2009/12/16 by Manoj Kumar, Kumar, Manoj, Rajesh Kumar +5
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Other Condensed Matter (cond-mat.other) #Photonic and Optical Devices #Quantum Dots Synthesis And Properties #Silicon Nanostructures and Photoluminescence #cond-mat.mes-hall #cond-mat.other
paper · pdf · doi:10.48550/arxiv.0912.3047
15 Pages, 3 figures and 1 Table. \LaTeX file
arxiv created 2009/12/16 · openalex publication_date 2009/12/16 · arxiv updated 2010/01/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Origin of room temperature visible photoluminescence (PL) from defect free germanium (Ge) nanoparticles have been discussed here. The Ge nanoparticles produced by laser-induced etching technique show broad visible PL around 2.0 - 2.2 eV at room temperature. Size dependent PL peak shift in Ge nanoparticles has been explained in terms of quantum confinement. Theoretical calculations of radiative lifetime using oscillator strength, which is closely related to the size of the nanostructures, suggests that the PL is originating from a radiative recombination process in quantum confined Ge nanostructures.