English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Unipolar and quasi-unipolar half-cycle pulses having nonzero electric pulsearea are a limit of pulse shortening in a given spectral range. In spite of thefact that existence of such pulses was considered by Jackson (1962), V.L.Ginzburg (1960-s), Bullough and Ahmad (1971) as well as Bessonov (1981), thepossibility of their existence and propagation in space remained questionablefor many years. Only within the past decades both the possibility of unipolarpulse existence and their propagation dynamics were shown and analyzed indetail theoretically and experimentally. So far such pulses became a subject ofactive research due to their potential in the ultra-fast optics and study ofnew regimes of light-matter interactions with subcycle resolution. Here, weshow the possibility of the effective ultrafast control of the levelpopulations in quantum well nanostructures by the half-cycle unipolarattosecond light pulses in comparison to the single-cycle ones. It is shownthat the population dynamics can be determined by the electric pulse areadivided to its characteristic "scale" determined by the quantum well width. Theselective excitation of quantum states and the feasibility of the populationinversion by the subcycle unipolar pulses is demonstrated.

Excitation and control of quantum well nanostructures by unipolar half-cycle attosecond pulses