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Grating profile optimization for narrow-band or broad-band infrared emitters with differential evolution algorithms
1Department of Mechanical Engineering, National Cheng Kung University, Tainan City 701, Taiwan.
Optics Letters
|February 6, 2013
Summary
Differential evolution methods optimized omnidirectional grating profiles for infrared emitters. Method superiority depends on parameter dimensions, enabling successful development of narrow-band and broad-band devices.
Area of Science:
- Optics and Photonics
- Computational Physics
- Materials Science
Background:
- Omnidirectional gratings are crucial for controlling light emission.
- Optimizing grating profiles is essential for achieving desired spectral characteristics.
Purpose of the Study:
- To optimize omnidirectional grating profiles for specific infrared emittance spectra.
- To compare the efficiency of stochastic methods for profile optimization.
Main Methods:
- Utilized a stochastic method, differential evolution (DE), and its variant, micro-DE.
- Applied these methods to optimize grating profiles under various constraints.
Main Results:
- Successfully developed both narrow-band and broad-band infrared emitters.
- Demonstrated that the efficiency of DE and micro-DE depends on the number of parameters.
- Showcased the performance of optimized emitters considering orientation and fabrication tolerance.
Conclusions:
- Differential evolution methods are effective for optimizing complex grating profiles.
- The choice of optimization method should consider the dimensionality of the problem.
- Developed emitters show promise for infrared applications.
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