Enhanced high-harmonic generation from an all-dielectric metasurface
| Autor: | Jingyuan Linda Zhang, Giulio Vampa, Cheng Guo, Tomas Sarmiento, Philip H. Bucksbaum, Hanzhe Liu, Jelena Vuckovic, Meng Xiao, Shanhui Fan, David A. Reis |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
business.industry Electromagnetically induced transparency FOS: Physical sciences Physics::Optics General Physics and Astronomy 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Harmonics 0103 physical sciences High harmonic generation Optoelectronics Photonics 010306 general physics 0210 nano-technology business Ultrashort pulse Excitation Optics (physics.optics) Physics - Optics |
| Zdroj: | Nature Physics. 14:1006-1010 |
| ISSN: | 1745-2481 1745-2473 |
| Popis: | The recent observation of high-harmonic generation from solids creates a new possibility for engineering fundamental strong-field processes by patterning the solid target with subwavelength nanostructures. All-dielectric metasurfaces exhibit high damage thresholds and strong enhancement of the driving field, making them attractive platforms to control high-harmonics and other high-field processes at nanoscales. Here we report enhanced non-perturbative high-harmonic emission from a Si metasurface that possesses a sharp Fano resonance resulting from a classical analogue of electromagnetically induced transparency. Harmonic emission is enhanced by more than two orders of magnitude compared to unpatterned samples. The enhanced high harmonics are highly anisotropic with excitation polarization and are selective to excitation wavelength due to its resonant feature. By combining nanofabrication technology and ultrafast strong-field physics, our work paves the way for designing new compact ultrafast photonic devices that operate under high intensities and short wavelengths. 14 pages, 4 figures |
| Databáze: | OpenAIRE |
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