Focusing of millimeter-wave radiation beyond the Abbe barrier

Pimenov, A.; Loidl, A.
November 2003
Applied Physics Letters;11/17/2003, Vol. 83 Issue 20, p4122
Academic Journal
A hemispherical focusing system for millimeter waves is presented. Focusing of the beam to a spot of ∼0.3λ was obtained in the frequency range from 100 to 200 GHz. Compared to the scanning near-field optical spectroscopy, the system allows simultaneous imaging of extensive subwavelength objects. As an example, a double slit of size d=1 mm was clearly resolved using a radiation with a wavelength λ=2 mm. Using future optically dense lenses, a resolution of the order λ/100 seems to become possible. © 2003 American Institute of Physics.


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