Diffraction-free optical beam propagation with near-zero phase variation in extremely anisotropic metamaterials

作者：Sun Lei; Yang Xiaodong^*; Wang Wei; Gao Jie

来源：Journal of Optics, 2015, 17(3): 035101.

DOI：10.1088/2040-8978/17/3/035101

• multilayer metamaterials
• extreme anisotropy
• diffraction-free near-zero phase variation propagation
• optical nonlocality

Extremely anisotropic metal-dielectric multilayer metamaterials are designed to have the effective permittivity tensor of a transverse component (parallel to the interfaces of the multilayer) with zero real part and a longitudinal component (normal to the interfaces of the multilayer) with ultra-large imaginary part at the same wavelength, including the optical nonlocality analysis based on the transfer-matrix method. The diffraction-free deep-subwavelength optical beam propagation with near-zero phase variation in the designed multilayer stack due to the near-flat iso-frequency contour is demonstrated and analyzed, including the effects of the multilayer period and the material loss.

• 出版日期2015-3