Polarization insensitive, broadband terahertz metamaterial absorber Grant, James ; Ma, Yong ; Saha, Shimul ; Khalid, Ata ; Cumming, David R. S. Abstract Publication: Optics Letters Pub Date: September 2011 DOI: 10.1364/OL.36.003476 Bibcode: 2011OptL...36.3476G