TY - RPRT TI - Unidirectional Spectral Singularities AU - Ramezani, Hamidreza AU - Li, Hao-Kun AU - Wang, Yuan AU - Zhang, Xiang PY - 2014 DO - 10.1103/physrevlett.113.263905 UR - https://www.osti.gov/biblio/1179991 ID - 1179991 ER -