Tune-out and magic wavelengths for ground-state $^{23}$Na$^{40}$K molecules

TL;DR

This paper introduces a method to precisely control the trapping of $^{23}$Na$^{40}$K molecules by identifying tune-out and magic wavelengths, enabling state-dependent trapping with minimal scattering.

Contribution

It presents a novel rotational-state dependent trapping scheme for $^{23}$Na$^{40}$K molecules, including the determination of tune-out and magic frequencies near a narrow electronic transition.

Findings

Identified tune-out frequencies where one state's polarizability vanishes.

Determined a magic frequency where both states have equal polarizability.

Achieved dynamic switching between trap configurations with low scattering rates.

Abstract

We demonstrate a versatile, rotational-state dependent trapping scheme for the ground and first excited rotational states of $^{23}$Na$^{40}$K molecules. Close to the rotational manifold of a narrow electronic transition, we determine tune-out frequencies where the polarizability of one state vanishes while the other remains finite, and a magic frequency where both states experience equal polarizability. The proximity of these frequencies of only 10 GHz allows for dynamic switching between different trap configurations in a single experiment, while still maintaining sufficiently low scattering rates.