Author
Listed:
- Christos Grivas
(School of Physics and Astronomy, University of Southampton)
- Chunyong Li
(School of Physics and Astronomy, University of Southampton)
- Peristera Andreakou
(School of Physics and Astronomy, University of Southampton)
- Pengfei Wang
(Optoelectronics Research Centre, University of Southampton)
- Ming Ding
(Optoelectronics Research Centre, University of Southampton)
- Gilberto Brambilla
(Optoelectronics Research Centre, University of Southampton)
- Liberato Manna
(Istituto Italiano di Tecnologia
Kavli Institute of Nanoscience, Delft University of Technology)
- Pavlos Lagoudakis
(School of Physics and Astronomy, University of Southampton)
Abstract
Whispering-gallery-mode resonators have been extensively used in conjunction with different materials for the development of a variety of photonic devices. Among the latter, hybrid structures, consisting of dielectric microspheres and colloidal core/shell semiconductor nanocrystals as gain media, have attracted interest for the development of microlasers and studies of cavity quantum electrodynamic effects. Here we demonstrate single-exciton, single-mode, spectrally tuned lasing from ensembles of optical antenna-designed, colloidal core/shell CdSe/CdS quantum rods deposited on silica microspheres. We obtain single-exciton emission by capitalizing on the band structure of the specific core/shell architecture that strongly localizes holes in the core, and the two-dimensional quantum confinement of electrons across the elongated shell. This creates a type-II conduction band alignment driven by coulombic repulsion that eliminates non-radiative multi-exciton Auger recombination processes, thereby inducing a large exciton–bi-exciton energy shift. Their ultra-low thresholds and single-mode, single-exciton emission make these hybrid lasers appealing for various applications, including quantum information processing.
Suggested Citation
Christos Grivas & Chunyong Li & Peristera Andreakou & Pengfei Wang & Ming Ding & Gilberto Brambilla & Liberato Manna & Pavlos Lagoudakis, 2013.
"Single-mode tunable laser emission in the single-exciton regime from colloidal nanocrystals,"
Nature Communications, Nature, vol. 4(1), pages 1-9, December.
Handle:
RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3376
DOI: 10.1038/ncomms3376
Download full text from publisher
Corrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3376. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
We have no bibliographic references for this item. You can help adding them by using this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .
Please note that corrections may take a couple of weeks to filter through
the various RePEc services.