Generation of continuously tunable coherent vacuum-ultraviolet radiation (140 to 106 nm) in zinc vapor

Jamroz, W.; LaRocque, P. E.; Stoicheff, B. P.

doi:10.1364/ol.7.000617

Cited by 43 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a theoretical estimate of the splitting,1 4 we used RCN' 2 to compute 11P6s(0)1 2 for Cs 5p 6 6s and Cs 5p 5 5d6s. (The 5d electron and the 5p 5 subshell contribute little to this hyperfine interaction.)…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Identification and oscillator-strength measurement of the 1091-nm transition in neutral Cs

et al. 1986

View full text Add to dashboard Cite

The 109.1-nm transition in neutral Cs is the prototype of a class of transitions that originate from doubly excited quasi-metastable quartet levels. In this Letter we describe experiments that use tunable VUV radiation to determine the identity of this transition, to measure its oscillator strength, and to estimate its hyperfine splitting.In recent work' it was postulated that particular coreexcited quartet levels of alkali and alkalilike ions should have radiative rates that are comparable with their autoionizing rates. This occurs since, by LS selection rules, these levels may couple only to doublet levels, which are themselves prohibited from autoionizing by angular momentum and parity considerations. Levels of this type have been termed quasimetastable and are specified by the condition that IJ -Li = 3/2 and that parity and angular momentum be both even or odd; they can occur even in heavy atoms.The 109.1-nm transition in Cs (Fig. 1) is a prototype of the class of transitions that originate from levels of this type. The upper level of this transition is Cs(5p55d6s)4P;/ 2 and is expected to radiate to the valence fine-structure levels Cs(5p 6 5d) 2 P 5 / 2 and Cs(5p 6 5d) 2 P 3 / 2 . Holmgren et al. 2 recently observed intense emission at 109.1 nm using a pulsed hollowcathode discharge and, on the basis of the fine-structure splitting and the intensity ratio of its fine-structure components, ascribed the radiation as originating from this transition. Somewhat earlier, Aleksakhin et al.3 associated radiation at 108.5 nm with the same transition.In this Letter we describe an experiment to confirm the identity of this transition through accurate measurements of the fine-structure splitting and from estimates of the oscillator strength and hyperfine splitting. A pulsed hollow cathode was used to populate the lower level of this transition, and tunable VUV radiation, generated by four-wave mixing, was used to make absorption measurements at near-Doppler-limited resolution.resonant level between 73 228 and 74 074 cm-'. Referring to Fig. 2(a), the desired level was found by observing degenerate 4WSFM (tripling) through successive levels in the Zn 4sns 'So Rydberg series.Based on a quantum-defect extrapolation from the (tabulated) 6 lower members of the series, we identify the level at 73 747.7 cm-1 as Zn 4slOs 'So. No other two-photon levels were observed within the necessary energy range.A single Q-switched, frequency-doubled Nd:YAG laser was used to pump two dye-laser systems. The first was operated with an intracavity 6talon to narrow the linewidth to 0.05 cm-, tuned to 542.2 nm, and frequency doubled to provide the two-photon resonant wave. The second dye laser was tuned around a small region near 558 nm and had a linewidth of 0.3 cm-'. The two outputs were combined by using a dichroic mirror and focused into the Zn cell at a power density of about 2 X 1010 W cm-2 . The Zn cell consisted of a 2.5-cm-diameter stainless-steel tube (horizontal) with a 6-cm-long hot zone produced by an external (vertical) sodium hea...

show abstract

Section: Resultsmentioning

confidence: 99%

“…Tunable radiation near 109.1 nm was generated using two-photon resonant four-wave sum-frequency mixing (4WSFM) using a process in Zn similar to that of Jamroz et al 4 '…”

Section: Methodsmentioning

confidence: 99%

Identification and oscillator-strength measurement of the 1091-nm transition in neutral Cs

et al. 1986

View full text Add to dashboard Cite

show abstract

“…Sources of VUV radiation are currently limited to excimer lasers [8] and nonlinear methods using frequency mixing in gases [9,10] metal vapors [11], and nonlinear crystals [12]. Unfortunately, these sources are either cumbersome or difficult to maintain.…”

Section: Introductionmentioning

confidence: 99%

Micro-pulling down method-grown Er3+:LiCaAlF6 as prospective vacuum ultraviolet laser material

Cadatal-Raduban

Shimizu

Yamanoi

et al. 2013

Journal of Crystal Growth

View full text Add to dashboard Cite

“…The Stoicheff group has taken part in the development of narrowband tunable extreme ultraviolet (XUV) laser radiation sources based on nonlinear optic conversion in gases. After initial work on wave-mixing in metal vapors [1][2][3][4][5] and molecular gases [6] resonance-enhanced sum-frequency mixing processes in noble gases were studied. Tunable narrowband XUV light was applied by Stoicheff et al in excitation studies of molecular hydrogen, resulting in the celebrated work on the accurate determination of the dissociation limit in H 2 , D 2 and HD from measurements of the onset of dissociation at the n = 2 limit [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Gerade/ungerade symmetry-breaking in HD at the n = 2 dissociation limit

Lange¹,

Reinhold²,

Hogervorst³

et al. 2000

Can. J. Phys.

View full text Add to dashboard Cite

Abstract:We report on a study of the I 1 g outer well state of HD. Via a resonance-enhanced XUV + IR (extreme ultraviolet + infrared) excitation scheme, rovibronic levels (v = 0-2, J = 1-4) are populated and probed by pulsed lasers. Level energies are measured with an accuracy of ≈0.03 cm −1 . Due to gerade-ungerade symmetry breaking, the long-range behavior of the I potential in HD deviates from that of H 2 and D 2 . When this deviation is taken into account a semi-empirical potential for the I [Traduit par la rédaction]

show abstract

Generation of continuously tunable coherent vacuum-ultraviolet radiation (140 to 106 nm) in zinc vapor

Abstract: It is shown that resonantly enhanced, four-wave frequency mixing in Zn vapor provides coherent vacuum-ultraviolet radiation that is continuously tunable over the range 140.4 to 106.3 nm (or ~23000 cm(-1)).

Cited by 43 publications

References 12 publications

Identification and oscillator-strength measurement of the 1091-nm transition in neutral Cs

Identification and oscillator-strength measurement of the 1091-nm transition in neutral Cs

Micro-pulling down method-grown Er3+:LiCaAlF6 as prospective vacuum ultraviolet laser material

Gerade/ungerade symmetry-breaking in HD at the <i><b>n</b></i> = <b>2</b> dissociation limit

Contact Info

Product

Resources

About