@article{33442, keywords = {light absorption, nanoparticles, Energy gap, scanning tunneling microscopy, Absorption measurements, Amorphous nanoparticles, Burstein-Moss shift, Crystalline nanoparticles, Free carrier density, Localized surface plasmon resonance, Plasmonic properties, Scanning tunneling spectroscopy, Crystalline materials, Plasmons, Surface plasmon resonance}, author = {M.J Polking and P.K Jain and Y Bekenstein and U Banin and O Millo and Ramamoorthy Ramesh and A.P Alivisatos}, title = {Controlling localized surface plasmon resonances in GeTe nanoparticles using an amorphous-to-crystalline phase transition}, abstract = {Infrared absorption measurements of amorphous and crystalline nanoparticles of GeTe reveal a localized surface plasmon resonance (LSPR) mode in the crystalline phase that is absent in the amorphous phase. The LSPR mode emerges upon crystallization of amorphous nanoparticles. The contrasting plasmonic properties are elucidated with scanning tunneling spectroscopy measurements indicating a Burstein-Moss shift of the band gap in the crystalline phase and a finite density of electronic states throughout the band gap in the amorphous phase that limits the effective free carrier density. © 2013 American Physical Society.}, year = {2013}, journal = {Physical Review Letters}, volume = {111}, number = {3}, issn = {00319007}, doi = {10.1103/PhysRevLett.111.037401}, note = {cited By 34}, language = {eng}, }