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Title: Nonlinear optics: Attosecond nanophotonics

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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
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OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature Photonics; Journal Volume: 11; Journal Issue: 4
Country of Publication:
United States

Citation Formats

Vampa, Giulio, Fattahi, Hanieh, Vučković, Jelena, and Krausz, Ferenc. Nonlinear optics: Attosecond nanophotonics. United States: N. p., 2017. Web. doi:10.1038/nphoton.2017.41.
Vampa, Giulio, Fattahi, Hanieh, Vučković, Jelena, & Krausz, Ferenc. Nonlinear optics: Attosecond nanophotonics. United States. doi:10.1038/nphoton.2017.41.
Vampa, Giulio, Fattahi, Hanieh, Vučković, Jelena, and Krausz, Ferenc. Tue . "Nonlinear optics: Attosecond nanophotonics". United States. doi:10.1038/nphoton.2017.41.
title = {Nonlinear optics: Attosecond nanophotonics},
author = {Vampa, Giulio and Fattahi, Hanieh and Vučković, Jelena and Krausz, Ferenc},
abstractNote = {},
doi = {10.1038/nphoton.2017.41},
journal = {Nature Photonics},
number = 4,
volume = 11,
place = {United States},
year = {Tue Apr 04 00:00:00 EDT 2017},
month = {Tue Apr 04 00:00:00 EDT 2017}
  • The process of high-order harmonic generation (HHG) can be used to generate bright, coherent beams of light in the extreme-ultraviolet and soft x-ray region of the spectrum by upconverting intense femtosecond pulses to very short wavelengths. These high-order harmonics result from ionization of the gas used as a nonlinear medium; thus, a full understanding of the process involves incorporating atomic physics, quantum dynamics, and plasma physics into an already non-trivial nonlinear optics problem. In the past several years, we have developed a new technology of 'extreme' nonlinear optics that uses the rich, attosecond time-scale physics of the process in novelmore » ways to manipulate the characteristics of this source, improving both the flux and the spectral characteristics. Most recently, we have (1) demonstrated that quasi phase matching of the high-order harmonic conversion process can be accomplished by the use of weak counterpropagating pulse trains that modulate the conversion process, constituting a nonlinear-optical 'crystal' made of light; and (2) we have demonstrated that high-order harmonics can be generated by ionization of ions in a guided-wave geometry, using a discharge-created plasma waveguide to pre-ionize the gas and form a guiding electron density profile.« less
  • We report nonlinear multiphoton processes in atoms and molecules by intense high harmonics and their applications to attosecond pulse characterization. Phase matched high harmonics by a loosely focusing geometry produce highly focusable intensity with fully spatiotemporal coherence, which is sufficient to induce nonlinear optical phenomena in the extreme ultraviolet and soft x-ray (XUV) region. With this XUV coherent light source, two-photon double ionization in He is demonstrated with 42-eV high harmonic photons. On the other hand, when intense high harmonics around 20 eV is subjected to N{sub 2} molecules, occurrence of Coulomb explosion following to two-photon double ionization is observedmore » in attosecond temporal precision. Taking advantage of larger cross section of two-photon ionization in molecules, we successfully perform the interferometric autocorrelation of an attosecond pulse train with the ion signals produced by Coulomb explosion of nitrogen molecules. The result reveals the phase relation between attosecond pulses in the train.« less
  • Abstract Two-dimensional materials have emerged as promising candidates to augment existing optical networks for metrology, sensing, and telecommunication, both in the classical and quantum mechanical regimes. Here, we review the development of several on-chip photonic components ranging from electro-optic modulators, photodetectors, bolometers, and light sources that are essential building blocks for a fully integrated nanophotonic and quantum photonic circuit.
  • We present an approach for controlling attosecond pulses just like one controls femtosecond pulses nowadays. Using an adequate medium constituted of aligned and pre-dissociated molecules associated with a ''seed'' attosecond pulse and a control ir field, we propose a scheme for generating secondary attosecond pulses with a high degree of control of their characteristics. By solving the time-dependent Schroedinger equation for a model pre-dissociated molecule (H{sub 2}{sup +}) irradiated by the control ir field and seed xuv pulse, we demonstrate that one can generate such well-controlled secondary attosecond pulses by achieving frequency tuning and up-shifting and control on the chirpmore » of the secondary pulses, which can even be significantly shorter than the seed. We also show that their characteristics can be accurately predicted with a simple classical approach.« less
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