Observation of impulsively excited THz acoustical vibrations in PbTe quantum dots

Author

Steinmeyer, G. ; Tudury, G.E. ; Cesar, C.L. ; Cruz, C.H.B. ; Barbosa, L.C. ; Ippen, E.P.

Author_Institution

Res. Lab. of Electron., MIT, Cambridge, MA, USA

fYear

1998

fDate

8-8 May 1998

Firstpage

95

Lastpage

96

Abstract

Summary form only given.We have investigated the femtosecond nonlinear dynamics of PbTe quantum dots grown in a glass matrix and observed impulsive excitation of acoustic resonances of the dots. We have further studied the wavelength dependence of the amplitude, frequency, and damping rate of these phonons. Such data, in conjunction with absorption spectra and femtosecond spectroscopic studies, may provide a new and interesting method for evaluating the size distributions of nanocrystallites.

Keywords

IV-VI semiconductors; interface phonons; lead compounds; optical saturable absorption; semiconductor doped glasses; semiconductor quantum dots; time resolved spectra; vibrational modes; PbTe; absorption spectra; acoustic resonances; femtosecond nonlinear dynamics; glass matrix; impulsive excitation; nanocrystallites; phonon amplitude; phonon damping rate; phonon frequency; quantum dots; size distributions; terahertz acoustical vibrations; wavelength dependence; Dielectrics; Nanoparticles; Plasmons; Pulse amplifiers; Pulse measurements; Quantum dot lasers; Quantum dots; Resonance; Silver; US Department of Transportation;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International

Conference_Location

San Francisco, CA, USA

Print_ISBN

1-55752-541-2

Type

conf

DOI

10.1109/IQEC.1998.680199

Filename

680199