Results 111 to 120 of about 155,967 (379)

Time-dependent photoionization of azulene: Competition between ionization and relaxation in highly excited states [PDF]

open access: yes, 2008
Pump-probe photoionization has been used to map the relaxation processes taking place from highly vibrationally excited levels of the S2 state of azulene, populated directly or via internal conversion from the S4 state.
Blanchet, V.   +7 more
core   +6 more sources

Picosecond to Millisecond Structural Dynamics in Human Ubiquitin.

open access: yesJournal of Physical Chemistry B, 2016
Human ubiquitin has been extensively characterized using a variety of experimental and computational methods and has become an important model for studying protein dynamics. Nevertheless, it has proven difficult to characterize the microsecond time scale
K. Lindorff‐Larsen   +3 more
semanticscholar   +1 more source

Formation of Laser‐Induced Periodic Surface Structures on Titanium Alloy Using a Picosecond Laser: Dependence on Fluence and Number of Laser Pulses

open access: yesAdvanced Materials Interfaces, EarlyView.
Laser treatment of materials is a versatile technique for generating ordered surface structures. Nevertheless, such structures are the result of laser parameters such as laser pulse fluence. We demonstrate that homogeneous low special frequency laser‐induced periodic surface structures are contingent on both single and effective fluence dose and can be
Iana Fomicheva   +6 more
wiley   +1 more source

Medical Applications of Picosecond Lasers for Removal of Non-Tattoo Skin Lesions—A Comprehensive Review

open access: yesApplied Sciences
Picosecond lasers are gaining increasing popularity in dermatology and aesthetic medicine due to their favorable safety profile and a wide range of therapeutic applications.
Anna Kroma-Szal   +6 more
doaj   +1 more source

Resistive Heating for Inducing Localized Crystal Growth in Organic Thin Film Devices

open access: yesAdvanced Materials Technologies, EarlyView.
Rubrene thin films are promising for organic optoelectronics due to high hole mobility. However, uncontrolled crystallization and grain boundaries from standard thermal processing hinder lateral device scalability. This work presents femtosecond‐laser micromachining and patterned resistive heating to induce localized, deterministic crystallization ...
Anna‐Lena Hofmann   +9 more
wiley   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

open access: yesAdvanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane   +4 more
wiley   +1 more source

Picosecond optical vortex pulse illumination forms a monocrystalline silicon needle

open access: yesScientific Reports, 2016
The formation of a monocrystalline silicon needle by picosecond optical vortex pulse illumination was demonstrated for the first time in this study. The dynamics of this silicon needle formation was further revealed by employing an ultrahigh-speed camera.
Fuyuto Takahashi   +5 more
semanticscholar   +1 more source

Terahertz Chiral Metamaterials Enabling Broadband Polarization Conversion Using Polarization Guiding Effect

open access: yesAdvanced Materials Technologies, EarlyView.
A broadband terahertz polarization rotator consisting of twistingly stacked silicon–air metagratings is designed based on the polarization guiding effect and experimentally shown to achieve 90° linear polarization rotation for both TE and TM incidences.
Yun‐Seok Choi   +4 more
wiley   +1 more source

Femtosecond Demagnetization and Hot Hole Relaxation in Ferromagnetic GaMnAs

open access: yes, 2008
We have studied ultrafast photoinduced demagnetization in GaMnAs via two-color time-resolved magneto-optical Kerr spectroscopy. Below-bandgap midinfrared pump pulses strongly excite the valence band, while near-infrared probe pulses reveal sub-picosecond
B. Koopmans   +7 more
core   +1 more source

Antenna-assisted picosecond control of nanoscale phase transition in vanadium dioxide

open access: yesLight: Science & Applications, 2016
Nanoscale devices in which the interaction with light can be configured using external control signals hold great interest for next-generation optoelectronic circuits.
O. Muskens   +7 more
semanticscholar   +1 more source

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