Discernibly Temperature-insensitive Pressure Sensitivity in Porous Random-Hole Optical Fibers

Abstract

Novel breakthrough random-hole optical fibers (RHOFs) are fabricated in a draw tower facility, by tapering an optical fiber preform packed with a silica powder mixture capable of producing air holes in situ at the high temperature of tens of hundreds in degrees Celsius. Structural and propagation characteristics of the porous RHOF are explained briefly. Experimental investigations of the invented RHOF are performed for pressure sensor applications. Remarkable results are obtained for the RHOF with desirable pressure sensitivity independent of temperature, as is required for harsh conditions as in oil reservoirs.

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.…”