Category: High Intensity

Making of 3D diamond detectors

Intense laser pulses write graphitic electrodes in diamond in order to produce 3D pixel sensors optimised for timing applications at future hadron colliders. Just published in Instruments.

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Limits to XUV frequency combs?

By measuring the tiny phase fluctuations between consecutive pulses from an infrared laser frequency comb we pose stringent limits to the extension of its spectroscopic and metrological applications towards the extreme ultraviolet. Just appeared in PRL.

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Random-sampling XUV Ramsey spectroscopy

We demonstrate a new scheme for performing Ramsey-type spectroscopy of XUV atomic transitions with high-order harmonics. Random time-sampling intervals are used to achieve absolute XUV frequency measurements at high accuracy and resolution.

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High-resolution Ramsey XUV spectroscopy on bound atomic states

We demonstrate the potential of a Ramsey spectroscopic scheme based on high-order harmonics to reach a resolving power >10^5 in the XUV. This is done by measuring clear quantum interferences in the excitation of an Argon transition at 87 nm for XUV pulse delays larger than 100 ps.

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Simple quasi-phase-matching in high-order harmonic generation

We demonstrate a simple technique for enhancing harmonic conversion yields by an array of gas interaction zones.

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Direct interferometric measurement of atomic dipole phases in high-order harmonic generation

We have used an interferometric technique to directly measure the intrinsic nonlinear phase related to the different electronic trajectories involved in high-order harmonic generation in the XUV.

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