiber instead of coating or filling in the holes of the conventional ...

We optimize the threshold gain for cylindrical composite (semiconductor-dielectric-metal) waveguides (WGs) with various metal claddings. We show that the optimal dielectric width is invariant with respect to the imaginary part of the permittivity of the metal, εM'', and weakly dependent on the real part, εM'. To explain this behavior, we compare optimal geometries of WGs with different semicond...

We present all-optical tuning and switching of a microcavity inside a two-dimensional photonic crystal waveguide. The photonic crystal structure is fabricated in silicon-on-insulator using complementary metal-oxide semiconductor processing techniques based on deep ultraviolet lithography and is completely buried in a silicon dioxide cladding that provides protection from the environment. By foc...