Far-field diffraction of linear chirped gratings
| Autor: | Luis Miguel Sanchez-Brea, Francisco Jose Torcal-Milla, Jeronimo Buencuerpo |
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| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Angular range Gaussian Plane wave Physics::Optics Near and far field 02 engineering and technology Grating 01 natural sciences 010309 optics symbols.namesake Optics 0103 physical sciences Physics::Atomic Physics Electrical and Electronic Engineering Computer Science::Databases Physics Analytical expressions business.industry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols Spatial frequency 0210 nano-technology business |
| Zdroj: | Optics & Laser Technology. 107:337-343 |
| ISSN: | 0030-3992 |
| Popis: | We analyze the far-field diffraction pattern produced by linear spatial chirped gratings. An intuitive analytical interpretation of the generated diffraction orders is proposed for gratings with linear variation of the period and linear variation of the spatial frequency. Also, experiments using Gaussian beams and plane wave illumination are performed. The analytical expressions are compared to numerical and experimental results, showing a high agreement. Chirped gratings can be implemented in interesting applications: we analyze how they can be used as a deflector, since tunable direction of diffracted orders can be achieved by displacing laterally the grating with respect to the incident light beam. Also the angular width of diffraction orders can be controlled and chirped gratings can be used to generate uniform illumination over a controlled angular range. These two applications have also been experimentally shown. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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