Divergence Control of High-Harmonic Generation

Generation and control of high-harmonic radiation

Quantum Optimal Control of High-Harmonic Generation from Molecular Systems

Every scale needs right tools and devices to enable researchers to study and even control phenomena in that area. Given the fact that many fundamental phenomena in condensed matter physics and chemistry, such as chemical bonding or charge transfer, are happening on attosecond scale has encouraged researchers to look for essential tools for inspecting this region. At the present time, high-harmo...

Control of laser high-harmonic generation with counterpropagating light.

Relatively weak counterpropagating light is shown to disrupt the emission of laser high-harmonic generation. Harmonic orders ranging from the teens to the low thirties produced by a 30-femtosecond pulse in a narrow argon jet are "shut down" with a contrast as high as 2 orders of magnitude by a chirped 1-picosecond counterpropagating laser pulse (60 times less intense). Alternatively, under poor...

Broadband Spectral Amplitude Control in High-Order Harmonic Generation

A technique for broadband spectral amplitude control of light pulses produced in high-order harmonic generation (HHG) is presented. It has been shown elsewhere that broadband spectral phase control in HHG is achievable using a computerized feedback loop scheme by coherently adding a filtered region of the HHG emission to the intense IR driving pulse with optimal attenuation and time delay param...

Wavelength scaling of high harmonic generation efficiency.

Using longer wavelength laser drivers for high harmonic generation is desirable because the highest extreme ultraviolet frequency scales as the square of the wavelength. Recent numerical studies predict that high harmonic efficiency falls dramatically with increasing wavelength, with a very unfavorable lambda(-(5-6)) scaling. We performed an experimental study of the high harmonic yield over a ...