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Functionalization of Atomic Force Microscope Cantilevers with Single-T Cells or Single-Particle for Immunological Single-Cell Force Spectroscopy
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High-numerical-aperture and long-working-distance objective for single-atom experiments.

Shaokang Li1, Gang Li1, Wei Wu1

  • 1State Key Laboratory of Quantum Optics and Quantum Optics Devices, and Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China.

The Review of Scientific Instruments
|May 3, 2020
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Summary

We developed a new long-working-distance objective lens for single-atom experiments. This lens corrects aberrations and achieves diffraction-limited performance, enabling precise trapping and manipulation of single atoms.

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Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Optical Engineering

Background:

  • Precise manipulation of single atoms requires advanced optical systems.
  • Long working distances are crucial for minimizing disturbance in experiments.

Purpose of the Study:

  • To present a novel long-working-distance objective lens for single-atom experiments.
  • To achieve diffraction-limited performance with aberration correction.

Main Methods:

  • Assembly using commercial 1-inch singlets.
  • Correction of spherical aberrations for various vacuum window thicknesses.
  • Optimization for diffraction-limited performance across visible and near-infrared wavelengths.

Main Results:

  • Numerical aperture (NA) of 0.4.
  • Working distance of 18.2 mm with a 5-mm silica window at 852 nm.
  • Diffraction-limited field of view of 0.61 mm and spatial resolution of 1.3 μm.
  • Simulated and experimentally confirmed performance.

Conclusions:

  • The objective lens is suitable for trapping and manipulating single atoms.
  • Its design allows for flexibility and optimization for various experimental conditions.