Results 31 to 40 of about 1,214,634 (346)

Calculating vibrational excited state absorptions with excited state constrained minimized energy surfaces

open access: yesThe Journal of Physical Chemistry A, 2023
The modeling and interpretation of vibrational spectra are crucial for studying reaction dynamics using vibrational spectroscopy. Previous theoretical developments have mainly focused on fundamental vibrational transitions. In this study, we present a new method that uses excited state constrained minimized energy surfaces (CMES) to describe ...
Yiwen Wang, Zehua Chen, Yang Yang
openaire   +2 more sources

Excited-state OH Mainline Masers in AU Geminorum and NML Cygni

open access: yes, 2007
Excited-state OH maser emission has previously been reported in the circumstellar envelopes of only two evolved stars: the Mira star AU Geminorum and the hypergiant NML Cygni.
Baudry A.   +18 more
core   +1 more source

Optical control of excited-state lifetimes [PDF]

open access: yes, 2010
Electronic excitation of particles in fluorescent materials can now be controlled using laser-assisted energy-transfer ...
Andrews, David, Bradshaw, David
core   +1 more source

Frequency domain interferometry for measuring ultrafast refractive index modulation and surface deformation

open access: yesAdvances in Physics: X, 2022
Ultrafast optical spectroscopy delivers unparalleled insights into the dynamic response of photoactive materials, including semiconducting, photonic and phase-change materials.
Ronnie R. Tamming   +2 more
doaj   +1 more source

Two-State Lasing in Microdisk Laser Diodes with Quantum Dot Active Region

open access: yesPhotonics, 2023
The two-state lasing phenomenon, which manifests itself in simultaneous laser emission through several optical transitions of quantum dots, is studied in microdisk diode lasers with different cavity diameters.
Ivan Makhov   +8 more
doaj   +1 more source

Stimulated resonant inelastic x-ray scattering with chirped, broadband pulses

open access: yes, 2018
We present an approach for initiating and tracing ultra-fast electron dynamics in core-excited atoms, molecules and solids. The approach is based on stimulated resonant inelastic x-ray scattering induced by a single, chirped, broadband XUV/x-ray pulse. A
Hollstein, Maximilian, Rohringer, Nina
core   +2 more sources

In situ n-doped nanocrystalline electron-injection-layer for general-lighting quantum-dot LEDs

open access: yesNature Communications
Quantum-dot optoelectronics, pivotal for lighting, lasing and photovoltaics, rely on nanocrystalline oxide electron-injection layer. Here, we discover that the prevalent surface magnesium-modified zinc oxide electron-injection layer possesses poor n-type
Yizhen Zheng   +11 more
doaj   +1 more source

Organoids in pediatric cancer research

open access: yesFEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Self-Organized Bottleneck in Energy Relaxation

open access: yes, 2003
We study an energy relaxation process after many degrees of freedom are excited in a Hamiltonian system with a large number of degrees of freedom. Bottlenecks of relaxation, where relaxations of the excited elements are drastically slowed down, are ...
  +13 more
core   +1 more source

Excited state geometry optimization with the density matrix renormalization group as applied to polyenes [PDF]

open access: yes, 2015
We describe and extend the formalism of state-specific analytic density matrix renormalization group (DMRG) energy gradients, first used by Liu et al (J. Chem. Theor.Comput. 9, 4462 (2013)).
Chan, Garnet Kin-Lic, Hu, Weifeng
core   +4 more sources

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