Engineering optical anisotropy in nonlinear crystals with ultrafast light
| Autor: | Wieslaw Krolikowski, Cyril Hnatovsky, Pawel Karpinski, Vladlen G. Shvedov |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
optical properties
Materials science Lithium niobate nonlinear optical crystals Physics::Optics General Physics and Astronomy 02 engineering and technology 01 natural sciences law.invention Condensed Matter::Materials Science chemistry.chemical_compound law 0103 physical sciences Anisotropy femtosecond lasers optical microscopy 010302 applied physics Birefringence business.industry Metamaterial self assembly 021001 nanoscience & nanotechnology Laser form birefringence metamaterials chemistry Femtosecond crystalline solids effective medium approximation Optoelectronics Photonics 0210 nano-technology business Ultrashort pulse |
| Zdroj: | Journal of Applied Physics. 127:153104 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/5.0003589 |
| Popis: | Photonic technology is widely based on anisotropic (and) nonlinear materials, which allow light modulation and parametric light conversion. Because the number of naturally occurring crystals is limited, there is a growing demand for artificial metamaterials with optical properties specifically tailored to a given application. Here, we utilize the top-down method to synthesize sub-wavelength periodic nanostructures inside a uniaxial optically nonlinear crystal (lithium niobate, LiNbO₃) by irradiating it with multiple femtosecond laser pulses. By superimposing form-birefringence associated with the light-induced nanostructures onto natural birefringence of the host crystal we create macroscopic domains of a biaxial metamaterial embedded into otherwise uniaxial medium. |
| Databáze: | OpenAIRE |
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