Isotropic diffraction-limited focusing using a single objective lens

Emeric Mudry 1 Eric Le Moal 1 P. Ferrand 2 Patrick Chaumet 1 Anne Sentenac 1
1 SEMO - SEMO
FRESNEL - Institut FRESNEL
2 MOSAIC - MOSAIC
FRESNEL - Institut FRESNEL
Abstract : Focusing a light beam through a lens produces an anisotropic spot elongated along the optical axis, because the light comes from only one side of the focal point. Using the time-reversal concept, we show that isotropic focusing can be realized by placing a mirror after the focal point and shaping the incident beam. This idea is applied to confocal microscopy and brings about a dramatic improvement of the axial resolution.
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Submitted on : Saturday, November 13, 2010 - 11:19:14 PM
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Emeric Mudry, Eric Le Moal, P. Ferrand, Patrick Chaumet, Anne Sentenac. Isotropic diffraction-limited focusing using a single objective lens. Physical Review Letters, American Physical Society, 2010, 105 (20), pp.203903. ⟨10.1103/PhysRevLett.105.203903⟩. ⟨hal-00535900⟩

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