Microcavity Lasing from Block Peptide Hierarchically Assembled Quantum Dot Spherical Resonators

Jennifer N. Cha,†# Michael H. Bartl,†§# Michael S. Wong,† Alois Popitsch,§ Timothy J. Deming,†‡ and Galen D. Stucky*†‡
Department of Chemistry & Biochemistry and Materials Department, University of California, Santa Barbara, California 93106, and Institute of ChemistryInorganic Chemistry, Karl-Franzens-University of Graz, A-8010 Graz, Austria
Nano Letters, 2003, 3 (7), pp 907–911
DOI: 10.1021/nl034206k
Publication Date (Web): May 30, 2003
Copyright © 2003 American Chemical Society
†

 Department of Chemistry & Biochemistry, U. C., Santa Barbara.

,

 Present address:  D83 Hildebrand Hall, Department of Chemistry, University of California, Berkeley, CA, 94720.

,
#

 These authors contributed equally to this work.

,
§

 Karl-Franzens-University of Graz.

,

 Present address:  Department of Chemical Engineering, Rice University, Houston, TX 77005.

,
‡

 Materials Department, U. C., Santa Barbara.

,
*

 Corresponding author. E-mail:  stucky@chem.ucsb.edu.

Abstract

Abstract Image

Quantum dot (QD) resonators for microcavity lasing applications were successfully synthesized by a single system diblock copolypeptide mediated process. Using specifically tailored block peptides and nanoparticles, we present here the cooperative assembly of cadmium selenide (CdSe) QDs and silica nanoparticles into 3-dimensional microcavities with a high QD volume fraction. These hollow QD microspheres are a perfect combination of both quantum and optical confinement, in which the electronic states of the 3-dimensional confined semiconductor nanocrystals are coupled to the photonic states of the spherical microcavity. We show that the specific interaction between the mode properties of the cavity with the emission of its QD building blocks leads to room-temperature microcavity lasing without the use of additional mirrors, substrate spheres, or gratings.

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History

  • Published In Issue July 09, 2003
  • Received April 7, 2003
    Revised Manuscript Received May 7, 2003

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