Beam shaping based on intermediate zone diffraction of a micro-aperture

• Autorzy: Zeng D. , Sun Z.
• Języki publikacji: EN

Abstrakty

EN

We analyze optical diffraction of a micro-aperture (slit or hole) in a metal screen in the intermediate zone and report its application for beam focusing and collimating in micro-optics. Both finite-difference time-domain simulations and Rayleigh-Sommerfeld diffraction formula were applied to calculate the intermediate-zone diffraction patterns. It is shown that, by controlling the aperture size, the focal length and depth can be adjusted in a very wide range, from subwavelength to tens of wavelengths, while the focal width maintains in an order of wavelength.

Słowa kluczowe

EN

aperture; diffraction; beam shaping

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2008
• Tom: Vol. 38, nr 3
• Strony: 511--517
• Opis fizyczny: Bibliogr. 15 poz.,

Twórcy

autor

Zeng D.

autor

Sun Z.

• Department of Physics, Xiamen University, Xiamen 361005, China

Bibliografia

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