The ability to detect molecules at low concentrations is highly desired for applications that range from basic science to healthcare. Considerable interest also exists for ultrathin materials with high optical absorption, e.g. for microbolometers and thermal emitters. Metal nanostructures present opportunities to achieve both purposes. Metal nanoparticles… (More)
– In this paper 1 , we propose a highly scalable packet switch that is based on a multi-stage multi-layer architecture made up of many modest size switches. This new architecture resembles the famous Clos-network studied in circuit switching systems except that it has distributed shared memories in the central stage. We call it Central-stage Buffered… (More)
Metallic structures with nanogap features have proven highly effective as building blocks for plasmonic systems, as they can provide a wide tuning range of operating frequencies and large near-field enhancements. Recent work has shown that quantum mechanical effects such as electron tunnelling and nonlocal screening become important as the gap distances… (More)
Endogenous retroviruses (ERVs) are important retroelements that reside in host genomes. However, ERV expression patterns and regulatory mechanisms are poorly understood. In this study, chicken embryo fibroblasts (CEFs) and MSB1 cells infected with Marek’s disease virus (MDV) exhibited significantly increased expression of env from the endogenous retrovirus… (More)
We lithographically fabricate arrays of optical antennas with ∼6nm gaps. The enhancement factor from surface-enhanced Raman scattering measurement is ∼5 times larger than the same structure with ∼18nm gaps.
In this paper, a geomagnetic matching navigation method that utilizes the geomagnetic vector is developed, which can greatly improve the matching probability and positioning precision, even when the geomagnetic entropy information in the matching region is small or the geomagnetic contour line's variety is obscure. The vector iterative closest contour point… (More)
Endogenous retroviruses (ERVs) are genomic elements that are present in a wide range of vertebrates and have been implicated in a variety of human diseases, including cancer. However, the characteristic expression patterns of ERVs, particularly in virus-induced tumours, is not fully clear. DNA methylation was analysed by bisulfite pyrosequencing, and gene… (More)
With vibrant colours and simple, room-temperature processing methods, electrochromic polymers have attracted attention as active materials for flexible, low-power-consuming devices. However, slow switching speeds in devices realized to date, as well as the complexity of having to combine several distinct polymers to achieve a full-colour gamut, have limited… (More)
We fabricate plasmonic dimers consisting of two metallic nanostructures spaced by a few angstroms using lithographic methods, and show that quantum mechanical tunneling across the gaps limits the enhancement in surface-enhanced Raman scattering.