Proposal for a broadband THz refractive-index sensor based on quantum-cascade laser arrays Zhao, Le ; Khanal, Sudeep ; Wu, Chongzhao ; Kumar, Sushil Abstract Publication: Optics Express Pub Date: February 2015 DOI: 10.1364/OE.23.004751 Bibcode: 2015OExpr..23.4751Z