Demonstration of Spatial Asymmetric Light Propagation Performance Using Violet Phosphorus Quantum Dots with Tunable Bandgap,Laser & Photonics Reviews

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Demonstration of Spatial Asymmetric Light Propagation Performance Using Violet Phosphorus Quantum Dots with Tunable Bandgap
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-01-10 , DOI: 10.1002/lpor.202301062
Yang Gao ₁ , Cheng Ling ₁ , Danyi Weng ₁ , Guanghao Rui ₁ , Jun He ₂ , Bing Gu _{1,

3}

Affiliation

The spatial self-phase modulation (SSPM) of phosphorus-based nanomaterials is widely studied and developed as passive nonlinear photonic devices for applications in all-optical switches, logic gates, information converters, etc. In this work, violet phosphorus quantum dots (VP QDs) are prepared and characterized in three different solvents, their SSPM is investigated, and their spatial asymmetric light propagation performances are demonstrated. It is shown that VP QDs prepared in three different solvents exhibit different bandgaps, mainly due to the interaction between the dangling bonds of VP QDs and functional groups in different solvents. The SSPM experiment characterizes the nonlinear optical response of solvent-dependent VP QDs. It is found that VP QDs exhibit strong nonlinear optical effect and their nonlinear refractive indexes are comparable to other phosphorus-based 2D materials. Unlike the previously reported principle of spatial asymmetric light propagation (i.e., a cascaded sample based on SSPM composed of nanomaterials with excellent nonlinear refraction and SnS₂ with reverse saturation absorption), the spatial asymmetric light propagation performance based on SSPM is demonstrated using a cascaded sample of VP QDs with significantly different nonlinear optical response prepared in two different solvents.

中文翻译：

使用带隙可调的紫磷量子点演示空间不对称光传播性能

磷基纳米材料的空间自相位调制（SSPM）作为无源非线性光子器件被广泛研究和开发，应用于全光开关、逻辑门、信息转换器等。在这项工作中，紫磷量子点（VP） QD）在三种不同的溶剂中制备和表征，研究了它们的 SSPM，并证明了它们的空间不对称光传播性能。结果表明，在三种不同溶剂中制备的VP量子点表现出不同的带隙，这主要是由于VP量子点的悬挂键与不同溶剂中的官能团之间的相互作用所致。 SSPM 实验表征了溶剂依赖性 VP QD 的非线性光学响应。研究发现VP量子点表现出很强的非线性光学效应，其非线性折射率与其他磷基二维材料相当。与之前报道的空间非对称光传播原理（即由具有优异非线性折射的纳米材料和具有反向饱和吸收的SnS ₂组成的基于SSPM的级联样品）不同，使用级联样品演示了基于SSPM的空间非对称光传播性能在两种不同溶剂中制备的具有显着不同非线性光学响应的 VP QD。

更新日期：2024-01-10

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