Results 41 to 50 of about 5,782,871 (345)

Towards redistribution laser cooling of molecular gases: Production of candidate molecules SrH by laser ablation [PDF]

open access: yes, 2013
Laser cooling by collisional redistribution of radiation has been successfully applied in the past for cooling dense atomic gases. Here we report on progress of work aiming at the demonstration of redistribution laser cooling in a molecular gas.
Moroshkin, Peter   +4 more
core   +1 more source

Gold nanoparticles: Optical properties and implementations in cancer diagnosis and photothermal therapy

open access: yesJournal of Advanced Research, 2010
Currently a popular area in nanomedicine is the implementation of plasmonic gold nanoparticles for cancer diagnosis and photothermal therapy, attributed to the intriguing optical properties of the nanoparticles.
Xiaohua Huang, Mostafa A. El-Sayed
doaj   +1 more source

Realization of nearly dispersionless bands with strong orbital anisotropy from destructive interference in twisted bilayer MoS2

open access: yesNature Communications, 2021
Twisted van der Waals systems are known to host flat electronic bands, originating from moire potential. Here, the authors predict from purely geometric considerations a new type of nearly dispersionless bands in twisted bilayer MoS2, resulting from ...
Lede Xian   +6 more
doaj   +1 more source

Ab Initio Simulation of Attosecond Transient Absorption Spectroscopy in Two-Dimensional Materials

open access: yesApplied Sciences, 2018
We extend the first-principles analysis of attosecond transient absorption spectroscopy to two-dimensional materials. As an example of two-dimensional materials, we apply the analysis to monolayer hexagonal boron nitride (h-BN) and compute its transient ...
Shunsuke A. Sato   +3 more
doaj   +1 more source

Bubble Dynamics in Laser Lithotripsy [PDF]

open access: yesJournal of Physics: Conference Series, 2015
Laser lithotripsy is a medical procedure for fragmentation of urinary stones with a fiber guided laser pulse of several hundred microseconds long. Using high-speed photography, we present an in-vitro study of bubble dynamics and stone motion induced by Ho:YAG laser lithotripsy.
Mohammadzadeh, Milad   +2 more
openaire   +2 more sources

Phase noise characteristics of microwave signals generated by semiconductor laser dynamics.

open access: yesOptics Express, 2015
Phase noise of the period-one (P1) nonlinear dynamical oscillation in an optically injected semiconductor laser is numerically investigated. The P1 dynamics causes the laser output intensity to oscillate at a widely tunable frequency for photonic ...
J. Zhuang, Sze-Chun Chan
semanticscholar   +1 more source

Entanglement control in hybrid optomechanical systems [PDF]

open access: yes, 2012
We demonstrate the control of entanglement in a hybrid optomechanical system comprising an optical cavity with a mechanical end-mirror and an intracavity Bose-Einstein condensate (BEC).
De Chiara, G.   +3 more
core   +2 more sources

Keyhole fluctuation and pore formation mechanisms during laser powder bed fusion additive manufacturing

open access: yesNature Communications, 2021
Keyhole porosity is a key concern in laser powder-bed fusion (LPBF), potentially impacting component fatigue life. However, some keyhole porosity formation mechanisms, e.g., keyhole fluctuation, collapse and bubble growth and shrinkage, remain unclear ...
Yuze Huang   +7 more
semanticscholar   +1 more source

Achieving Long Distance Sensing Using Semiconductor Laser with Optical Feedback by Operating at Switching Status

open access: yesSensors, 2022
In this study, a novel distance sensing method is presented by using a semiconductor laser (SL) with optical feedback (OF) and operating the SL at a switching status happened between two nonlinear dynamic states (stable state and period-one state).
Bairun Nie   +7 more
doaj   +1 more source

Comprehensive experimental analysis of nonlinear dynamics in an optically-injected semiconductor laser [PDF]

open access: yes, 2011
We present the first comprehensive experimental study, to our knowledge, of the routes between nonlinear dynamics induced in a semiconductor laser under external optical injection based on an analysis of time-averaged measurements of the optical and RF ...
Adams, Michael J   +3 more
core   +2 more sources

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