We demonstrate a reusable and reconfigurable surface enhanced Raman scattering (SERS) platform by optically trapping Ag nanoparticles with a photonic crystal cavity integrated with a microfluidic chip. High-performance SERS is performed in a very reproducible manner, owing to the fact that Ag aggregates are produced by optical trapping in a controllable process that is monitored in real-time by...

Optical trapping is a widely used technique, with many important applications in biology and metrology. Complete modelling of trapping requires calculation of optical forces, primarily a scattering problem, and nonoptical forces. The T-matrix method is used to calculate forces acting on spheroidal and cylindrical particles. Preprint of: T. A. Nieminen, H. Rubinsztein-Dunlop, N. R. Heckenberg an...

"Rainbow trapping" has been proposed as a scheme for localized storage of broadband electromagnetic radiation in metamaterials and plasmonic heterostructures. Here, we articulate the dispersion and power flow characteristics of rainbow trapping structures, and show that tapered waveguide structures composed of dielectric core and metal cladding are best suited for light trapping. A metal-insula...

Enzyme-catalyzed signal amplification was introduced to the electrochemical detection of the OH radical. In the presence of phenol as a trapping agent, glucose as a substrate, and pyrroloquinoline quinone-containing glucose dehydrogenase (PQQ-GDH) as a catalyst, the current signal for the trapping adducts (catechol and hydroquinone) produced by the hydroxylation of phenol could be amplified an...

Related Articles Nanophotonic light trapping in solar cells App. Phys. Rev. 2012, 11 (2012) Minimizing reflection losses from metallic electrodes and enhancing photovoltaic performance using the Simicrograting solar cell with vertical sidewall electrodes Appl. Phys. Lett. 101, 103902 (2012) Comparison of periodic light-trapping structures in thin crystalline silicon solar cells J. Appl. Phys. 1...

Two nematode trapping fungi were isolated from aerated soil samples collected fron Anand district( Gujarat) India and identified on the basis of their culture –morphological characteristics and 18S rRNA gene sequencing as Arthrobotrys oligospora and Duddingtonia flagrans . These fungal isolates were assessed for their trapping efficiency further. Trapping structures such as ring like structures...

Human multidrug resistance protein 1 (MRP1) is a membrane ATP-binding cassette transporter that confers multidrug resistance to tumor cells by effluxing intracellular drugs in an ATP-dependent manner. The mechanisms by which transport occurs and by which ATP hydrolysis is coupled to drug transport are not fully elucidated. In particular, the function of the signature sequences in the nucleotide...

2014 The possibility of trapping ions from an externally injected pulsed ion beam in a radio-frequency quadrupole ion trap, with phase-synchronized switching-on of the driving field, was investigated. Phase space methods were used to derive the optimum conditions for permanently trapping the injected ions. A high trapping efficiency, close to unity, is possible and energy-selectivity as well as...

The transients of fast free-carrier recombination and of multi-trapping processes due to different species of defects have been investigated by photoluminescence and by contact and microwave photoconductivity. Three distinct stages of relaxation, namely, of stimulated emission, of recombination due to point defects and capture into trapping centers associated with dislocations, and a non-expone...

We present a modal theory of self-trapping spatially incoherent light beams in any general nonlinear media. We find that a self-trapped incoherent beam induces a multimode waveguide which guides the beam itself by multiply populating the guided modes. The self-trapping process alters the statistics of the incoherent beam, rendering it localized. We find the conditions for self-trapping (“existe...