Ultrafast dynamics via coherent exciton-plasmon coupling in quantum dot-metallic nanoparticle systems

S. M. Sadeghi

doi:10.1117/12.2188447

28 August 2015 Ultrafast dynamics via coherent exciton-plasmon coupling in quantum dot-metallic nanoparticle systems

S. M. Sadeghi

Proceedings Volume 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII; 95470G (2015) https://doi.org/10.1117/12.2188447
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

When a quantum dot is in the vicinity of a metallic nanoparticle and is driven by a laser field, quantum coherence can renormalize the plasmon field of the metallic nanoparticle, forming a coherent-plasmonic field (CP field). We demonstrate that for a given form of variation of this laser field with time, the CP field around the metallic nanoparticle can offer different forms of ultrafast field dynamics, depending on the location. In other words, we show the coherent exciton-plasmon coupling in such a system allows it to act as coherent nanoantenna capable of generation position-dependent coherent-plasmonic dynamics, designating each location around the metallic nanoparticle with characteristic time-position coordinates. These investigations are carried out by demonstrating that the coherent dynamics responsible for these effects can persist in the presence of the ultrafast polarization dephasing of the quantum dots. This highlights the prospect of generation and preservation of quantum coherence effects in hybrid quantum dot-metallic nanoparticle systems at elevated temperatures. Therefore, even when the decoherence times of the quantum dots are of the order of several hundreds of femtoseconds, as observed at room temperature, such coherent dynamics can remain quite distinct and observable.

Conference Presentation

Citation Download Citation

S. M. Sadeghi "Ultrafast dynamics via coherent exciton-plasmon coupling in quantum dot-metallic nanoparticle systems", Proc. SPIE 9547, Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, 95470G (28 August 2015); https://doi.org/10.1117/12.2188447

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available