ackermann_2018 ============== P\. Ackermann, X\. Laforgue, M\. Hilbig, M\. Schilder and T\. Halfmann, J\. Opt\. Soc\. Am\. B 35, 468 \(2018\) `Source record `__ · :doc:`Catalogue ` · :doc:`Review register ` DOI: `10\.1364/josab\.35\.000468 `__ **Source kind:** measurement **Recorded technique:** Phase\-matched fifth\-harmonic generation \(101\-104 nm\) of a picosecond dye laser in an argon\-filled waveguide near the 4s five\-photon resonance; simulation with waveguide modes and a model refractive index of argon\. **Materials in structured entries:** None recorded. **Dataset quantities:** None recorded. **Contents:** 0 datasets; 0 formulas. Curation notes -------------- Nothing extracted\: the argon refractive index \(Appendix A, Section 3\) is a model\: a Lorentz sum over the dipole\-allowed bound states up to 5d \(81\.62 nm\) with oscillator strengths from Chan et al\. averaged with Xu and Wu, plus a continuum from the photoabsorption cross section through Kramers\-Kronig; the paper prints no refractivity values \('The values differ less than 1 % from the Sellmeier equation approach within its valid spectral regime', citing Bideau\-Mehu et al\.\)\. The nonlinear susceptibilities of its Table 2 and the literature n2 \(10e\-20 cm^2/W at 800 nm\) and n4 values belong to the nonlinear\-optics phase\. Table 1 is a modal power decomposition of the pump beam\. **Recorded bibliographic identity status:** VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents. Datasets -------- No datasets are recorded. Formulas -------- No formulas are recorded. Corrections ----------- No dataset errata are recorded in this source record. Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the :doc:`review register ` for the checks and decisions.