| Autor: |
Haifeng Wang, Luping Shi, Gaoqiang Yuan, Miao, X. S., Weilian Tan, Towchong Chong |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 10/23/2006, Vol. 89 Issue 17, p171102, 3p, 1 Black and White Photograph, 1 Diagram, 2 Graphs |
| Abstrakt: |
A light spot that is smaller than a half wavelength will subsequently diverge in all directions. In this letter, the authors model a subwavelength (0.42λ) super-resolution light beam which propagates over a long distance without any divergence. This can be achieved by placing a multibelt pure-phase-type binary optical element on the lens pupil. The authors also report a useful approach for designing the optical element, based on vector diffraction theory, which can be used in paraxial and nonparaxial focusing and imaging systems. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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