Dipole-active vibrations confined in InP quantum dots

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Vasilevskiy, MI (Author) Other; Rolo, AG (Author) Other; Gaponik, NP (Author) Other; Talapin, DV (Author) Other; Rogach, AL (Author) Other; Gomes, MJM (Author) Other

Journal

Title: Physica B: Condensed Matter

Vol. 316

Pages: 452-454

ISSN: 0921-4526

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Other information

Authenticus ID: P-000-PKJ

DOI: 10.1016/s0921-4526(02)00541-0

Abstract (EN): Dipole-active optical phonons confined in nearly spherical InP quantum dots (QDs) were studied theoretically and experimentally. Spatial quantization of the phonon modes in an InP QD was considered theoretically by solving the coupled continuous equation of motion and Poisson equation. It is shown that, when the Frohlich frequency falls into the gap between the bulk LO and TO phonon bands, a gap mode appears, which contains most of the dipole oscillator strength. Accordingly, the shape of the far-infrared (FIR) absorption spectra does not change with the QD size. This conclusion has been confirmed by our experimental FIR spectroscopy studies on films of InP QDs prepared by colloidal synthesis.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3