عنوان

On the Generation of Intense Isolated Attosecond Pulses by Many-Cycle Laser Fields

(Number (ISBN

9783642183263

(Number (ISBN

9783642183270

Number

b601243

Title Proper

On the Generation of Intense Isolated Attosecond Pulses by Many-Cycle Laser Fields

General Material Designation

[Book]

First Statement of Responsibility

Paris Tzallas Affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 1527, Heraklion, Crete, GR-711 10, Greece

Text of Note

Real-time observation of ultrafast dynamics in all states of matter requires temporal resolution on the atomic unit of time (24.189 asec) ( ). Tools for tracking such ultrafast dynamics are ultrashort light pulses. During the last decade, continuous efforts in ultrashort pulse engineering led to the development of light pulses width duration close to the atomic unit of time. Attosecond (asec) pulses have been synthesized by broadband coherent extreme ultraviolet (XUV) radiation generated by the interaction of gases or solids with an intense IR fs pulse. Asec pulse trains can be generated when the medium interacts with many-cycle driving IR fs laser fields. In this case, a broadband XUV frequency comb is emitted from the medium. The Fourier synthesis of a part of the comb results in an asec pulse train. Isolated asec pulses are generated when the medium is forced to emit XUV radiation only during few cycles of the driving laser field. This leads to the emission of a broadband quasicontinuum XUV radiation. The Fourier synthesis of the continuum part of the spectrum results in an isolated asec pulse. For the realization of studies of ultrafast dynamics, intense asec pulses are preferable. If the pulses are intense enough to induce a nonlinear process in a target system, they can be used for ultrafast dynamic studies in an XUV pump-probe configuration. Although trains of intense asec pulses are commonly produced nowadays, the generation of intense isolated asec pulses remains a challenge. Here, we review a recently developed approach for the generation of intense asec pulses using high-peak-power many-cycle laser fields. The approach is based on controlling, with asec precession, the response of the atomic dipole to an external many-cycle driving field in such a way as to emit an isolated asec XUV burst. This approach has been implemented by using the inteferometric polarization gating (IPG) technique. The bandwidth of the generated XUV radiation is large enough to enable the synthesis of isolated XUV pulses with durations of a few hundred asec. The technique paves the way for the generation of intense isolated asec pulses, tuneable in duration and frequency, for carrier-envelope phase (CEP) variation studies of many-cycle driving fields, and it offers exciting opportunities for multiphoton XUV-pump-XUV-probe experiments.

Class number

Book number

Paris Tzallas Affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 1527, Heraklion, Crete, GR-711 10, Greece

Dimitrios Charalambidis Affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 1527, Heraklion, Crete, GR-711 10, Greece

Emmanouil Skantzakis Affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 1527, Heraklion, Crete, GR-711 10, Greece

Jann E Kruse Affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 1527, Heraklion, Crete, GR-711 10, Greece

Paris Tzallas Affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 1527, Heraklion, Crete, GR-711 10, Greece

Electronic name

[Book]

Y