介电约束和尺寸效应对CdSe纳米片非线性吸收的影响

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-05-08 DOI:10.1016/j.optcom.2025.131882

M.K. Manvelyan , M.A. Mkrtchyan , Kh.S. Khachatryan , H.A. Sarkisyan

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引用次数: 0

摘要

在本研究中，考虑到纳米血小板与周围介质介电常数不匹配导致的极化效应的影响，研究了胶体CdSe纳米血小板的线性和非线性光学效应。特别地，确定了导带带内跃迁的线性和非线性光学吸收系数。非线性效应明显弱于线性效应，吸收峰随介电常数的差异而发生位移。在考虑的CdSe纳米血小板体系中，还研究了光谐波产生的可能性。揭示了纳米血小板单层数对上述参数性质的影响。

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Influence of dielectric confinement and size effect on nonlinear absorption in CdSe nanoplatelets

In this study, linear and nonlinear optical effects on colloidal CdSe nanoplatelets were investigated, considering the influence of the polarization effects resulting from a mismatch between the dielectric constants of the nanoplatelet and the surrounding medium. In particular, linear and nonlinear optical absorption coefficients for intraband transitions in the conduction band are determined. Nonlinear effects are shown to be significantly weaker than linear effects, and the shift of absorption peaks in dependence on differences between dielectric constants was revealed. The possibility of optical harmonic generation was also studied in the considered CdSe nanoplatelets system. The impact of the number of nanoplatelet monolayers on the character of the above-mentioned parameters has been revealed.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.