Precision laser spectroscopy of the 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mmultiscripts><mml:mi>S</mml:mi><mml:mn>0</mml:mn><mml:none /><mml:mprescripts /><mml:none /><mml:mn>1</mml:mn></mml:mmultiscripts><mml:mo>–</mml:mo><mml:mn>3</mml:mn><mml:mmultiscripts><mml:mi>D</mml:mi><mml:mn>2</mml:mn><mml:none /><mml:mprescripts /><mml:none /><mml:mn>1</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>
 two-photon transition in 
<mml:math xmlns:mml="http://www

Huang, Yi-Jan; Guan, Yuduo; Peng, Jin-Long; Shy, Jow−Tsong; Wang, Li-Bang

doi:10.1103/physreva.101.062507

Cited by 4 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Particularly, zero-background Doppler-free scheme, such as polarization spectroscopy [11,12], intermodulated optogalvanic spectroscopy [13,14], intermodulated fluorescence spectroscopy [15], resonance ionization spectroscopy [16] and crossed laser-atomic beam methods [7-10, 17, 18] are powerful techniques to improve spectral SNR for observing weak transitions. One of the method, the two-photon spectroscopy in a power-enhanced cavity, has been successfully achieved for helium 2 1 S 0 − 3 3 D 2 transition [19,20]. Previous investigations of helium energy levels have predominantly been focused on transitions within the triplet manifold, encompassing studies of fine and hyperfine structures, as well as total transition frequencies.…”

Section: Introductionmentioning

confidence: 99%

Two-photon spectroscopy of helium 23S1-83D2,3 transitions at 544 nm with a 1.2 W compact laser system

Wu,

Wang

2023

Preprint

Self Cite

View full text Add to dashboard Cite

We have demonstrated two-photon spectroscopy in a power-enhanced cavity of helium 23S1-83D2,3 transitions in a radio frequency (RF)-discharged vapor cell with a compact laser system at 544 nm. An external-cavity diode laser at 1088 nm was constructed to seed a Ytterbium-doped fiber amplifier. By employing a MgO:PPLN crystal, we have successfully doubled the laser frequency of the fiber amplifier output, generating laser power exceeding 1.2 W at 544 nm. The normalized doubling efficiency was measured to be $0.78 \%/cm\cdot{}W$.The optical power within the power-enhanced cavity was 11.8 W.Notably, the 23S1-83D2,3 transitions were observed for the first time. Subsequently, we have investigated the pressure shift and AC stark effect of the spectra.These results pave the way for precision measurement of the transition frequencies and will provide stringent test for QED atomic calculations.

show abstract

Section: Introductionmentioning

confidence: 99%

Two-photon spectroscopy of helium 23S1-83D2,3 transitions at 544 nm with a 1.2 W compact laser system

Wu,

Wang

2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Two-photon spectroscopy of helium $$2^3S_1$$–$$8^3D_{1,2,3}$$ transitions at 544 nm with a 1.2 W compact laser system

Wu,

Wang

2023

Appl. Phys. B

View full text Add to dashboard Cite

Measuring the α-particle charge radius with muonic helium-4 ions

Krauth

Schuhmann

Ahmed

et al. 2021

Nature

View full text Add to dashboard Cite

The energy levels of hydrogen-like atomic systems can be calculated with great precision. Starting from their quantum mechanical solution, they have been refined over the years to include the electron spin, the relativistic and quantum field effects, and tiny energy shifts related to the complex structure of the nucleus. These energy shifts caused by the nuclear structure are vastly magnified in hydrogen-like systems formed by a negative muon and a nucleus, so spectroscopy of these muonic ions can be used to investigate the nuclear structure with high precision. Here we present the measurement of two 2S–2P transitions in the muonic helium-4 ion that yields a precise determination of the root-mean-square charge radius of the α particle of 1.67824(83) femtometres. This determination from atomic spectroscopy is in excellent agreement with the value from electron scattering1, but a factor of 4.8 more precise, providing a benchmark for few-nucleon theories, lattice quantum chromodynamics and electron scattering. This agreement also constrains several beyond-standard-model theories proposed to explain the proton-radius puzzle2–5, in line with recent determinations of the proton charge radius6–9, and establishes spectroscopy of light muonic atoms and ions as a precise tool for studies of nuclear properties.

show abstract

Precision laser spectroscopy of the 2S01–3D21 two-photon transition in
Yi-Jan Huang
¹
,
Yuduo Guan
²
,
Jin-Long Peng
³

et al.

Cited by 4 publications

References 35 publications

Two-photon spectroscopy of helium 23S1-83D2,3 transitions at 544 nm with a 1.2 W compact laser system

Two-photon spectroscopy of helium 23S1-83D2,3 transitions at 544 nm with a 1.2 W compact laser system

Two-photon spectroscopy of helium $$2^3S_1$$–$$8^3D_{1,2,3}$$ transitions at 544 nm with a 1.2 W compact laser system

Measuring the α-particle charge radius with muonic helium-4 ions

Contact Info

Product

Resources

About

Precision laser spectroscopy of the 2S01–3D21 two-photon transition in Yi-Jan Huang1, Yuduo Guan2, Jin-Long Peng3 et al.

Cited by 4 publications

References 35 publications

Two-photon spectroscopy of helium 23S1-83D2,3 transitions at 544 nm with a 1.2 W compact laser system

Two-photon spectroscopy of helium 23S1-83D2,3 transitions at 544 nm with a 1.2 W compact laser system

Two-photon spectroscopy of helium $$2^3S_1$$–$$8^3D_{1,2,3}$$ transitions at 544 nm with a 1.2 W compact laser system

Measuring the α-particle charge radius with muonic helium-4 ions

Contact Info

Product

Resources

About

Precision laser spectroscopy of the 2S01–3D21 two-photon transition in
Yi-Jan Huang
¹
,
Yuduo Guan
²
,
Jin-Long Peng
³

et al.