Doppler effect as a tool for ultrashort electric field reconstruction

Béjot, Pierre; Szmygel, E.; Dubrouil, A.; Billard, F.; Lavorel, B.; Faucher, O.; Hertz, E.

doi:10.1364/ol.402935

Cited by 8 publications

(8 citation statements)

References 30 publications

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“…The rotational Doppler shift (RDS) has been reported with waveplates in mechanical rotation [29] or with rotating molecules [10,11], but our approach relies on a third-order instantaneous electronic Kerr effect produced by pulses of twisted linear polarization (TLP). As shown in our previous work [14], the overall mechanism is perfectly phase-matched and provides a direct phase retrieval. It lifts, therefore, the inherent flaws of the SD phenomenon.…”

Section: Introductionsupporting

confidence: 61%

“…This paper provides an extended discussion and substantiation of the recently reported DEER-SPIDER method [14]. The major innovation relies on the use of the rotational Doppler effect enabling the production of a frequency shear in the absence of frequency up-conversion.…”

Section: Conclusion and Discussionmentioning

confidence: 88%

“…The use of a third-order nonlinear effect through spectral interferometry is nevertheless very attractive for a self-referenced and single-shot measurement of weak UV pulses. We have shown in this issue [14] the relevance of the rotational Doppler frequency shift [7,10,11] enabling the production of two sheared replica of an unknown pulse at/near the original wavelength. The rotational Doppler shift (RDS) has been reported with waveplates in mechanical rotation [29] or with rotating molecules [10,11], but our approach relies on a third-order instantaneous electronic Kerr effect produced by pulses of twisted linear polarization (TLP).…”

Section: Introductionmentioning

confidence: 97%

“…It has also been used in photoelectron spectroscopy for probing molecular orbitals anisotropy [8], in satellite-based GPS navigation systems [9], or to measure the angular speed of coherently spinning molecules [10][11][12][13]. We have recently reported [14] its relevance in a radically different field of applications, namely the ultrashort pulse characterization, by proposing a variant of the spectral phase interferometry for direct electric field reconstruction (SPIDER). The method is called Doppler effect E-field replication-SPIDER (DEER-SPIDER).…”

Section: Introductionmentioning

confidence: 99%

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Characterizing ultrashort laser pulses by the rotational Doppler effect

Szmygel

Béjot

Dubrouil³

et al. 2021

Phys. Rev. A

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Technological advances in femtosecond laser sources call for the development of increasingly refined characterization tools implying to enrich the existing panel of operable nonlinear interactions. Toward that end, we have recently proposed a variant of SPIDER (spectral phase interferometry for direct electric field reconstruction) based on a nonstandard effect for producing the frequency shear, the so-called rotational Doppler effect. The method called DEER-SPIDER, for Doppler effect E-field replication, has the advantage of producing a spectral shearing at/near the fundamental wavelength, thus allowing operation in the ultraviolet spectral range. The present paper provides a deeper study of this approach. The method is tested under two different challenging conditions, and a thorough theoretical analysis is proposed. Possible improvements and an outlook are also discussed.

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Section: Introductionsupporting

confidence: 61%

Section: Conclusion and Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterizing ultrashort laser pulses by the rotational Doppler effect

Szmygel

Béjot

Dubrouil³

et al. 2021

Phys. Rev. A

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“…These two methods provide a complete knowledge of the ultrashort laser pulse by reconstructing both the spectral (or temporal) amplitude and phase of the electric field. Several FROG [3,4,[6][7][8] or SPIDER [3,5,[9][10][11] variants have been developed to extend the scope of measurements. From an experimental point of view, the most popular and simple family of characterization methods remains the second-order autocorrelation where * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Spectral phase reconstruction of femtosecond laser pulse from interferometric autocorrelation and evolutionary algorithm

Moreau

Billard²,

Béjot³

et al. 2022

Optics Communications

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We report on the complete temporal characterization of femtosecond laser pulses from second-order interferometric autocorrelation and laser spectrum measurements. The method exploits a newly developed autocorrelator based on a two photon-absorption signal produced directly within a camera sensor so as to provide a single-shot interferometric autocorrelation of great reliability and robustness. Interferometric autocorrelation trace and laser spectrum are exploited for a spectral phase retrieval via an evolutionary algorithm. The quality of the reconstruction for highly modulated spectral phases imprinted by a pulse shaper confirms the reliability of the method. The autocorrelator is compact, robust and easy to use. Possible improvements are discussed.

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Generation and Control of Coherent Terahertz Phonons in Silicon Metasurfaces

Martins

Petit

Brûlé

et al. 2022

Advanced Optical Materials

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free carrier creation and electron-phonon relaxations allowing the dissipation of the laser pulse energy into phonons. [6] For instance, Hudert and co-workers [7] demonstrated that femtosecond pulses are generating coherent acoustic phonons in silicon membranes, the latter phonons being detected by monitoring the changes of the dielectric constant in a pump probe experiment. In 1996, Hase and co-workers demonstrated that such coherent acoustic phonons, generated in a bismuth thin film, are interfering when generated by two delayed pulses. [8] Other experiments on thin films have demonstrated acoustic phonons propagation and reflections in layered media yielding to the determination of their velocity and their energy [7] and the fabrication of multilayered media or phononic crystals offers way of manipulating coherent acoustic phonons. [9] As such ultrafast lasers related techniques are offering a large avenue to study and control phonons at nanoscale in order to establish the design rules for future heat sinks at nanoscale. However, once miniaturization is pushed to its lower limit reaching, standard pump-probe reflection techniques relying on the detection of phonon wave propagation and reflection in thin films [7,8] are not relevant anymore when nanostructure dimensions are of the order of magnitude of optical wavelengths. Alternative approaches are required to investigate the phonons properties of acoustic phonon frequency.To address this bottleneck, we have implemented an alternative approach to probe high frequency phonons up to in the 1 to 20 THz range relying on inelastic scattering spectroscopy coupled to femtosecond pulses. Our approach allows to directly access to the acoustic phonon spectrum, which usually require to collect the time-dependent reflectivity Fourier transform. [7,8] Furthermore, we demonstrate that the temporal and spectral shaping of femtosecond pulses controls this coherent acoustic phonon emission spectrum in silicon metasurfaces.

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Doppler effect as a tool for ultrashort electric field reconstruction

Cited by 8 publications

References 30 publications

Characterizing ultrashort laser pulses by the rotational Doppler effect

Characterizing ultrashort laser pulses by the rotational Doppler effect

Spectral phase reconstruction of femtosecond laser pulse from interferometric autocorrelation and evolutionary algorithm

Generation and Control of Coherent Terahertz Phonons in Silicon Metasurfaces

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