An Optical Phenomenon

CHARLES E. BENHAM

doi:10.1038/080458a0

Monochromatic Conical IR Emission from Decaying KrF Laser Filaments in Xenon as Coherent Stimulated Four-Wave Mixing Process

Photonics ◽

10.3390/photonics8020047 ◽

2021 ◽

Vol 8 (2) ◽

pp. 47

Author(s):

Igor V. Smetanin ◽

Alexey V. Shutov ◽

Nikolay N. Ustinovskii ◽

Vladimir D. Zvorykin ◽

Anna V. Bogatskaya ◽

...

Keyword(s):

Transverse Relaxation Time ◽

Four Wave Mixing ◽

Theoretical Background ◽

Wave Mixing ◽

Mixing Process ◽

Optical Phenomenon ◽

Coherent Interaction ◽

Conical Emission ◽

Krf Laser ◽

Ir Emission

We develop theoretical background for the new nonlinear optical phenomenon of narrowly directed monochromatic IR conical emission which has been recently observed when 248-nm UV filaments propagate in xenon (V. D. Zvorykin, et al., Laser Phys. Lett. 13, 125404 (2016)). We treat it as coherent stimulated four-wave mixing process in which two pump KrF laser photons are converted into the coupled pair of resonance IR(828 nm) and VUV (147 nm) photons through 5p5(2P3/2)6p[1/2]0→5p5(2P3/2)6s[3/2]1o and 5p5(2P3/2)6s[3/2]1o→1S0 transitions. We explore the coherent interaction regime which proceeds at a time scale shorter than transverse relaxation time T2. The momentum and energy conservation laws determine the characteristic angle of conical emission. We find that the threshold of this coherent process is determined by the KrF laser pump pulse area.

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A New Optical Phenomenon: Exciton Surface Polaritons at Room Temperature

Molecular Crystals and Liquid Crystals ◽

10.1080/15421407908084422 ◽

1979 ◽

Vol 50 (1) ◽

pp. 139-162 ◽

Cited By ~ 17

Author(s):

M. R. Philpott ◽

A. Brillante ◽

I. R. Pockrand ◽

J. D. Swalen

Keyword(s):

Room Temperature ◽

Surface Polaritons ◽

Optical Phenomenon

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An Optical Phenomenon

Nature ◽

10.1038/081220a0 ◽

1909 ◽

Vol 81 (2077) ◽

pp. 220-220

Author(s):

L. G. HOXTON

Keyword(s):

Optical Phenomenon

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An Optical Phenomenon

Nature ◽

10.1038/070396a0 ◽

1904 ◽

Vol 70 (1817) ◽

pp. 396-396

Author(s):

GEORGE W. WALKER

Keyword(s):

Optical Phenomenon

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'A Singular Optical Phenomenon'

Science ◽

10.1126/science.ns-3.71.704.a ◽

1884 ◽

Vol ns-3 (71) ◽

pp. 704-704

Author(s):

J. Herschel

Keyword(s):

Optical Phenomenon

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'A Singular Optical Phenomenon'

Science ◽

10.1126/science.ns-3.61.404.b ◽

1884 ◽

Vol ns-3 (61) ◽

pp. 404-404

Author(s):

Joseph Le Conte

Keyword(s):

Optical Phenomenon

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Application of Moire Methods to the Determination of Transient Stress and Strain Distributions

Journal of Applied Mechanics ◽

10.1115/1.3636492 ◽

1962 ◽

Vol 29 (1) ◽

pp. 23-29 ◽

Cited By ~ 26

Author(s):

W. F. Riley ◽

A. J. Durelli

Keyword(s):

Strain Distribution ◽

Stress And Strain ◽

Two Dimensional ◽

Distribution Problem ◽

Principal Stresses ◽

Transient Stress ◽

Optical Phenomenon ◽

Moiré Effect ◽

Fringe Patterns

When two arrays of lines are superimposed an optical phenomenon known as the moire effect is observed under certain conditions. This moire effect is used by the authors to determine the distribution of transient strains on the surface of two-dimensional bodies. The method can be used to solve completely the strain-distribution problem or it can be used in combination with photoelasticity to separate the principal stresses. The methods used in interpreting the moire fringe patterns and the techniques used to produce the patterns are described in the paper. Two applications are discussed.

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