New Mid-Infrared Light Sources

Biegert, J.; Bates, Philip K.; Chalus, Olivier

doi:10.1109/jstqe.2011.2135842

Cited by 56 publications

(36 citation statements)

References 39 publications

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“…Rapid development of high-peak-power near-and midinfrared ultrashort-pulse laser sources, which are exclusively based on optical parametric amplification [1][2][3], opens exciting possibilities in the emerging field of ultrafast midinfrared nonlinear optics and strong-field physics, allowing studies of nonlinear-optical phenomena in a new regime of laser-matter interaction [4]. Recent experiments established unprecedented landmarks in high-order harmonic generation in gaseous [5], solid-state [6], and liquid [7] dielectric media.…”

Section: Introductionmentioning

confidence: 99%

Third- and fifth-harmonic generation in transparent solids with few-optical-cycle midinfrared pulses

et al. 2014

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We report an experimental and numerical investigation of third-and fifth-harmonic generation in a CaF 2 crystal with 20 fs (three-optical-cycle), 2 μm driving pulses. The double-peaked temporal profile of the third-harmonic pulse and its propagation dynamics was captured by means of the cross-correlation technique, showing that the third-harmonic pulse naturally consists of free and driven components propagating with different group velocities, and which occur without the splitting of the driving pulse at the fundamental frequency. Relevant characteristics of the harmonics generation process, such as the harmonics spectra, energy oscillations, and conversion efficiency, were measured as functions of propagation length and input-pulse energy and intensity. Our results demonstrate that the fifth harmonic is generated solely via cascaded four-wave mixing between the fundamental and third-harmonic frequency pulses due to cubic nonlinearity, without any detectable contribution of six-wave mixing due to quintic nonlinearity in the process.

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Section: Introductionmentioning

confidence: 99%

Third- and fifth-harmonic generation in transparent solids with few-optical-cycle midinfrared pulses

et al. 2014

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“…Mid-IR probing removes ambiguities between tunneling and multi-photon processes, but unfavorable scaling of cross-sections, and lack of mid-IR ultrafast technology, has largely prevented this approach. We now enable such measurements with a specifically designed mid-IR light source7 (see Methods), which fulfills all requirements and is perfectly matched to a reaction microscope thereby permitting rapid and high-precision data acquisition. We show here the power of our method by applying it to the recent unexpected low-energy structures (LES).…”

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confidence: 99%

Ionization with low-frequency fields in the tunneling regime

Durá

Camus

Thai

et al. 2013

Sci Rep

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Strong-field ionisation surprises with richness beyond current understanding despite decade long investigations. Ionisation with mid-IR light has promptly revealed unexpected kinetic energy structures that seem related to unanticipated quantum trajectories of the electrons. We measure first 3D momentum distributions in the deep tunneling regime (γ = 0.3) and observe surprising new electron dynamics of near-zero momentum electrons and extremely low momentum structures, below the eV, despite very high quiver energies of 95 eV. Such level of high-precision measurements at only 1 meV above the threshold, despite 5 orders higher ponderomotive energies, has now become possible with a specifically developed ultrafast mid-IR light source in combination with a reaction microscope, thereby permitting a new level of investigations into mid-IR recollision physics.

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“…Today OPCPA schemes are particularly interesting for very short pulse duration (<10 fs) and high repetition rate (MHz) [29,30], as well as for carrier wavelengths in the IR and mid-infrared (MIR) spectral regions, where no conventional broadband laser media exist [31].…”

Section: Experimental Setup and Requirementsmentioning

confidence: 99%

Imaging Localized Surface Plasmons by Femtosecond to Attosecond Time‐Resolved Photoelectron Emission Microscopy – “ATTO‐PEEM”

Chew

Pearce

Scheffold

et al. 2014

Attosecond Nanophysics

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The direct detection of the spatiotemporal dynamics of nanolocalized optical near-fields on nanostructured metal surfaces, for example, imaging of localized surface plasmons (cf. Chapter 1) on rough or nanostructured metal films or the imaging of propagating surface plasmon polaritons at a vacuum-metal or metal-dielectric interface is a prerequisite to further control and optimize surface-plasmon based ultrafast nanooptics for future device development and applications [1][2][3][4].While free electrons in metals collectively respond to excitation from a light pulse, which is resonant to the surface plasmon frequency of the system, and squeeze and amplify the field intensity of the incoming plane light field into a subwavelength spatial volume, the typically broad frequency bandwidth of surface plasmon resonances supports an ultrafast response of these fields with rapid field changes on sub-femtosecond time scales [5].The sub-wavelength nanoscaled localization of optical fields in the vicinity of metal nanostructures and the ultrafast temporal evolution of such fields on a 0.1-100 fs time scale require the invention and development of new experimental methodologies, which combine nanometer (sub-optical) spatial resolution, sub-femtosecond temporal resolution, and optionally further nanospectroscopic information.Resolving the spatial distribution of such fields requires a microscopic technique with sub-optical spatial resolution, for example, in the 10-100 nm range. Scanning near-field optical microscopy (SNOM) techniques have been successfully applied with spatial resolutions of about ∼100 nm; however, the combination with ultrashort light pulses is still very difficult. Photoemission electron microscopy (PEEM) is a technique capable of resolving the spatial emission distribution of photoelectrons with an ultimate resolution of ∼10 nm.

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New Mid-Infrared Light Sources

Cited by 56 publications

References 39 publications

Third- and fifth-harmonic generation in transparent solids with few-optical-cycle midinfrared pulses

Third- and fifth-harmonic generation in transparent solids with few-optical-cycle midinfrared pulses

Ionization with low-frequency fields in the tunneling regime

Imaging Localized Surface Plasmons by Femtosecond to Attosecond Time‐Resolved Photoelectron Emission Microscopy – “ATTO‐PEEM”

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