scholarly journals Nanoscale Probing of Thermal, Stress, and Optical Fields under Near-Field Laser Heating

PLoS ONE ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. e58030 ◽  
Author(s):  
Xiaoduan Tang ◽  
Shen Xu ◽  
Xinwei Wang
Keyword(s):  
Thermal Stress ◽  
Laser Heating ◽  
Near Field ◽  
Optical Fields

scholarly journals Laser heating of scanning probe tips for thermal near-field spectroscopy and imaging

APL Photonics ◽  
2017 ◽  
Vol 2 (2) ◽  
pp. 021301 ◽  
Author(s):  
Brian T. O’Callahan ◽  
Markus B. Raschke
Keyword(s):  
Laser Heating ◽  
Near Field ◽  
Scanning Probe ◽  
Field Spectroscopy

Numerical Modeling and Mechanism Analysis of Hybrid Heating and Shock Process for Laser-Assisted Laser Peen Forming

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Mingsheng Luo ◽  
Yongxiang Hu ◽  
Dong Qian ◽  
Zhenqiang Yao
Keyword(s):  
Thermal Stress ◽  
Laser Heating ◽  
Laser Peening ◽  
Mechanism Analysis ◽  
Coupled Modeling ◽  
Bending Deformation ◽  
Peen Forming ◽  
Effects Of Temperature ◽  
Capability Improvement ◽  
Thermoelastic Plastic

Laser-assisted laser peen forming (LALPF) is proposed as a hybrid process to combine laser heating and laser peening to improve the bending capability of laser peen forming (LPF) effectively. To predict LALPF-induced bending deformation and mechanism of bending capability improvement, a sequentially coupled modeling approach is established by integrating three models, i.e., a thermoelastic-plastic model to predict the temperature, a dynamic model to obtain the eigenstrain of laser shock, and an eigenstrain model to predict the bending deformation. The effects of temperature, thermal stress, and thermal plastic strain of laser heating and the coupling effects on the bending deformation were investigated. The results show that the interaction of temperature and thermal stress are the dominant factors contributing to the improvement of bending capability.

scholarly journals Sub-wavelength temperature probing in near-field laser heating by particles

2012 ◽  
Vol 20 (13) ◽  
pp. 14152 ◽  
Author(s):  
Xiaoduan Tang ◽  
Yanan Yue ◽  
Xiangwen Chen ◽  
Xinwei Wang
Keyword(s):  
Laser Heating ◽  
Near Field ◽  
Sub Wavelength

Thermal Stress Associated With Non-Fourier Heat Conduction in Femtosecond Laser Heating of Multilayer Metallic Films

2018 ◽  
Author(s):  
Swarup Bag ◽  
M. Ruhul Amin
Keyword(s):  
Thin Film ◽  
Heat Conduction ◽  
Thermal Stress ◽  
Temperature Distribution ◽  
Pulse Laser ◽  
Laser Heating ◽  
Laser Source ◽  
Phase Lag ◽  
Dual Phase ◽  
Fourier Heat Conduction

In the present work, the deformation behavior in metallic film subjected to ultra-short laser heating is investigated. Static thermo-elastic behavior is predicted for 100 nm thin film of either single layer or multiple layers. The temperature distribution is estimated from dual-phase lag non-Fourier heat conduction model. The maximum temperature after single pulse is achieved 730 K. The temperature profile for this pulse laser is used to compute elastic stress and distortion field following the minimization of potential energy of the system. In the present work, the simulation has been proposed by developing 3D finite element based coupled thermo-elastic model using dual phase lag effect. The experimental basis of transient temperature distribution in ultra-short pulse laser is extremely difficult or nearly impossible, the model results have been validated with literature reported thermal results. Since the temperature distribution due to pulse laser source varies with time, the stress analysis is performed in incremental mode. Hence, a sequentially coupled thermo-mechanical model is developed that is synchronized between thermal and mechanical analysis in each time steps of transient problem. The maximum equivalent stress is achieved 0.3 GPa. Numerical results show that the predicted thermal stress may exceeds the tensile strength of the material and may lead to crack or damage the thin film.

scholarly journals Tailoring optical complex fields with nano-metallic surfaces

Nanophotonics ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 2-25 ◽  
Author(s):  
Guanghao Rui ◽  
Qiwen Zhan
Keyword(s):  
Near Field ◽  
Photonic Devices ◽  
Metallic Surface ◽  
Strong Interactions ◽  
Metallic Surfaces ◽  
Optical Fields ◽  
Recent Developments ◽  
Quantum Optical ◽  
Light Beams ◽  
Made In

AbstractRecently there is an increasing interest in complex optical fields with spatially inhomogeneous state of polarizations and optical singularities. Novel effects and phenomena have been predicted and observed for light beams with these unconventional states. Nanostructured metallic thin film offers unique opportunities to generate, manipulate and detect these novel fields. Strong interactions between nano-metallic surfaces and complex optical fields enable the development of highly compact and versatile functional devices and systems. In this review, we first briefly summarize the recent developments in complex optical fields. Various nano-metallic surface designs that can produce and manipulate complex optical fields with tailored characteristics in the optical far field will be presented. Nano-metallic surfaces are also proven to be very effective for receiving and detection of complex optical fields in the near field. Advances made in this nascent field may enable the design of novel photonic devices and systems for a variety of applications such as quantum optical information processing and integrated photonic circuits.

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