Tunable VUV Frequency Comb for ${}^{229m}$Th Nuclear Spectroscopy

Abstract

Laser spectroscopy of the ${}^{229m}$Th nuclear clock transition is necessary for the future construction of a nuclear-based optical clock. Precision laser sources with broad spectral coverage in the vacuum ultraviolet are needed for this task. Here, we present a tunable vacuum-ultraviolet frequency comb based on cavity-enhanced seventh-harmonic generation. Its tunable spectrum covers the current uncertainty range of the ${}^{229m}$Th nuclear clock transition.

References in corpus (22)

• Direct Frequency Comb Spectroscopy in the Extreme Ultraviolet
• Optical clock intercomparison with $6\times 10^{-19}$ precision in one hour
• Resolving the gravitational redshift within a millimeter atomic sample
• A Single-Ion Nuclear Clock for Metrology at the 19th Decimal Place
• Energy of the ${}^{229}$Th nuclear clock transition
• Nuclear quantum optics with x-ray laser pulses
• Measurement of the ${}^{229}$Th isomer energy with a magnetic micro-calorimeter
• Performance of a 229 Thorium solid-state nuclear clock
• Lifetime measurement of the ${}^{229}$Th nuclear isomer
• Excitation of the isomeric ^{229m}Th nuclear state via an electronic bridge process in ^{229}Th^+
• Efficient output coupling of intracavity high harmonic generation
• Extreme Ultraviolet Radiation With Coherence Time Greater Than 1 s
• Radiative lifetime and energy of the low-energy isomeric level in ${}^{229}$Th
• Sensitivity of ${}^{229}$Th nuclear clock transition to variation of the fine-structure constant
• Probing the Relaxed Relaxion at the Luminosity and Precision Frontiers
• Electronic bridge excitation in highly charged Th-229 ions
• The ${}^{229}$Th isomer: prospects for a nuclear optical clock
• Noncollinear enhancement cavity for record-high out-coupling efficiency of an extreme-UV frequency comb
• Theoretical predictions for the magnetic dipole moment of ${}^{229m}$Th
• Concepts for direct frequency-comb spectroscopy of ${}^{229\text{m}}$Th and an internal-conversion-based solid-state nuclear clock
• All-solid-state VUV frequency comb at 160 nm using multi-harmonic generation in a non-linear femtosecond enhancement cavity
• The concept of laser-based conversion electron Mössbauer spectroscopy for a precise energy determination of ${}^{229m}$Th

Cited by in corpus (3)

• Frequency ratio of the ${}^{229\mathrm{m}}$Th nuclear isomeric transition and the ${}^{87}$Sr atomic clock
• A low repetition rate optical frequency comb
• A continuous-wave vacuum ultraviolet laser for the nuclear clock