Experimental study of heat transfer in micro glass tubes mediated by surface phonon polaritons

Abstract

We report a temperature measurement of the surface of micro structured glass tube, affected by surface phonon polaritons' (SPPs) energy enhancement. The glass tubes were designed to guide monochromatic thermal energy to improve heat conduction or serve as radiative source. The simulation results show strong enhancement of the Free Path when a wave guide radius is between 2.0 and 10 μm. Absorption of enhanced SPPs energy on the waveguide areas with high absorptivity has some possibility to cause local rise in temperature. Various shapes of micro glass tubes are simply fabricated, and heated by using a Pt wire in a vacuum chamber. Surface temperatures of glass tubes are measured by infrared digital thermo microscope as well as by using a micro-thermocouple to investigate the temperature distribution on both tapered and thin micro glass tubes. © Published under licence by IOP Publishing Ltd.