Optimal binary gratings for multi-wavelength magneto-optical traps
arXiv:2306.17080 · doi:10.1364/OE.498606
Abstract
Grating magneto-optical traps are an enabling quantum technology for portable metrological devices with ultracold atoms. However, beam diffraction efficiency and angle are affected by wavelength, creating a single-optic design challenge for laser cooling in two stages at two distinct wavelengths - as commonly used for loading e.g. Sr or Yb atoms into optical lattice or tweezer clocks. Here, we optically characterize a wide variety of binary gratings at different wavelengths to find a simple empirical fit to experimental grating diffraction efficiency data in terms of dimensionless etch depth and period for various duty cycles. The model avoids complex 3D light-grating surface calculations, yet still yields results accurate to a few percent across a broad range of parameters. Gratings optimized for two (or more) wavelengths can now be designed in an informed manner suitable for a wide class of atomic species enabling advanced quantum technologies.
arXiv comment11 pages, 3 figures, 2 tables. See also 4-page supplementary document
References in corpus (41)
- Magneto-optical trapping of a diatomic molecule
- Geodesy and metrology with a transportable optical clock
- Molecules cooled below the Doppler limit
- Space-borne Bose-Einstein condensation for precision interferometry
- A surface-patterned chip as a strong source of ultra-cold atoms for quantum technologies
- A cold atom pyramidal gravimeter with a single laser beam
- All-Optical Production of a Lithium Quantum Gas Using Narrow-Line Laser Cooling
- Multiaxis atom interferometry with a single diode laser and a pyramidal magneto-optical trap
- Narrow-line magneto-optical trap for erbium
- A Compact Cold-Atom Interferometer with a High Data-Rate Grating Magneto-Optical Trap and a Photonic-Integrated-Circuit-Compatible Laser System
- Grating chips for quantum technologies
- Single-laser, one beam, tetrahedral magneto-optical trap
- Sub-Doppler laser cooling of potassium atoms
- Laser cooling with a single laser beam and a planar diffractor
- Low-temperature, high-density magneto-optical trapping of potassium using the open 4S-5P transition at 405 nm
- Laser cooling in a chip-scale platform
- Integrated magneto-optical traps on a chip
- Sub-Doppler Cooling of Neutral Atoms in a Grating Magneto-Optical Trap
- Single-beam Zeeman slower and magneto-optical trap using a nanofabricated grating
- High Phase-Space Density of Laser-Cooled Molecules in an Optical Lattice
- Invited Review: Micro-fabricated components for cold atom sensors
- Phase-space properties of magneto-optical traps utilising micro-fabricated gratings
- Diffraction grating characterisation for cold-atom experiments
- Two-dimensional grating magneto-optical trap
- Cold-atom clock based on a diffractive optic
- Design and fabrication of diffractive atom chips for laser cooling and trapping
- Quantum-based vacuum metrology at NIST
- Confinement of an alkaline-earth element in a grating magneto-optical trap
- Compact ultracold electron source based on a grating magneto optical trap
- A passively pumped vacuum package sustaining cold atoms for more than 200 days
- Two-stage magneto-optical trapping and narrow-line cooling of Li atoms to high phase-space density
- Grating magneto-optical traps with complicated level structures
- Magneto-optical trap of a Group III atom
- Narrow-line cooling of Rb using 5S 6P open transition at 420 nm
- Narrow-linewidth cooling of Li atoms using the 2S-3P transition
- Characterization of Suspended Membrane Waveguides towards a Photonic Atom Trap Integrated Platform
- A grating-chip atomic fountain
- Comparison of an efficient implementation of gray molasses to narrow-line cooling for the all-optical production of a lithium quantum gas
- -enhanced gray molasses in a tetrahedral laser beam geometry
- Sub-Doppler laser cooling of K via the 4S5P transition
- Demonstration of a MOT in a Sub-Millimeter Membrane Hole