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Abstract: We describe the fabrication and characterisation of arrays of metallic plasmon resonant nanorings, each of which are formed from two semicircles of different radius. We show that using a dual semicircle structure defined by electron beam lithography can result in closely spaced localized plasmon resonant peaks in the visible region, which cannot be achieved using a simpler nanoring structure with one radius. The advantage of producing two closely spaced resonant peaks is a structure that can be used for Raman sensing purposes at two different wavelengths. [Copyright &y& Elsevier]

Abstract: Heavily doped silicon dots arrays have been fabricated and measured to investigate their resonance characteristics in the terahertz range. Multiple plasmon resonances have been observed for arrays of dots with different dimensions. The observed phenomenon provides evidence of the existence of bulk plasmon resonance of heavily doped silicon dots arrays at terahertz frequencies, and will have applications in the design of quasi-optical components. [Copyright &y& Elsevier]

Previous research into the use of Flame Hydrolysis Deposition (FHD) of glasses in integrated optics has focused on the successful commercial exploitation of low cost optical devices within the field of telecommunications and optoelectronics. Recently we have sought to apply these fabrication technologies to the development of optical biochips, utilising their ability to be integrated with microfluidics as a ‘Lab-on-a-chip’ platform. In this paper, we carry this development forward by seeking to create a microarray of integrated optical sensing elements, addressed using a glass-polymer hybrid technology in which poly(dimethylsiloxane), PDMS, is used as an elastomeric packaging over-layer. In particular, we describe the wide range of modelling and microfabrication processes required for the successful manufacture, integration and packaging of such arrays. The integration of both optical and fluidic circuits in this device avoids precise alignment requirements and results in a compact, robust and reliable device. Finally, in this paper, we describe the implementation of a pumping system for delivering small amounts of fluid across the array together with an optical signal treatment. [Copyright &y& Elsevier]