A piezoelectric beam chopper

Allam, D. S.

doi:10.1088/0022-3735/3/12/426

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…In this article we present a new photoacoustc Bragg switch that allows to shorten hard x-ray pulses emitted from synchrotron storage rings down to few picoseconds. The idea of switching a synchrotron x-ray pulse a) Electronic mail: pgaal@physnet.uni-hamburg.de with a controlled lattice deformation is almost 50 years old 12 . Since then, several attempts were made that relied on piezoelectric excitation 13,14 , generation of optical 15,16 and acoustic 17,18 phonons or picosecond thermal 19 excitations.…”

Section: Introductionmentioning

confidence: 99%

“…In this article we present a new photoacoustic Bragg switch that allows the shortening of hard X-ray pulses emitted from synchrotron storage rings, down to a few picoseconds. The idea of switching a synchrotron X-ray pulse with a controlled lattice deformation is almost 50 years old (Allam, 1970). Since then, several attempts have been made that relied on piezoelectric excitation (Grigoriev et al, 2006;Zolotoyabko & Quintana, 2004), the generation of optical (Bucksbaum & Merlin, 1999;Sheppard et al, 2005) and acoustic phonons (Gaal et al, 2014;Sander et al, 2016) or picosecond thermal excitations (Navirian et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Demonstration of a picosecond Bragg switch for hard X-rays in a synchrotron-based pump–probe experiment

Sander

Bauer

Kabanova

et al. 2019

J Synchrotron Radiat

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A benchmark experiment is reported that demonstrates the shortening of hard X‐ray pulses in a synchrotron‐based optical pump–X‐ray probe measurement. The pulse‐shortening device is a photoacoustic Bragg switch that reduces the temporal resolution of an incident X‐ray pulse to approximately 7.5 ps. The Bragg switch is employed to monitor propagating sound waves in nanometer thin epitaxial films. From the experimental data, the pulse duration, diffraction efficiency and switching contrast of the device can be inferred. A detailed efficiency analysis shows that the switch can deliver up to 109 photons s−1 in high‐repetition‐rate synchrotron experiments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Demonstration of a picosecond Bragg switch for hard X-rays in a synchrotron-based pump–probe experiment

Sander

Bauer

Kabanova

et al. 2019

J Synchrotron Radiat

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“…Several early attempts were made to manipulate the time structure of the synchrotron X-ray pulse directly. Early experiments reported switching of hard X-rays resulting in pulses of 100 ps duration and more (Wark et al, 1989;Zolotoyabko & Quintana, 2004;Allam, 1970;Grigoriev et al, 2006;Navirian et al, 2011). A promising concept is based on optical phonons (Bucksbaum & Merlin, 1999); however, this could not yet be realised experimentally (Sheppard et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Ultrafast switching of hard X-rays

Gaal

Schick

Herzog

et al. 2014

J Synchrotron Radiat

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A new concept for shortening hard X-ray pulses emitted from a third-generation synchrotron source down to few picoseconds is presented. The device, called the PicoSwitch, exploits the dynamics of coherent acoustic phonons in a photo-excited thin film. A characterization of the structure demonstrates switching times of ≤ 5 ps and a peak reflectivity of ∼10(-3). The device is tested in a real synchrotron-based pump-probe experiment and reveals features of coherent phonon propagation in a second thin film sample, thus demonstrating the potential to significantly improve the temporal resolution at existing synchrotron facilities.

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“…The idea to use the piezoelectric effect to modulate a beam of radiation is over 30 years old. 12 Originally, beams were modulated by a macroscopic translation of large optical elements by a piezoelectric ceramic. Recently acoustic standing waves in a piezoelectric crystal were used to modulate synchrotron x rays at time scales of tens of nanoseconds.…”

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confidence: 99%

Subnanosecond piezoelectric x-ray switch

Grigoriev

Kim

et al. 2006

Applied Physics Letters

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We report an ultrafast piezoelectric switch for synchrotron x rays. A thin epitaxial film of piezoelectric Pb͑Zr, Ti͒O 3 works as a diffractive optical switch at frequencies from dc to Ͼ1 GHz. The broad frequency range allows single bunches of synchrotron x rays to be selected in an arbitrary sequence. The piezoelectric effect introduces mechanical strains of a fraction of 1% in the Pb͑Zr, Ti͒O 3 film, which can be used for blocking or passing diffracted x rays.

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A piezoelectric beam chopper

Cited by 5 publications

References 3 publications

Demonstration of a picosecond Bragg switch for hard X-rays in a synchrotron-based pump–probe experiment

Demonstration of a picosecond Bragg switch for hard X-rays in a synchrotron-based pump–probe experiment

Ultrafast switching of hard X-rays

Subnanosecond piezoelectric x-ray switch

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