Communication: One-photon phase control of cis-trans isomerization in retinal.

J Chem Phys

Department of Chemical Sciences, Universidad Icesi, Cali, Colombia.

Published: February 2013

We computationally demonstrate the one-photon phase control of retinal isomerization under conditions of low laser intensity. The calculations, utilizing the multiconfigurational time dependent Hartree method, include coupling between the two modes that are active in isomerization and the background molecular vibrational environment. Noting previously unsuccessful computations highlights the significance of this result.

Download full-text PDF

Source
http://dx.doi.org/10.1063/1.4792834DOI Listing

Publication Analysis

Top Keywords

one-photon phase
8
phase control
8
communication one-photon
4
control cis-trans
4
cis-trans isomerization
4
isomerization retinal
4
retinal computationally
4
computationally demonstrate
4
demonstrate one-photon
4
control retinal
4

Similar Publications

Article Synopsis
  • The study focuses on one-photon absorption and circular dichroism in three compounds: fenchone, camphor, and 3-methylcyclopentanone (3MCP).
  • The results indicate that the transitions considered are weakly allowed, leading to significant anisotropies and necessitating the inclusion of non-Condon effects in theoretical models.
  • Experimental data for 3MCP reveals that Herzberg-Teller corrections are essential to align theoretical predictions with observed features, underscoring the role of vibrational factors in electronic circular dichroism dynamics.
View Article and Find Full Text PDF

Sidelobe suppressed Bessel beams for one-photon light-sheet microscopy.

Biomed Opt Express

November 2024

SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, UK.

The Bessel beam (BB) has found widespread adoption in various forms of light-sheet microscopy. However, for one-photon fluorescence, the transverse profile of the beam poses challenges due to the detrimental effect of the sidelobes. Here, we mitigate this issue by using a computer-generated phase element for generating a sidelobe suppressed Bessel beam (SSBB).

View Article and Find Full Text PDF

Base stacking is fundamentally important to the stability of double-stranded DNA. However, few experiments can directly probe the local conformations and conformational fluctuations of the DNA bases. Here we report a new spectroscopic approach to study the local conformations of DNA bases using the UV-absorbing fluorescent guanine analogue, 6-methyl isoxanthopterin (6-MI), which can be used as a site-specific probe to label DNA.

View Article and Find Full Text PDF

Unveiling Ultrafast-Weak-Field Coherent Control of Indirect Dissociation Reactions.

J Phys Chem Lett

August 2024

Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics, Central South University, Changsha 410083, China.

Coherent control of molecular photodissociation through one-photon transitions has become a topic of interest in physical chemistry. Previous studies have shown that modulating the spectral phase of a single ultrafast laser pulse while keeping its spectral amplitude constant does not affect the dissociation yield of reactions originating from a pure eigenstate of the ground electronic state. Here, we explore the indirect photodissociation reaction of NaI molecules using theoretical and numerical methods.

View Article and Find Full Text PDF

A scheme for high-efficiency transfer of optical vortices is proposed by an inelastic two-wave mixing (ITWM) process in an inverted-Y four-level atomic medium, which is originally prepared in a coherent superposition of two ground states. The orbital angular momentum (OAM) information in the incident vortex probe field can be transferred to the generated signal field through the ITWM process. Choosing reasonable experimentally realizable parameters, we find that the presence of the off-resonance control field can greatly improve the conversion efficiency of optical vortices, rather than in the absence of a control field.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!