The transmission, reflection and polarization properties of diffractive elements like diffraction gratings are easily simulated and analyzed by Lumerical's products and their built-in grating analysis functions
Overview
Diffraction gratings consist of a periodic array of optical elements of differing permittivity. Like photonic crystals, gratings exhibit strong diffractive effects which can be used to design components that are wavelength selective. Illuminated from the surface, diffraction gratings can be used as a means by which the different spectral components of the incoming radiation can be spatially resolved. Similarly, metallic gratings can be used to separate different polarizations of incoming radiation through so-called microwire or nanogrid polarizers.
Alternatively, when illuminated in the plane, gratings can be used to realize integrated filtering functions by reflecting some wavelengths while other wavelengths propagate through the structure. In both cases, intentional variations in grating periodicity as with chirped gratings, or accidental random imperfections to the grating period can result in less frequency-selective behaviour.
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"We use FDTD Solutions on a small cluster to quickly and conveniently optimize Bragg sidewall gratings in ridge waveguide lasers."
- Dr. R. Dylewicz, Glasgow University
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Benefits
FDTD Solutions can be used to calculate the following properties relevant to gratings:
- Diffraction orders for idealized square tooth, sinusoidal, blazed and custom gratings
- The impact of grating imperfections on grating performance
- Reflection and transmission characteristics
- Stop and pass bands for in-plane incidence of Bragg, DFB, DBR gratings for waveguides and cavities
- Polarization selectivity and extinction ratio for microwire and nanogrid polarizers
- Imaging of grating orders through finite NA objectives
- Design of grating input/output couplers
- The impact of grating defects on scattered far field radiation profiles
Featured Publications Showcasing Lumerical's Products
| Bhavin J. Bijlani and Amr S. Helmy, "Bragg reflection waveguide diode lasers," Opt. Lett. 34, 3734-3736 (2009) http://www.opticsinfobase.org/abstract.cfm?URI=ol-34-23-3734 |
| E. Bisaillon, D. Tan, B. Faraji, A. Kirk, L. Chrowstowski, and D. V. Plant, "High reflectivity air-bridge subwavelength grating reflector and Fabry-Perot cavity in AlGaAs/GaAs," Opt. Express 14, 2573-2582 (2006) http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-7-2573 |
| Christopher Chase, Ye Zhou, and Connie J. Chang-Hasnain, "Size effect of high contrast gratings in VCSELs," Opt. Express 17, 24002-24007 (2009) http://www.opticsinfobase.org/abstract.cfm?URI=oe-17-26-24002 |
| Hideo Iwase, Satoshi Kokubo, Saulius Juodkazis, and Hiroaki Misawa, "Suppression of ripples on ablated Ni surface via a polarization grating," Opt. Express 17, 4388-4396 (2009) http://www.opticsinfobase.org/abstract.cfm?URI=oe-17-6-4388 |
| Nanfang Yu, Mikhail A. Kats, Christian Pflugl, Markus Geiser, Qi Jie Wang, Mikhail A. Belkin, Federico Capasso, Milan Fischer, Andreas Wittmann, Jerome Faist, Tadataka Edamura, Shinichi Furuta, Masamichi Yamanishi, and Hirofumi Kan, "Multi-beam multi-wavelength semiconductor lasers," Appl. Phys. Lett. 95, 161108 (2009), DOI:10.1063/1.3253713 |
| Y. Zhou, H. Tan and D. J. Klotzkin, "Small area right angle bends fabricated with hybrid conventional and interference lithography," Microwave and Optical Technology Letters 49, 1300-1303 (2007), DOI: 10.1002/mop.22408 |
| M. A. Mossman, V. H. Kwong, J. Pond, and L. A. Whitehead, "A high reflectance, wide viewing angle reflective display using total internal reflection in micro-hemispheres," in Society for Information Display Symposium Proceedings (Society for Information Display, San Jose, Calif., 2003), Vol. 23, pp. 233-235. |
| Jun Wang, Wei Zhou, and Er-Ping Li, "Enhancing the light transmission of plasmonic metamaterials through polygonal aperture arrays," Opt. Express 17, 20349-20354 (2009) http://www.opticsinfobase.org/abstract.cfm?URI=oe-17-22-20349 |
| Y. Zhu, Z. He, J. Kanka and J. Du, "Numerical analysis of refractive index sensitivity of long-period gratings in photonic crystal fiber," Sensors and Actuators, B: Chemical 129, 99-105 (2008) |
| T. Hashimoto, S. Juodkazis and H. Misawa, "Void recording in silica," Applied Physics A: Materials Science & Processing 83 (2), 337-240 (2006), DOI: 10.1007/s00339-006-3501-8 |
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