1. Sachan M, Majetich S. DARPA Meta-Materials Program Report. 2005.
2. Liu S. DARPA Meta-Materials Program Report. 2005.
3. Optical metamaterials: fundamentals and applications;Cai,2010
4. Negative refraction makes a perfect lens;Pendry;Phys Rev Lett,2000
5. Negative refraction;Pendry;Contemp Phys,2004