Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments
Physics Department, Technion-Israel Institute of Technology, 32000, Haifa, Israel
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Accepted: 21 June 2017
Published online: 29 June 2017
The appearance of a Nano-jet in the microsphere optical experiments is analyzed by relating this effect to non-diffracting Bessel beams. By inserting a circular aperture with a radius of subwavelength dimension in the EM waist, and sending the transmitted light into a confocal microscope, the EM oscillations by the different Bessel beams are avoided. On this constant EM field evanescent waves are superposed. While this effect improves the optical-depth of the imaging process, the object fine-structures are obtained, from the modulation of the EM fields by the evanescent waves. The use of a combination of the microsphere optical system with an interferometer for phase contrast measurements is described.
Key words: Microsphere / Nano-jet / Bessel beams / Super-resolution / Evanescent waves / Phase contrast
© The Author(s); licensee Springer on behalf of EPJ., 2017