LDL Cholesterol Testing Device using Serial Reflected Face-to-Face Mirror System

Abstract

A low density lipoprotein (LDL) cholesterol testing device, structured with serial reflected face-to-face mirror (SRM) allowing spectrophotometry measurements, is presented. The spectrophotometry has been employed to measure the amount of light that a sample absorbs, but it generally should have had path length longer than 10 mm to secure enough sensitivity. Such requirement of path length has often been problematic in implementing a thin type of lab on a disc (LOD). We developed the SRM system which was implemented in a detection chamber with 1.4mm thickness, providing path length longer than 10mm, and thus straightforwardly being applicable to LOD as thin as a compact disc. The experimental results show that the SRM system gives not only a much thinner design compared to the conventional spectrophotometry-based LOD but also a comparable performance to already commercialized spectrometers.

Directional Radiation of Surface Plasmon Polaritons at Visible Wavelengths through a Nanohole Dimer Optical Antenna Milled in a Gold Film

“…Nanoantennas can be used in sensors and photodetectors [4,5], for enhancing the efficiency of light emission [6,7], and in optical near-field microscopy. In recent years various kinds of nanoantennas, such as bowtie nanoantennas [8][9][10][11], Hertzian dipole optical nanoantennas [12], and Yagi-Uda nanoantennas [13][14][15], have been widely studied.…”