Diffraction-free subwavelength-beam optics

Details Diffraction-free subwavelength-beam optics Diffraction-free subwavelength-beam optics

2003-09-17

arxiv.org/abs/physics/0309078v1

Physics

Optics

4 figures

Scientific paper

Diffraction is a fundamental property of light propagation. Owing to this phenomenon,light diffracts out in all directions when it passes through a subwavelength slit.This imposes a fundamental limit on the transverse size of a light beam at a given distance from the aperture. We show that a subwavelength-sized beam propagating without diffractive broadening can be produced in free space by the constructive interference of multiple beams of a Fresnel source of the respective high-refraction-index waveguide. Moreover, it is shown that such a source can be constructed not only for continuous waves, but also for ultra-short (near single-cycle) pulses. The results theoretically demonstrate the feasibility of completely diffraction-free subwavelength-beam optics, for both continuous waves and ultra-short pulses. The approach extends operation of the near-field subwavelength-beam optics, such as near-field scanning optical microscopy and spectroscopy,to the "not-too-distant" field regime (0.5 to about 10 wavelengths).

Affiliated with

Also associated with

No associations

Rating

Diffraction-free subwavelength-beam optics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Diffraction-free subwavelength-beam optics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffraction-free subwavelength-beam optics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-137882