Sadeghi S M, Deng L, Li X, Huang W-P
Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899, USA.
Nanotechnology. 2009 Sep 9;20(36):365401. doi: 10.1088/0957-4484/20/36/365401. Epub 2009 Aug 18.
We study the application of an infrared laser to control heat dissipation in a metallic nanoparticle when it is in the vicinity of a semiconductor quantum dot. The infrared laser is considered to be near-resonant with two of the conduction states of the quantum dot, coherently mixing them together. Via exciton-plasmon coupling, this process normalizes the internal field of the metallic nanoparticle, forming a plasmonic (thermal) electromagnetically induced transparency. When this process happens the metallic nanoparticle becomes nearly completely non-dissipative around its plasmon frequency, while it remains strongly dissipative at other frequencies. We show that, by adjusting the intensity of the infrared laser, one can control the transparency window width and optical Stark shift associated with such a process.
我们研究了红外激光在金属纳米颗粒靠近半导体量子点时控制其热耗散的应用。红外激光被认为与量子点的两个导带状态近共振，将它们相干地混合在一起。通过激子 - 等离子体耦合，这一过程使金属纳米颗粒的内部场归一化，形成等离子体（热）电磁诱导透明。当这个过程发生时，金属纳米颗粒在其等离子体频率附近几乎完全无耗散，而在其他频率下仍有很强的耗散。我们表明，通过调节红外激光的强度，可以控制与该过程相关的透明窗口宽度和光学斯塔克位移。
