Acoustic far-field focusing effect for two-dimensional graded negative refractive-index sonic crystals

High efficiency of graded index photonic crystal as an input coupler

(2009) Atilla Ozgur Cakmak et al.   JOURNAL OF APPLIED PHYSICS

Graded negative index lens with designable focal length by phononic crystal

(2009) Ke Deng et al.   JOURNAL OF PHYSICS D-APPLIED PHYSICS

Gradient-index phononic crystals

(2009) Sz-Chin Steven Lin et al.   PHYSICAL REVIEW B

The focusing effect of graded index photonic crystals

(2008) H. Kurt et al.   APPLIED PHYSICS LETTERS

Graded photonic crystals curve the flow of light: An experimental demonstration by the mirage effect

(2008) Eric Akmansoy et al.   APPLIED PHYSICS LETTERS

Graded negative index lens by photonic crystals

(2008) Qi Wu et al.   OPTICS EXPRESS