Work

Phase-dependent interference fringes in the wavelength scaling of harmonic efficiency

Year: 2014

Type: article

Abstract: We describe phase-dependent wavelength scaling of high-order-harmonic generation efficiency driven by ultrashort laser fields in the midinfrared. We employ both numerical solution of the time-dependent Schr\"odinger equation and the strong field approximation to analyze the fine-scale oscillations in the harmonic yield in the context of channel-closing effects. We show, by varying the carrier-envelope phase, that the amplitude of these oscillations depends strongly on the number of returning electron trajectories. Furthermore, the peak positions of the oscillations vary significantly as a function of the carrier-envelope phase. Owing to its practical applications, we also study the wavelength dependence of harmonic yield in the ``single-cycle'' limit, and observe a smooth variation in the wavelength scaling originating from the vanishing fine-scale oscillations.

Source: Physical Review A

DOI: 10.1103/physreva.89.055801

Authors: I. Yavuz, E. A. Bleda, Z. Altun, T. Topcu

Institutions: University of California, Los Angeles, Marmara University, Istanbul Arel University, University of Nevada, Reno

Language: English

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, Marmara Üniversitesi

Award: Feasibility of Quantum Information Processing with Neutral Divalent Atoms: Decoherence-Free (Magic) Trapping, Rydberg Gates and Rydberg Blockade