High Harmonic Generation with Many-Particle Coulomb Interaction in Graphene Quantum Dot

IF 1 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
Kh. V. Sedrakian, A. G. Ghazaryan, B. R. Avchyan, G. A. Musayelyan, T. M. Markosyan
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引用次数: 0

Abstract

The multiphoton excitation and high harmonic generation (HHG) processes are considered using the microscopic quantum theory of nonlinear interaction of strong coherent electromagnetic (EM) radiation with rectangular graphene quantum dot (GQD) with zigzag edges and more than 80 atoms. The dynamic Hartree–Fock approximation has been used to consider the quantum dot-laser field nonlinear interaction at the nonadiabatic multiphoton excitation regime. The many-body Coulomb interaction is described in the extended Hubbard approximation. By numerical results, we show the significance of the rectangular GQD lateral size, shape, and EM wavefield orientation in rectangular GQD of the zigzag edge in the HHG process allowing for increasing the cutoff photon energy and the quantum yield of higher harmonics.

Abstract Image

石墨烯量子点中多粒子库仑相互作用的高谐波产生
利用强相干电磁(EM)辐射与80个以上原子的矩形石墨烯量子点(GQD)非线性相互作用的微观量子理论,研究了多光子激发和高谐波产生过程。采用动态Hartree-Fock近似来考虑非绝热多光子激励下量子点与激光场的非线性相互作用。多体库仑相互作用用扩展的哈伯德近似来描述。数值结果表明,在HHG过程中,矩形GQD的横向尺寸、形状和电磁波场方向对于提高截止光子能量和高次谐波的量子产率具有重要意义。
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来源期刊
CiteScore
1.90
自引率
9.10%
发文量
130
审稿时长
3-6 weeks
期刊介绍: Journal of Experimental and Theoretical Physics is one of the most influential physics research journals. Originally based on Russia, this international journal now welcomes manuscripts from all countries in the English or Russian language. It publishes original papers on fundamental theoretical and experimental research in all fields of physics: from solids and liquids to elementary particles and astrophysics.
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