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arXiv:1504.03171 · Optics Express

Nanoscale resolution for fluorescence microscopy via adiabatic passage

J. L. Rubio, Daniel Viscor, V. Ahufinger, J. Mompart

Published Sep 12, 2013• 7 citations
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Abstract

We propose the use of the subwavelength localization via adiabatic passage technique for fluorescence microscopy with nanoscale resolution in the far field. This technique uses a Λ-type medium coherently coupled to two laser pulses: the pump, with a node in its spatial profile, and the Stokes. The population of the Λ system is adiabatically transferred from one ground state to the other except at the node position, yielding a narrow population peak. This coherent localization allows fluorescence imaging with nanometer lateral resolution. We derive an analytical expression to asses the resolution and perform a comparison with the coherent population trapping and the stimulated-emission-depletion techniques.

DOI
10.1364/oe.21.022139

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We propose the use of the subwavelength localization via adiabatic passage technique for fluorescence microscopy with nanoscale resolution in the far field. This technique uses a Λ-type medium coherently coupled to two laser pulses: the pump, with a node in its spatial profile, and the Stokes. The population of the Λ system is adiabatically transferred from one ground state to the other except at the node position, yielding a narrow population peak. This coherent localization allows fluorescence imaging with nanometer lateral resolution. We derive an analytical expression to asses the resolution and perform a comparison with the coherent population trapping and the stimulated-emission-depletion techniques.
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We present a coherent population trapping based scheme to attain sub-nanoscale resolution for atom localization, microscopy and lithography. Our method uses three-level atoms coupled to amplitude modulated probe field and spatially dependent drive field. The modulation of the probe field allows us to tap into the steep dispersion normally associated with electromagnetically induced transparency and offers an avenue to attain sub-nanometer resolution using just optical fields. We illustrate application of the techniques to the area of microscopy and lithography and show how multilevel schemes offer the possibility of improving resolution further.
In this work, the authors proposed a novel state selective atom localization and patterning scheme named subwavelength localization via adiabatic passage (SLAP) that consists in coupling two partially overlapping and spatially structured laser fields to three internal levels of the matter wave yielding state-selective localization at those positions where the adiabatic passage process does not occur. Compared to the coherent population trapping (CPT) based techniques, the SLAP technique presents several important advantages. The paper describes the SLAP technique to coherently achieve state-selective patterning and addressing of matter waves and analyze its potential implementation for nanolithography with an atomic beam of metastable Ne and for coherent patterning of a two-component87Rb BEC.
We propose the subwavelength localization via adiabatic passage (SLAP) technique to coherently achieve state-selective patterning of matter waves well beyond the diffraction limit. The SLAP technique consists in coupling two partially overlapping and spatially structured laser fields to three internal levels of the matter wave yielding state-selective localization at those positions where the adiabatic passage process does not occur. We show that by means of this technique matter wave localization down to the single nanometer scale can be achieved. We analyze in detail the potential implementation of the SLAP technique for nanolithography with an atomic beam of metastable ${\text{Ne}}^{\ensuremath{\ast}}$ and for coherent patterning of a two-component 87Rb^{87}\text{R}\text{b}87Rb Bose-Einstein condensate.
We evaluate the resonance-fluorescence spectrum of a bunch of two-level atoms driven by a gradient coherent laser field. The result shows that we can determine the positions of atoms from the spectrum even when the atoms locate within the subwavelength range and the dipole-dipole interaction is significant. This far-field resonance-fluorescence-localization microscopy method does not require point-by-point scanning, and it may be more time efficient. We also give a possible scheme to extract the position information in an extended region without requiring more peak power of the laser. Finally, we also briefly discuss how to perform two-dimensional imaging based on our scheme.