Plasmonic (thermal) electromagnetically induced transparency in metallic nanoparticle–quantum dot hybrid systems

• Published in: Nanotechnology Vol. 20; no. 36; p. 365401
• Main Authors: Sadeghi, S M, Deng, L, Li, X, Huang, W-P
• Format: Journal Article
• Language: English
• Published: England IOP Publishing 09.09.2009
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/0957-4484/20/36/365401

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.