Quantum Size Effects in Ge Microcrystals Embedded in SiO2 Thin Films
- 1 August 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (8A) , L1464
- https://doi.org/10.1143/jjap.28.l1464
Abstract
By applying an rf co-sputtering technique, we have succeeded in producing Ge microcrystals in SiO2 thin films for which direct characterization by transmission electron microscopy is possible. As the size of the Ge microcrystals decreased from 6.5 to 2.7 nm, the optical extinction (absorption) spectra changed drastically. The structures corresponding to interband transitions in bulk Ge disappeared, and the onset of extinction shifted to higher energies. These spectral changes seem to arise from the three-dimensional confinement of electrons and holes in the microcrystals.Keywords
This publication has 12 references indexed in Scilit:
- Effect of Size Confinement on the Electronic States of CdS Cluster in a Germanium Oxide MatrixJapanese Journal of Applied Physics, 1989
- Temperature Dependence of Photoacoustic and Photoluminescence Signals for CdSxSe1-x MicrocrystalsJapanese Journal of Applied Physics, 1989
- Absorption saturation in commercial and quantum-confine CdSexS_1−x-doped glassesJournal of the Optical Society of America B, 1988
- Quantum size effects in optical properties of CdS-glass compositesPhysical Review B, 1988
- Size‐Quantized Excitons in Microcrystals of Cuprous Halides Embedded in Alkali‐Halide MatricesPhysica Status Solidi (b), 1988
- Study on the Size and Shape of CuCl Microcrystals Embedded in Alkali‐Chloride Matrices and Their Correlation with Exciton ConfinementPhysica Status Solidi (b), 1988
- Very large optical nonlinearity of semiconductor microcrystallitesPhysical Review B, 1988
- Quantum confinement effects of semiconducting microcrystallites in glassJournal of Applied Physics, 1987
- Quantum size effects in simple colored glassPhysical Review B, 1985
- Critical Points and Ultraviolet Reflectivity of SemiconductorsPhysical Review Letters, 1962