Four-dimensional light shaping: manipulating ultrafast spatiotemporal foci in space and time
| Autor: | Martin J. Booth, Patrick S. Salter, Michael Schmidt, Bangshan Sun, Johannes Heberle, Clemens Roider, Alexander Jesacher, Johannes Strauss |
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| Rok vydání: | 2018 |
| Předmět: |
Focus (geometry)
Holography Physics::Optics 02 engineering and technology 01 natural sciences Article law.invention 010309 optics Optics law 0103 physical sciences Microscopy laser material processing Coupling Physics business.industry Plane (geometry) 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Tilt (optics) light shaping ultrafast lasers 0210 nano-technology business Ultrashort pulse spatiotemporal focusing Light field |
| Zdroj: | Light, Science & Applications Light: Science & Applications |
| ISSN: | 2047-7538 |
| Popis: | The spectral dispersion of ultrashort pulses allows the simultaneous focusing of light in both space and time, which creates so-called spatiotemporal foci. Such space–time coupling may be combined with the existing holographic techniques to give a further dimension of control when generating focal light fields. In the present study, it is shown that a phase-only hologram placed in the pupil plane of an objective and illuminated by a spatially chirped ultrashort pulse can be used to generate three-dimensional arrays of spatio-temporally focused spots. By exploiting the pulse front tilt generated at focus when applying simultaneous spatial and temporal focusing (SSTF), it is possible to overlap neighboring foci in time to create a smooth intensity distribution. The resulting light field displays a high level of axial confinement, with experimental demonstrations given through two-photon microscopy and the non-linear laser fabrication of glass. |
| Databáze: | OpenAIRE |
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