Echoes in Space and Time
| Autor: | Heping Zeng, Yehiam Prior, Xiaochun Gong, Junyang Ma, Wenbin Zhang, Qiying Song, Kang Lin, Jian Wu, Qinying Ji, Ilya Sh. Averbukh, Peifen Lu, E. Gershnabel, Jean-Michel Hartmann, G. Karras, Olivier Faucher, Guillaume Siour |
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| Přispěvatelé: | Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2016 |
| Předmět: |
QC1-999
Physics::Medical Physics Physics::Optics General Physics and Astronomy 02 engineering and technology 01 natural sciences law.invention Optics law 0103 physical sciences 010306 general physics Physics Spacetime business.industry Echo (computing) 021001 nanoscience & nanotechnology Laser Orientation (vector space) Computer Science::Sound [SDU]Sciences of the Universe [physics] Excited state Femtosecond 0210 nano-technology business Physics - Optics |
| Zdroj: | Physical Review X Physical Review X, 2016, 6, ⟨10.1103/PhysRevX.6.041056⟩ Physical Review X, Vol 6, Iss 4, p 041056 (2016) |
| ISSN: | 2160-3308 |
| DOI: | 10.1103/physrevx.6.041056 |
| Popis: | International audience; Echo in mountains is a well-known phenomenon, where an acoustic pulse is mirrored by the rocks, often with reverberating recurrences. For spin echoes in magnetic resonance and photon echoes in atomic and molecular systems, the role of the mirror is played by a second, time-delayed pulse that is able to reverse the flow of time and recreate the original impulsive event. Recently, alignment and orientation echoes were discussed in terms of rotational-phase-space filamentation, and they were optically observed in laser-excited molecular gases. Here, we observe hitherto unreported fractional echoes of high order, spatially rotated echoes, and the counterintuitive imaginary echoes at negative times. Coincidence Coulomb explosion imaging is used for a direct spatiotemporal analysis of various molecular alignment echoes, and the implications to echo phenomena in other fields of physics are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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