Excitation of rotons in parahydrogen crystals: The laser-induced-molecular-alignment mechanism
Lindgren, J., & Kiljunen, T. (2013). Excitation of rotons in parahydrogen crystals: The laser-induced-molecular-alignment mechanism. Physical Review A, 88(4), 043420(15). https://doi.org/10.1103/PhysRevA.88.043420
Julkaistu sarjassa
Physical Review APäivämäärä
2013Tekijänoikeudet
© 2013 American Physical Society
Solid parahydrogen (p-H₂) is known to support long-lived coherences, of the order of 100 ps, which enables high-resolution spectroscopy in the time domain. Rotational Raman-type excitations to sublevels of J=2 are delocalized due to electric-quadrupole–quadrupole coupling in p-H₂ crystals, and the resulting states can be characterized as rotons. Wave packets of rotons exhibit molecular alignment with respect to laboratory coordinates. Here the concept of field-free molecular alignment, induced by strong ultrashort laser pulses, is extended into a molecular solid case. We derive a solid-state analog for the gas-phase alignment measure and illustrate the time-dependent alignment degree in p-H₂crystals by numerical simulations. To underscore the Raman gain effect of the solid, general properties of the field-free alignment are revisited by comparing gaseous p-H₂ with N₂. The interplay between the polarization direction of the excitation pulses and the axis directionality of the crystal is shown to affect the alignment dynamics via the spatial (M=0,±1,±2 ) composition of the roton wave packets. We simulate experimental traces by incorporating the induced alignment degree in the calculation of heterodyne-detected realization of femtosecond pump-probe optical Kerr effect spectroscopy. With the help of dispersed, two-dimensional resolved images of the calculated signal we reproduce the experiment as a whole. To that end, the effects of probe chirp, shape, and power must be explored in detail. We find good agreement with previous experiments and unravel the ambiguity of tracing back the wave-packet composition from the signal; in particular, we find that the effect of quantum phase factors of all the components should be taken into account when explaining the signal properties.
...
Julkaisija
American Physical SocietyISSN Hae Julkaisufoorumista
1050-2947Asiasanat
Alkuperäislähde
http://pra.aps.org/browseJulkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/22992212
Metadata
Näytä kaikki kuvailutiedotKokoelmat
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
Helix Inversion Controlled by Molecular Motors in Multistate Liquid Crystals
Ryabchun, Alexander; Lancia, Federico; Chen, Jiawen; Morozov, Dmitry; Feringa, Ben L.; Katsonis, Nathalie (Wiley-VCH Verlag, 2020)Unravelling the rules of molecular motion is a contemporary challenge that promises to support the development of responsive materials and is likely to enhance the understanding of functional motion. Advances in integrating ... -
Controlling Exciton Propagation in Organic Crystals through Strong Coupling to Plasmonic Nanoparticle Arrays
Berghuis, Anton Matthijs; Tichauer, Ruth H.; de Jong, Lianne M. A.; Sokolovskii, Ilia; Bai, Ping; Ramezani, Mohammad; Murai, Shunsuke; Groenhof, Gerrit; Gómez Rivas, Jaime (American Chemical Society, 2022)Exciton transport in most organic materials is based on an incoherent hopping process between neighboring molecules. This process is very slow, setting a limit to the performance of organic optoelectronic devices. In this ... -
Growth, single crystal investigations, Hirshfeld surface analysis, DFT studies, molecular dynamics simulations, molecular docking, physico-chemical characterization and biological activity of novel thiocyanic complex with zinc transition metal precursor
Makhlouf, Jawher; El Bakri, Youness; Valkonen, Arto; Saravanan, Kandasamy; Ahmad, Sajjad; Smirani, Wajda (Elsevier, 2022)The present work undertakes the study of novel thiocyanic complex, which have been obtained due to the interaction of cationic entities with the thiocyanate ligands. In fact, these latter are added to a transition metal ... -
CCDC 1523871: Experimental Crystal Structure Determination
Helttunen, Kaisa; Nissinen, Maija (University of Jyväskylä; Contact details: Open Science Centre, University of Jyväskylä, email: jyx@jyu.fi, website: https://osc.jyu.fi/en, 2016) -
Crystal structures of 2,2'-bipyridin-1-ium 1,1,3,3-tetracyano-2-ethoxyprop-2-en-1-ide and bis(2,2'-bipyridin-1-ium) 1,1,3,3-tetracyano-2-(dicyanomethylene)propane-1,3-diide
Setifi, Zouaoui; Valkonen, Arto; Fernandes, Manuel A.; Nummelin, Sami; Boughzala, Habib; Setifi, Fatima; Glidewell, Christopher (International Union of Crystallography, 2015)In 2,20 -bipyridin-1-ium 1,1,3,3-tetracyano-2-ethoxyprop-2-en-1-ide, C10H9N2 + - C9H5N4O, (I), the ethyl group in the anion is disordered over two sets of atomic sites with occupancies 0.634 (9) and 0.366 (9), and the ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.