Single quantum dot controls a plasmonic cavity’s scattering and anisotropy
Abstract
We experimentally demonstrate that a single semiconductor quantum dot placed in close proximity to a plasmonic cavity (i.e., a spherical metallic nanoparticle) can be used to control the scattering spectrum and anisotropy of the latter. The scattering spectrum of the hybrid structure features a Fano resonance mediated by single photon absorption/scattering. This result is highly counterintuitive because the scattering cross sections of these two nanoparticles differ by four orders of magnitude. Our work represents a critical step toward realizing quantum plasmonic nanostructures that are capable of producing scattered light, which, depending on its polarization state, obeys either quantum or classical statistics. Furthermore, our work enables a hybrid orientation sensor unaffected by photobleaching of quantum dots.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 08, 2015
- Source ID
- 10.1073/pnas.1508642112
Entities
People
- Gennady Shvets
- Jin‐Wei Shi
- Liuyang Sun
- Seung-cheol Yang
- Stephan Link
- Thomas Hartsfield
- Tzuhsuan Ma
- Wei-Shun Chang
- Xiaoqin Li
Organizations
- Army Research Office
- Beijing Normal University
- National Science Foundation
- Office of Naval Research
- Rice University
- Robert A. Welch Foundation
- United States Army Research Laboratory
- University of Texas at Austin