A stochastic method and its variants, differential evolution (DE) and micro-DE, were employed to optimize profiles of omnidirectional gratings for desired emittance spectra. Both narrow-band and broad-band infrared emitters were developed successfully from assigned profile types with different complexity and dimension constraints. The efficiency in determining profiles from each method was compared to demonstrate that the superiority of each method is dependent on the number of parameters (dimensions). The performance of the proposed emitters was further discussed considering the emission orientation and fabrication tolerance.
© 2012 Optical Society of America
Original Manuscript: March 22, 2012
Revised Manuscript: June 26, 2012
Manuscript Accepted: June 26, 2012
Published: August 8, 2012
J.-S. Chen, P. D. Lin, F.-C. Chiu, and Y.-B. Chen, "Grating profile optimization for narrow-band or broad-band infrared emitters with differential evolution algorithms," Opt. Lett. 37, 3399-3401 (2012)