Plasmon-enhanced second harmonic generation in semiconductor quantum dots close to metal nanoparticles
Plasmon-enhanced second harmonic generation in semiconductor quantum dots close to metal nanoparticles
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DOI：
10.4279/pip.030002
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发表时间：
2011-01-01
影响因子：
0.9
通讯作者：
Bragas, Andrea V.
中科院分区：
文献类型：
--
作者：
Jais, Pablo M.;von Bilderling, Catalina;Bragas, Andrea V.
我们报道了当非中心对称半导体硫化镉量子点与孤立的银纳米粒子紧密接触时，其光学二次谐波信号的增强。强度增强约为1000。我们还发现，当入射激光频率omega调到2 omga处的银等离激元的光谱位置时，增强作用增强，证明了银纳米粒子对非线性辐射的修正。
We report the enhancement of the optical second harmonic signal in non-centrosymmetric semiconductor CdS quantum dots, when they are placed in close contact with isolated silver nanoparticles. The intensity enhancement is about 1000. We also show that the enhancement increases when the incoming laser frequency omega is tuned toward the spectral position of the silver plasmon at 2 omega, proving that the silver nanoparticle modifies the nonlinear emission.