Microscale heat transfer and thermal extinction of a wire-grid polarizer.

ABSTRACT: We explore heat transfer and thermal characteristics of a wire-grid polarizer (WGP) on a microscale by investigating the effect of various geometrical parameters such as wire-grid period, height, and a fill factor. The thermal properties arise from heat transfer by light absorption and conduction in wire-grids. Fill factor was found to be the most dominant geometrical parameter. For TM polarized light, a higher fill factor with thicker wire-grids increased the temperature. The local temperature was found to rise up to Tmax?=?354.5?K. TE polarization tended to produce lower temperature. Thermal extinction due to polarimetric extinction by a WGP was also evaluated and highest extinction was observed to be 4.78?dB, which represents a temperature difference ?T?=?54.3?°C. We expect the results to be useful for WGPs in polarization-sensitive thermal switching applications.

SUBMITTER: Im S 

PROVIDER: S-EPMC6175867 | biostudies-other | 2018 Oct

REPOSITORIES: biostudies-other