Title :
Narrow Bandwidth Midinfrared Waveguide Thermal Emitters
Author :
Wu, Yi-Ting ; Chang, Yi-Tsung ; Chen, Hung-Hsin ; Huang, Hao-Fu ; Tzuang, Dah-Ching ; Jiang, Yu-Wei ; Chang, Pei-En ; Lee, Si-Chen
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This work describes innovative waveguide thermal emitters with top metal perforated with subwavelength holes arranged in a short period to eliminate Bragg scattered waveguide modes (WMs) and surface plasmon polariton (SPP) modes. A metal-dielectric-metal parallel-plate waveguide with top metal perforated with subwavelength holes arranged in a short period exhibits high output intensities and emission peaks (WMs) with a narrow bandwidth in the midinfrared region under heat treatment. The redundant SPP modes and Bragg scattered WMs are filtered automatically by shifting them to the short wavelength due to a short period where blackbody radiations are too weak to appear.
Keywords :
Bragg gratings; light scattering; optical waveguides; Bragg scattered waveguide modes; blackbody radiations; emission peaks; heat treatment; high output intensities; midinfrared region; midinfrared waveguide thermal emitters; narrow bandwidth; redundant SPP modes; subwavelength holes; surface plasmon polariton modes; Bragg scattering; Fabry–Pérot resonator; surface plasmon; waveguide filters;
Journal_Title :
Photonics Technology Letters, IEEE
Conference_Location :
6/7/2010 12:00:00 AM
DOI :
10.1109/LPT.2010.2051221
