Title :
Raman shifts of CdSe quantum dots in glass matrices
Author :
Young-nam Hwang ; Sanghun Shin ; Hong Lee Park ; Seung-Han Park ; Ung Kim ; Hong Sik Jeong ; Eun-Joo Shin ; Dongho Kim
Author_Institution :
Dept. of Phys., Yonsei Univ., Seoul, South Korea
Abstract :
Summary form only given. Recently, the vibrational states of quantum dots have been intensively studied as well as the optical properties due to carrier confinement. In this report, a modified expression is proposed, which can explain the observed size- and glass-dependent phonon energies of CdSe quantum dots in B/sub 2/O/sub 3/-SiO/sub 2/ and SiO/sub 2/ glasses and the previously reported ones in a GeO/sub 2/ glass. We obtain the phonon frequency w(R) of microcrystal with radius to R considering phonon-frequency shifts due to phonon dispersion and lattice contraction.
Keywords :
II-VI semiconductors; Raman spectra; cadmium compounds; optical glass; phonons; semiconductor quantum dots; spectral line shift; vibrational states; B/sub 2/O/sub 3/-SiO/sub 2/; CdSe quantum dots; GeO/sub 2/ glass; Raman shifts; SiO/sub 2/ glasses; carrier confinement; glass matrices; glass-dependent phonon energies; lattice contraction; microcrystal; optical properties; phonon dispersion; phonon frequency; phonon-frequency shifts; quantum dots; vibrational states; Frequency; Glass; Lattices; Nanocrystals; Phonons; Quantum dots; Solids; Temperature measurement; Thermal expansion; US Department of Transportation;
Conference_Titel :
Lasers and Electro-Optics, 1996. CLEO '96., Summaries of papers presented at the Conference on
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-443-2
