Nonlinear optics revolutionized the ability to create directed, laser-like light particularly in the regions where lasers based on conventional population inversion are not practical. New breakthroughs in attosecond extreme nonlinear optics promise a similar revolution in the X-ray regime.
In this talk, I will discuss the fundamental quantum physics and the phase matching limits of high order harmonic generation in the context of creating coherent X-ray waveforms in the soft X-ray region that can be tailored at the moment of generation. Such a versatile designer light is ideal for 4D studies of various bio- and nano-materials systems with attosecond temporal and nanometer spatial resolution, as well as with element specificity. I will also discuss the path forward for generating bright coherent X-ray beams from a laboratory-scale apparatus at photon energies of 10 keV and greater with unprecedented attosecond-to-zeptosecond pulse durations, and with arbitrary spectral, temporal shapes, and polarization states. A fully spatially and temporally coherent version of the Roentgen X-ray tube with exquisite quantum control of the properties of the soft and hard X-ray light may be possible.
1. T. Popmintchev, et al., Nature Photonics 4, 822 (2010); Science 336, 1287 (2012).
2. D. Popmintchev, et al., Science 350, 1225 (2015).
3. T. Fan, et al., PNAS 112, 14206 (2015).
Tenio Popmintchev, "Design of coherent x-rays for 5D imaging at the space-time resolution extreme (Conference Presentation)," Proc. SPIE 10102, Ultrafast Phenomena and Nanophotonics XXI, 1010217 (Presented at SPIE OPTO: February 01, 2017; Published: 19 April 2017); https://doi.org/10.1117/12.2253556.5391659180001.
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