Two-photon four-wave mixing as a new probe for oxygen atoms

Konz, E.; Marowsky, G.; Rubahn, H.-G.

doi:10.1016/s0030-4018(96)00531-7

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…The relative intensities of the O( 3 P j ) peaks in Figure 2 are quite different from those measured for a similar discharge beam [15] with 2 + 1 REMPI at ∼226 nm, or for a microwave discharge beam with two-photon resonant degenerate four-wave mixing spectroscopy [19], which show a regular decrease in signal on going from j = 2 to j = 1 to j = 0. The 1 + 1' REMPI spectrum in Figure 2, however, is quite irregular, with a particularly weak 3 P 1 peak, and a 3 P 2 peak that is stronger than 3 P 0 .…”

Section: Resultscontrasting

confidence: 57%

Laser ionisation detection of O(³P_j) atoms in the VUV; application to photodissociation of O₂

et al. 2021

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Detection of O( 3 P j ) atoms using one-photon resonant excitation to the 3s 3 S o 1 state at ∼130 nm followed by near-threshold ionisation, i.e. 1 + 1' resonance-enhanced multi-photon ionisation, has been investigated. The aim was to achieve low ion recoil, improved sensitivity, and reliable angular momentum polarisation information, with an as simple as possible laser setup. An efficient 1 + 1' scheme has been found where the VUV light for the first step is generated by difference frequency (2ω 1 − ω 2 ) VUV generation, and the ionisation step 1' uses 2ω 2 around 289 nm. The presented scheme induces 9 m/s recoil of the O + ion using a two-dye laser system, and zero recoil should be possible by generating 302 nm radiation with a third dye laser. While this approach is much more sensitive than a previous 1 + 1' scheme using 212.6 nm for the 1' step, we found that the relatively intense radiation of the 2ω 2 beam does not saturate the 1' step. To test the ability of this scheme to accurately determine branching ratios, fine structure yields, and angular distributions including polarisation information, it has been applied to O 2 photodissociation around 130 nm with subsequent O( 3 P j ) fragment detection.

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Section: Resultscontrasting

confidence: 57%

Laser ionisation detection of O(³P_j) atoms in the VUV; application to photodissociation of O₂

et al. 2021

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Section: Resultscontrasting

confidence: 57%

Laser ionization detection of O($^3P_j$) atoms in the VUV; application to photodissociation of O$_2$

Wang,

Parker,

van de Meerakker

et al. 2021

Preprint

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Detection of nascent O( 3 Pj, j = 2, 1, 0) atoms using one-photon resonant excitation to the 3s 3 S o 1 state at ∼130 nm followed by near-threshold ionization, i. e., 1 + 1' resonance enhanced multi-photon ionization (REMPI), has been investigated. The aim was to achieve low ion recoil, improved sensitivity, and reliable angular momentum polarization information, with an as simple as possible laser setup. An efficient 1 + 1' scheme has been found where the VUV light for the first step 1 is generated by difference frequency (2ω1 − ω2) VUV generation by four wave mixing in Kr gas, and the ionization step 1' uses 2ω2 at 289 nm. The presented scheme induces 9 m/s recoil of the O + ion using a two-dye laser system, and zero recoil should be possible by generating 302 nm radiation with a third dye laser. While this approach is much more sensitive than a previous 1 + 1' scheme using 212.6 nm for the 1' step, we found that the relatively intense 289 nm radiation does not saturate the 1' step. In order to test the ability of this scheme to accurately determine branching ratios, fine structure yields, and angular distributions including polarization information, it has been applied to O2 photodissociation around 130 nm with subsequent O( 3 Pj) fragment detection.

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“…¡ÐÂÎËÊ, ÄÞÒÑÎÐÇÐÐÞÌ Ä ÓÂÃÑÕÇ [23], ÒÑÍÂÊÂÎ, ÚÕÑ ÒÓË ÑÒÓÇAEÇÎÇÐÐÞØ ÖÔÎÑÄËâØ (ÐÂÒÓËÏÇÓ, ÒÓË ÓÇÅËÔÕÓÂÙËË Ë ÒÑÔÕÓÑÇÐËË ÍÂÓÕ ÓÂÔÒÓÇ-AEÇÎÇÐËâ NO 2 ) £¹££ ÑÍÂÊÞÄÂÇÕÔâ ÒÑÎÇÊÐÑÌ ÂÎßÕÇÓÐÂÕË-ÄÑÌ ÏÇÕÑAEÖ ÎÂÊÇÓÐÑ-ËÐAEÖÙËÓÑÄÂÐÐÑÌ ×ÎÖÑÓÇÔÙÇÐÙËË. ¡ÄÕÑÓÞ ÓÂÃÑÕ [77] …”

Section: °ôðñäðþç ôøçïþ úçõþóçøäñîðñäñåñ äêâëïñAeçìôõäëâ ä äñêãöéAeunclassified

Coherent four-wave mixing in excited and ionized gas media: four-photon spectrochronography, ellipsometry, and nonlinear-optical imaging of atoms and ions

Желтиков¹,

Koroteev²

1999

Uspekhi Fizicheskikh Nauk

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Two-photon four-wave mixing as a new probe for oxygen atoms

Cited by 9 publications

References 25 publications

Laser ionisation detection of O(³P_j) atoms in the VUV; application to photodissociation of O₂

Laser ionisation detection of O(³P_j) atoms in the VUV; application to photodissociation of O₂

Laser ionization detection of O($^3P_j$) atoms in the VUV; application to photodissociation of O$_2$

Coherent four-wave mixing in excited and ionized gas media: four-photon spectrochronography, ellipsometry, and nonlinear-optical imaging of atoms and ions

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Two-photon four-wave mixing as a new probe for oxygen atoms

Cited by 9 publications

References 25 publications

Laser ionisation detection of O(3Pj) atoms in the VUV; application to photodissociation of O2

Laser ionisation detection of O(3Pj) atoms in the VUV; application to photodissociation of O2

Laser ionization detection of O($^3P_j$) atoms in the VUV; application to photodissociation of O$_2$

Coherent four-wave mixing in excited and ionized gas media: four-photon spectrochronography, ellipsometry, and nonlinear-optical imaging of atoms and ions

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Laser ionisation detection of O(³P_j) atoms in the VUV; application to photodissociation of O₂

Laser ionisation detection of O(³P_j) atoms in the VUV; application to photodissociation of O₂