Abstract
Two-color nanosecond dye lasers were used to excite potassium vapor cell, and 404-nm violet beam output was observed. This violet beam owns good collimation and transient properties, and its wavelength matches with the transition from potassium 52P3/2,1/2 doublet to the ground state. An analysis process shows that the violet light mechanism is attributed to two-photon-induced 42S1/2 → 42P3/2 → 42D3/2,5/2/62S1/2 transition, 42D3/2,5/2/62S1/2 → 52P3/2,1/2 SHRS (stimulated hyper-Raman scattering), and FWM (four-wave-mixing) processes; this is a third-order nonlinear optics process. Violet light doublet-line intensity ratio was found to change while fine scanning of excitation wavelength; this shifting was thought related to the FWM resonant degree. Potassium violet light is expected to become new tunable light source.
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This manuscript has no associated data, or the data will not be deposited. [Authors’ comment: All data published in this manuscript are available under request to the authors].
References
J.F. Sell, M.A. Gearba, B.D. DePaola, R.J. Knize, Collimated blue and infrared beams generated by two-photon excitation in Rb vapor. Opt. Lett. 39, 528–531 (2014)
J.T. Schultz, S. Abend, D. Döring, J.E. Debs, P.A. Altin, J.D. White, N.P. Robins, J.D. Close, Coherent 455 nm beam production in a cesium vapor. Opt. Lett. 34, 2321–2323 (2009)
P.L. Zhang, Y.C. Wang, A.L. Schawlow, Generation of coherent UV radiation by optical wave-mixing processes in atomic potassium. J. Opt. Soc. Am. B 1, 9–14 (1984)
P.-L. Zhang, A.L. Schawlow, Two-photon resonant optical processes in atomic potassium. Can. J. Phys. 62, 1187–1197 (1984)
Z.J. Jabbour, M.S. Malcuit, J. Huennekens, Broadly tunable near-infrared six-wave mixing processes in potassium vapor. Appl. Phys. B 52, 281–289 (1991)
M.-H. Lu, Y.-M. Liu, Axially phase-matched parametric four- and six-wave mixing in potassium vapor. Appl. Phys. B 54, 288–294 (1992)
M.E. Movsesyan, A.V. Papoyan, C.B. Shmavonyan, Amplification of radiation due to the four-photon parametric process in potassium vapor. J. Russ. Laser Res. 16, 172–177 (1995)
T. Efthimiopoulos, M.E. Movsessian, M. Katharakis, N. Merlemis, Cascade emission and four-wave mixing parametric processes in potassium. J. Appl. Phys. 80, 639–643 (1996)
M. Katharakis, N. Merlemis, A. Serafetinides, T. Efthimiopoulos, Four-wave mixing and parametric four-wave mixing near the 4P 4S transition of the potassium atom. J. Phys. B: At. Mol. Opt. Phys. 35, 4969–4980 (2002)
N. Merlemis, M. Katharakis, E. Koudoumas, T. Efthimiopoulos, Stimulated emissions and quantum interference in potassium atom laser interaction. J. Phys. B: At. Mol. Opt. Phys. 36, 1943–1956 (2003)
D. Pentaris, G. Chatzikyriakos, A. Armyras, T. Efthimiopoulos, Emissions in potassium vapour under 4S1/2–7S1/2 two-photon nsec excitation. AIP Conf. Proc. 1288, 170–173 (2010)
K.C. Brown, E.J. Hurd, J.C. Holtgrave, G.P. Perram, Stimulated electronic Raman and hyper-Raman scattering in potassium vapor. Opt. Commun. 309, 21–25 (2013)
Y.-W. Liu, P.E.G. Baird, Two-photon spectroscopy in potassium. Meas. Sci. Technol. 12, 740–743 (2001)
N. Merlemis, A. Lyras, M. Katharakis, T. Efthimiopoulos, Amplified spontaneous emission without population inversion in potassium vapour by internally generated fields. J. Phys. B: At. Mol. Opt. Phys. 39, 1913–1927 (2006)
N. Merlemis, G. Papademetriou, D. Pentaris, T. Efthimiopoulos, V. Vaičaitis, Axial coherent emissions controlled by an internal coupling field in an open four-level potassium system. Appl. Phys. B 124, 145 (2018)
C.B. Alcock, V.P. Itkin, M.K. Horrigan, Vapour pressure equations for the metallic elements: 298–2500 K. Can. Metall. Q. 23, 309–313 (1984)
NIST Atomic Spectra Database (ver. 5.9). National Institute of Standards and Technology, Gaithersburg, MD. https://physics.nist.gov/asd. Accessed 28 Jan 2022. https://doi.org/10.18434/T4W30F
H.-W. Wang, M.-H. Lu, The observation of the competition and suppression for stimulated Raman scattering near the potassium 4S–5P resonance. J. Phys. B: At. Mol. Opt. Phys. 33, 4973–4980 (2000)
B. Gai, S. Hu, J. Liu, R. Cao, J. Guo, Y. Jin, F. Sang, The response speed and fatigue characteristics of a pulsed 778nm→420nm conversion in rubidium vapor. Opt. Commun. 374, 142–147 (2016)
A.M. Akulshin, R.J. McLean, A.I. Sidorov, P. Hannaford, Coherent and collimated blue light generated by four-wave mixing in Rb vapour. Opt. Express 17, 22861–22870 (2009)
Acknowledgements
This work was supported by the National Natural Science Foundation of China (NSFC) under Grant No. 21973093, No. 22173102, No. 62005282, No. 22073101 and No. 61505210, Natural Science Foundation of Liaoning Province under Grant No. 2021-MS-021, Fundamental Research Project of Chinese State Key Laboratory of Laser Interaction with Matter under Grant No. SKLLIM1913, Dalian Science & Technology Star Program under Grant No. 2018RQ02, DICP under Grant No. DICPI201931.
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CL involved in manuscript writing-up and experiment; JL contributed to manuscript writing-up and discussion; BG took part in part of experiment and discussion; YC involved in time-resolved spectra collection; JL took part in excitation spectra collection; JG involved in phase matching of FWM explanation; SH took part in experimental ideal and manuscript improvement.
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Liu, C., Liu, J., Gai, B. et al. Potassium upconversion violet light generation under two-color two-photon excitation to 4D, 6S level. Eur. Phys. J. D 76, 88 (2022). https://doi.org/10.1140/epjd/s10053-022-00411-9
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DOI: https://doi.org/10.1140/epjd/s10053-022-00411-9