扶手椅边缘矩形石墨烯量子点中多体库仑相互作用的高次谐波产生

IF 1.1 4区物理与天体物理 Q4 NANOSCIENCE & NANOTECHNOLOGY

Journal of Nanophotonics Pub Date : 2022-07-01 DOI:10.1117/1.JNP.16.036001

B. R. Avchyan, A. Ghazaryan, S. S. Israelyan, Kh. V. Sedrakian

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引用次数: 2

摘要

摘要考虑了在这种纳米系统中，通过强相干电磁辐射在扶手椅边缘的石墨烯量子点中产生高次谐波（HHG），同时考虑了电子-电子的集体散射。发展了在动态Hartree–Fock近似下描述平面量子点-激光场非线性相互作用的微观量子理论。在扩展的Hubbard近似中考虑了多体库仑相互作用。所获得的结果表明，纳米结构的横向尺寸、形状和带隙宽度在HHG过程中具有重要意义，这允许提高高次谐波的量子产率和截止光子能量。

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High harmonic generation with many-body Coulomb interaction in rectangular graphene quantum dots of armchair edge

Abstract. High harmonic generation (HHG) in graphene quantum dots of armchair edge by strong coherent electromagnetic radiation taking into account collective electron-electron scattering as well in such nanosystems is considered. The microscopic quantum theory describing the plane quantum dot-laser field nonlinear interaction within the dynamic Hartree–Fock approximation is developed. The many-body Coulomb interaction is considered in the extended Hubbard approximation. The obtained results indicate the significance of the nanostructure lateral size, shape, and bandgap width in HHG process that allows to increase in the quantum yield of high-order harmonics and the cutoff photon energy.

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来源期刊

Journal of Nanophotonics 工程技术-光学

CiteScore

2.60

自引率

6.70%

发文量

审稿时长

3 months

期刊介绍： The Journal of Nanophotonics publishes peer-reviewed papers focusing on the fabrication and application of nanostructures that facilitate the generation, propagation, manipulation, and detection of light from the infrared to the ultraviolet regimes.