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Debus C, Lieb MA, Drechsler A, et al. Probing highly confined optical fields in the focal region of a high NA parabolic mirror with subwavelength spatial resolution. J Microsc. 2003;210:203-8doi: 10.1046/j.1365-2818.2003.01091.x.
Debus, C., Lieb, M. A., Drechsler, A., & Meixner, A. J. (2003). Probing highly confined optical fields in the focal region of a high NA parabolic mirror with subwavelength spatial resolution. Journal of microscopy, 210203-8. https://doi.org/10.1046/j.1365-2818.2003.01091.x
Debus, C, et al. "Probing highly confined optical fields in the focal region of a high NA parabolic mirror with subwavelength spatial resolution." Journal of microscopy vol. 210 (2003): 203-8. doi: https://doi.org/10.1046/j.1365-2818.2003.01091.x
Debus C, Lieb MA, Drechsler A, Meixner AJ. Probing highly confined optical fields in the focal region of a high NA parabolic mirror with subwavelength spatial resolution. J Microsc. 2003 Jun;210:203-8. doi: 10.1046/j.1365-2818.2003.01091.x. PMID: 12787085.
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J Microsc. 2003 Jun;210:203-8. doi: 10.1046/j.1365-2818.2003.01091.x.

Probing highly confined optical fields in the focal region of a high NA parabolic mirror with subwavelength spatial resolution.

Journal of microscopy

C Debus, M A Lieb, A Drechsler, A J Meixner

Affiliations

  1. Universität Siegen, Physikalische Chemie, 57068 Siegen, Germany.

PMID: 12787085 DOI: 10.1046/j.1365-2818.2003.01091.x

Abstract

Parabolic mirrors with a high numerical aperture can be conveniently used to produce highly confined optical fields in the focal region. Furthermore, these fields can have interesting polarization behaviour due to the high numerical aperture. In particular, if the mirror is illuminated with a size matched radially polarized or azimuthally polarized doughnut mode, the electric field has in the focal region almost exclusively a longitudinal or a transverse polarization component. Such field distributions are interesting for applications in confocal or near-field optical microscopy. Here we present experimental results where we have probed some of these field distributions by raster scanning a fine gold tip in nanometer steps through the focal region and detecting the scattered light intensity. The measured intensity patterns are compared with corresponding vector-field calculations.

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