In this paper, we demonstrate that for colloidal CdSe/CdS nanoplatelets, a rectangular shape induces emission asymmetry, in terms of both polarization and emission patterns. Polarimetry and emission pattern analyses are combined to provide information on the orientation of the transition dipoles involved in the nanoplatelet emission. It is shown that for rectangular nanoplatelets, the emission is polarized and the emission patterns are anisotropic, whereas they remain nonpolarized and isotropic for square nanoplatelets. This can be appropriately described by the dielectric antenna effect induced by the elongated shape of the rectangular platelet.

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中文翻译：

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胶体CdSe / CdS纳米片发射不对称时形状伸长的后果

在本文中，我们证明了对于胶体CdSe / CdS纳米片，矩形形状会在极化和发射模式方面引起发射不对称。极化分析和发射模式分析相结合，以提供有关纳米血小板发射中涉及的跃迁偶极子方向的信息。结果表明，对于矩形纳米片，发射是极化的并且发射模式是各向异性的，而对于方形纳米片，它们仍然是非极化的和各向同性的。这可以通过矩形薄片的细长形状引起的电介质天线效应来适当地描述。

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