Articles2018-03-21T00:53:58+00:00

Articles

Synchronization of a 25 MHz Magellan Yb-doped Fiber Oscillator with a Streak Camera from Optronis

Clark-MXR, Inc. is pleased to announce the first demonstration of a Yb-doped femtosecond fiber oscillator running at 25 MHz successfully synchronized with a Streak camera. This is a result from a collaboration with the companies Optronis GmbH (Dr. Patrick Summ, summ@optronis.com) and Horiba Scientific GmbH (Dr. Hans-Erik Swoboda hans-erik.swoboda@horiba.com) from Europe. The Magellan is a telecom-qualified single emitter diode-pumped Yb-doped femtosecond fiber oscillator. A Streak camera from Optronis, Optoscope SC10, with Synchroscan sweep unit was triggered by the Magellan oscillator and different triggering set-ups were tested for best [...]

By |Jan 16, 2017|

Observation of Rapid Exciton–Exciton Annihilation in Monolayer Molybdenum Disulfide

A  publication from Prof. Tony Heinz group with Model IMPULSE from Clark-MXR. Dezheng Sun, Yi Rao, Georg A. Reider, Gugang Chen, Yumeng You, Louis Brézin, Avetik R. Harutyunyan, and Tony F. Heinz Monolayer MoS2 is a direct-gap two-dimensional semiconductor that exhibits strong electron–hole interactions, leading to the formation of stable excitons and trions. Here we report the existence of efficient exciton–exciton annihilation, a four-body interaction, in this material. Exciton–exciton annihilation was identified experimentally in ultrafast transient absorption measurements through the emergence of a decay channel varying quadratically with [...]

By |Sep 9, 2016|

Mapping Carrier Dynamics on Material Surfaces in Space and Time using Scanning Ultrafast Electron Microscopy

Re-published from The Journal of Physical Chemistry Letters Jingya Sun, Aniruddha Adhikari, Basamat S. Shaheen, Haoze Yang, and Omar F. Mohammed* Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia ABSTRACT: Selectively capturing the ultrafast dynamics of charge carriers on materials surfaces and at interfaces is crucial to the design of solar cells and optoelectronic devices. Despite extensive research efforts over the past few decades, information and understanding about surface-dynamical processes, including [...]

By |Mar 18, 2016|

Time-resolved Photoemission Study of the Electronic Structure and Dynamics of Chemisorbed Alkali Atoms on Ru(0001)

Clark-MXR Product:  Model IMPULSE Shengmin Zhang, Cong Wang, Xuefeng Cui, Yanan Wang, Adam Argondizzo, Jin Zhao, and Hrvoje Petek Department of Physics and Astronomy and Pittsburgh Quantum Institute, University of Pittsburgh, & Department of Physics and ICQD/Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei,  China. We investigate the electronic structure and photoexcitation dynamics of alkali atoms (Rb and Cs) chemisorbed on transition-metal Ru(0001) single-crystal surface by angle- and time-resolved multiphoton photoemission. Three- and four-photon photoemission (3PP and 4PP) spectroscopic features [...]

By |Mar 16, 2016|

DNA Extraction from Geological Samples Assisted with Clark-MXR Femtosecond Laser Micromachining Technology

Traditional techniques used to extract DNA from thin sections of rock samples for amplification and analysis will often introduce contamination from the surrounding material. This is especially true when extracting microscopic inclusion in the presence of nearby unwanted materials. Our femtosecond laser micromachining capability offers a way to address these critical concerns. This image shows a cylinder machined in a thin layer of a rock. The inclusion is isolated with negligible damage to either the center section or the surrounding area. And so that the trapped bio-matter in [...]

By |Feb 11, 2016|

Real-Space Imaging of Carrier Dynamics of Materials Surfaces by Second-Generation Four-Dimensional Scanning Ultrafast Electron Microscopy – Republish

Republished from Imaging of Carrier Dynamics by Second-Generation 4D Scanning UEM enabled by Model IMPULSE from Clark-MXR. A new publication from Prof. Omar Abdelsaboor group at KAUST Jingya Sun, Vasily A. Melnikov, Jafar I. Khan, and Omar F. Mohammed Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia Abstract In the fields of photocatalysis and photovoltaics, ultrafast dynamical processes, including carrier trapping and recombination on material surfaces, are among the key [...]

By |Oct 5, 2015|

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