Surface Normal Lasing from CdSe Nanoplatelets Coupled to Aluminum Plasmonic Nanoparticle Lattices,The Journal of Physical Chemistry C

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Surface Normal Lasing from CdSe Nanoplatelets Coupled to Aluminum Plasmonic Nanoparticle Lattices
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-09-02 , DOI: 10.1021/acs.jpcc.1c05662
Nicolas E. Watkins , Jun Guan , Benjamin T. Diroll ₁ , Kali R. Williams , Richard D. Schaller ₁ , Teri W. Odom

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This paper describes low-threshold lasing from colloidal CdSe nanoplatelets (NPLs) coated on two-dimensional plasmonic cavities composed of aluminum nanoparticles (NPs). We designed the NP lattice to support a spectrally narrow surface lattice resonance whose wavelength overlapped with the amplified spontaneous emission (ASE) from CdSe NPLs. Al NP lattices coated with CdSe NPL thin films were optically pumped and exhibited lasing in the surface normal direction with low angular divergence, narrow spectral line width (∼1 nm), and a threshold of ∼200 μJ/cm². Nonlinear light emission characteristics were found to depend on the thickness of the CdSe NPL film. A minimum thickness of 150 nm was required to observe SLR-mediated lasing, but thinner films exhibited only photoluminescence. Films above 150 nm exhibited both in-plane waveguided ASE from the CdSe NPL film and lasing action from the Al NP lattice.

中文翻译：

CdSe 纳米片耦合到铝等离子体纳米颗粒晶格的表面法向激光

本文描述了从涂在由铝纳米粒子 (NPs) 组成的二维等离子体腔上的胶体 CdSe 纳米片 (NPL) 的低阈值激光。我们设计了 NP 晶格以支持光谱窄的表面晶格共振，其波长与来自 CdSe NPL 的放大自发辐射 (ASE) 重叠。涂有 CdSe NPL 薄膜的 Al NP 晶格被光学泵浦，并在表面法线方向显示出激光，角发散角小，谱线宽度窄（~1 nm），阈值为~200 μJ/cm ². 发现非线性发光特性取决于 CdSe NPL 膜的厚度。观察 SLR 介导的激光所需的最小厚度为 150 nm，但较薄的薄膜仅表现出光致发光。150 nm 以上的薄膜表现出来自 CdSe NPL 薄膜的面内波导 ASE 和来自 Al NP 晶格的激光作用。

更新日期：2021-09-16

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