Laser cleaning of solid surface: optical resonance and near-field effects

2000 ◽  
Author(s):  
Boris S. Luk'yanchuk
Keyword(s):  
Solid Surface ◽  
Near Field ◽  
Laser Cleaning ◽  
Optical Resonance ◽  
Field Effects ◽  
Surface Optical

scholarly journals OPTICAL RESONANCE AND NEAR-FIELD EFFECTS IN DRY LASER CLEANING

2002 ◽  
pp. 103-178 ◽  
Author(s):  
B. S. Luk'yanchuk ◽  
M. Mosbacher ◽  
Y. W. Zheng ◽  
H.-J. Münzer ◽  
S. M. Huang ◽  
...  
Keyword(s):  
Near Field ◽  
Laser Cleaning ◽  
Optical Resonance ◽  
Field Effects

Laser Writing of Nanostructures on Magnetic Film Surfaces With Optical Near Field Effects

2001 ◽  
Vol 697 ◽  
Author(s):  
S. M. Huang ◽  
M. H. Hong ◽  
B. S. Luk'yanchuk ◽  
W. D. Song ◽  
Y. F. Lu ◽  
...  
Keyword(s):  
Theoretical Calculations ◽  
Near Field ◽  
Resonance Effect ◽  
Field Enhancement ◽  
Magnetic Film ◽  
Original Position ◽  
Single Shot ◽  
Optical Resonance ◽  
Field Effects ◽  
Laser Fluences

AbstractLaser directly writing of nanostrucrures on magnetic film surfaces with optical near field effects has been investigated. Spherical 0.99 m or 0.47 m silica particles were placed on Cr/CoCrPt multilayers. After laser illumination with an excimer laser for a single shot, pits were obtained at the original position of the particles using different laser fluences or particle size parameters. The mechanism of the formation of nanostructure pattern was discussed and found to be the near-field optical resonance effect induced by particles on the surface. A comparison with accurate theoretical calculations of near-field light intensity distribution showed good agreement with the experiment results. The method of particle enhanced laser irradiation allows the study of field enhancement effects as well as its potential applications for nanolithography.

Optical resonance and near-field effects: applications for nanopatterning (Plenary Paper)

2004 ◽  
Author(s):  
Boris S. Luk'yanchuk ◽  
Z. B. Wang ◽  
Ming Hui Hong ◽  
Tow Chong Chong ◽  
N. Arnold
Keyword(s):  
Near Field ◽  
Optical Resonance ◽  
Field Effects

scholarly journals Optical near-field effects in surface nanostructuring and laser cleaning

2002 ◽  
Author(s):  
H.-J. Muenzer ◽  
Mario Mosbacher ◽  
M. Bertsch ◽  
Oliver Dubbers ◽  
F. Burmeister ◽  
...  
Keyword(s):  
Near Field ◽  
Laser Cleaning ◽  
Surface Nanostructuring ◽  
Field Effects

Laser Cleaning of Nanoparticles from Solid Surfaces

2001 ◽  
Vol 704 ◽  
Author(s):  
Y.F. Lu ◽  
W.Y. Zheng ◽  
L. Zhang ◽  
B. Luk'yanchuk ◽  
W.D. Song ◽  
...  
Keyword(s):  
Incident Angle ◽  
Near Field ◽  
Mie Theory ◽  
Laser Wavelength ◽  
Laser Cleaning ◽  
Experimental Result ◽  
Original Position ◽  
Material Surface ◽  
Cleaning Efficiency ◽  
Optical Resonance

AbstractThe experimental analysis of dry laser cleaning efficiency is done for certified spherical particle (SiO2, 5.0, 2.5, 1.0 and 0.5 μm) from different substrates (Si, Ge and NiP). The influence of different options (laser wavelength, incident angle, substrate properties, i.e. type of material, surface roughness, etc.) on the cleaning efficiency is presented in addition to commonly analyzed options (cleaning efficiency versus laser fluence and particle size). Found laser cleaning efficiency demonstrates a great sensitivity to some of these options (e.g. laser wavelength, angle of incidence, etc.). Partially these effects can be explained within the frame of the Mie theory of scattering. Other effects (e.g. influence of roughness) can be explained along the more complex line, related to examination of the problem “particle on the surface” beyond the Mie theory. 0.5 μm spherical silica particles were placed on Silicon (100) substrate. After laser irradiation with a 248 nm KrF excimer laser, hillocks with size of about 100 nm were obtained at the original position of the particles. Mechanism of the formation of the sub-wavelength structures were investigated and found to be the near-field optical resonance effect induced by particles on surface. Theoretical prediction of the near-field light intensity distribution was presented, which was in agreement with the experimental result.

Recent Progress On The Modeling Of Laser Surface Cleaning

2000 ◽  
Vol 617 ◽  
Author(s):  
Y.F. Lu ◽  
W. D. Song ◽  
B.S. Lukyanchuk ◽  
M.H. Hong ◽  
W.Y. Zheng
Keyword(s):  
Recent Progress ◽  
Substrate Surface ◽  
Near Field ◽  
Surface Cleaning ◽  
Laser Cleaning ◽  
Cleaning Efficiency ◽  
Optical Resonance ◽  
Near Field Effect ◽  
Substrate Surfaces

AbstractLaser cleaning has emerged to effectively remove contaminants from solid surfaces. In this paper, recent progress on laser cleaning has been studied. First, a cleaning model is established for removal of particles from substrate surfaces. The model not only explains the influence of fluence on cleaning efficiency, but also predicts the cleaning thresholds. Following that, the optical resonance and near field effect are discussed for transparent particles with a size of α ∼ λ (radiation wavelength) which strongly influences the intensity distribution in the contacted area (substrate surface). The characterization of ejected particles during laser cleaning is finally investigated. It is found that the particle distribution curves closely fit to Gaussian curve.

NEAR-FIELD EFFECTS OF RESONANT WIRE ANTENNAS

2010 ◽  
Vol 69 (18) ◽  
pp. 1615-1622
Author(s):  
R. I. Tsekhmistro ◽  
N. N. Gorobets
Keyword(s):  
Near Field ◽  
Field Effects ◽  
Wire Antennas

scholarly journals Numerical modelling of historical landslide-generated tsunamis in the French Lesser Antilles

2010 ◽  
Vol 10 (6) ◽  
pp. 1281-1292 ◽  
Author(s):  
B. Poisson ◽  
R. Pedreros
Keyword(s):  
Near Field ◽  
Pyroclastic Flows ◽  
Lesser Antilles ◽  
Published Data ◽  
Tsunami Height ◽  
Tsunami Modelling ◽  
Field Effects ◽  
Wave Heights ◽  
Unique Source ◽  
Height Data

Abstract. Two historical landslide-induced tsunamis that reached the coasts of the French Lesser Antilles are studied. First, the Martinique coast was hit by a tsunami down the western flank of Montagne Pelée at the beginning of the big eruption of May 1902. More recently, the northeastern coast of Guadeloupe was affected by a tsunami that had been generated around Montserrat by pyroclastic flows entering the sea, during the July 2003 eruption of the Soufrière Hills volcano. We use a modified version of the GEOWAVE model to compute numerical simulations of both events. Two source hypotheses are considered for each tsunami. The comparison of the simulation results with reported tsunami height data helps to discriminate between the tested source decriptions. In the Martinique case, we obtain a better fit to data when considering three successive lahars entering the sea, as a simplified single source leads to an overstimation of the tsunami wave heights at the coast. In the Montserrat case, the best model uses a unique source which volume corresponds to published data concerning the peak volume flow. These findings emphasize the importance of an accurate description of the relevant volume as well as the timing sequence of the source event in landslide-generated tsunami modelling. They also show that considering far-field effects in addition to near-field effects may significantly improve tsunami modelling.

Near-field and far-field effects in thermal radiation from metallic carbon nanotubes

2007 ◽  
Author(s):  
Andrei M. Nemilentsau ◽  
Gregory Ya. Slepyan ◽  
Sergey A. Maksimenko
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Radiation ◽  
Near Field ◽  
Far Field ◽  
Field Effects

Analysis of nanopatterning through near field effects with femtosecond and nanosecond lasers on semiconducting and metallic targets

2010 ◽  
Vol 107 (7) ◽  
pp. 074305 ◽  
Author(s):  
Vijay M. Sundaram ◽  
Alok Soni ◽  
Richard E. Russo ◽  
Sy-Bor Wen
Keyword(s):  
Near Field ◽  
Field Effects ◽  
Nanosecond Lasers
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