dorsal/arxiv
View SchemaRotational Control and Selective Isotope Alignment by Ultrashort Pulses
| Authors | Sharly Fleischer, I. Sh. Averbukh, Yehiam Prior |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0601197 |
| URL | https://arxiv.org/abs/quant-ph/0601197 |
Abstract
Strong ultrashort laser pulses give rise to prompt molecular alignment followed by full, half and quarter quantum revivals of the rotational wave packets. In Four Wave Mixing (FWM) experiments, we make use of the long succession of repetitive alignment revivals to demonstrate isotope-selective alignment and time-resolved discrimination between different isotopic species. For two isotopes with a commensurate ratio of their moments of inertia, we observe constructive and destructive interferences of the FWM signals originating from different isotopes. Such destructive interference serves as an indication for distinct transient angular distributions of different isotopic species, paving the way to novel time-resolved analytic techniques, as well as to robust methods for isotope separation. When two pulses are used, enhancement or reduction of the degree of rotational excitation and of the corresponding molecular alignment is observed, depending on the delay between pulses. We implement the double pulse excitation scheme in a binary isotopic mixture, enhancing the rotational excitation of one isotopic component while almost totally reducing the rotational excitation of the other.
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"abstract": "Strong ultrashort laser pulses give rise to prompt molecular alignment\nfollowed by full, half and quarter quantum revivals of the rotational wave\npackets. In Four Wave Mixing (FWM) experiments, we make use of the long\nsuccession of repetitive alignment revivals to demonstrate isotope-selective\nalignment and time-resolved discrimination between different isotopic species.\nFor two isotopes with a commensurate ratio of their moments of inertia, we\nobserve constructive and destructive interferences of the FWM signals\noriginating from different isotopes. Such destructive interference serves as an\nindication for distinct transient angular distributions of different isotopic\nspecies, paving the way to novel time-resolved analytic techniques, as well as\nto robust methods for isotope separation. When two pulses are used, enhancement\nor reduction of the degree of rotational excitation and of the corresponding\nmolecular alignment is observed, depending on the delay between pulses. We\nimplement the double pulse excitation scheme in a binary isotopic mixture,\nenhancing the rotational excitation of one isotopic component while almost\ntotally reducing the rotational excitation of the other.",
"arxiv_id": "quant-ph/0601197",
"authors": [
"Sharly Fleischer",
"I. Sh. Averbukh",
"Yehiam Prior"
],
"categories": [
"quant-ph"
],
"title": "Rotational Control and Selective Isotope Alignment by Ultrashort Pulses",
"url": "https://arxiv.org/abs/quant-ph/0601197"
},
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"variant": "snapshot-2026-03-01",
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