2014/11/30 by Alison McDonald, Gail McConnell, David Cox +3
Biochemistry, Genetics and Molecular Biology · Engineering · Physics and Astronomy · #Advanced Fluorescence Microscopy Techniques #Aperture (computer memory) #Collimated light #Diffraction #Focal length #Laser #Lens (geology) #Materials science #Micrometer #Near-Field Optical Microscopy #Optics #Orbital Angular Momentum in Optics #Parabolic reflector #Physics #Ptychography #RADIUS #physics.optics
paper · pdf · doi:10.1364/oe.23.002375
7 pages, 5 figures. Accepted to Optics Express
arxiv created 2015/01/13 · openalex publication_date 2015/01/28 · arxiv updated 2015/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We report on the fabrication and diffraction-limited characterization of parabolic focusing micromirrors. Sub-micron beam waists are measured for mirrors with 10-μm radius aperture and measured fixed focal lengths in the range from 24 μm to 36 μm. Optical characterization of the 3D intensity in the near-field produced when the device is illuminated with collimated light is performed using a modified confocal microscope. Results are compared directly with angular spectrum simulations, yielding strong agreement between experiment and theory, and identifying the competition between diffraction and focusing in the regime probed.