Improved sample characterization in terahertz reflection imaging and spectroscopy Huang, Shengyang ; Ashworth, Philip C. ; Kan, Kanis W. ; Chen, Yang ; Wallace, Vincent P. ; Zhang, Yuan-ting ; Pickwell-MacPherson, Emma Abstract Publication: Optics Express Pub Date: March 2009 DOI: 10.1364/OE.17.003848 Bibcode: 2009OExpr..17.3848H