Results 261 to 270 of about 63,154 (299)

Gigahertz photothermal effect in silicon waveguides

Applied Physics Letters, 2008
We present a theoretical and experimental study of the frequency response of the photothermal effect in silicon waveguides. The effect is studied for modulation frequencies up to 3GHz using integrated photonic circuits in Mach–Zehnder and ring oscillator configurations.
W. H. P. Pernice, Mo Li, H. X. Tang
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Adaptive Beam Shaping using Photothermal Effects

Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, 2009
We present an experimental demonstration of adaptive beam shaping via heat induced photothermal effects in optical elements. One application of the proposed system is for correction of astigmatic thermal aberrations in high power laser systems.
Muzammil A. Arain, William Z. Korth, Guido Mueller, D. B. Tanner, D. H. Reitze   +4 more
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Enhanced Photothermal Effect in Si Nanowires

Nano Letters, 2003
Si nanowires synthesized by the thermal evaporation of a silicon monoxide powder or a mixture of silicon and silica powders burned fiercely in air and exhibited a large photoacoustic effect when exposed to a conventional photographic flash. The energy required to ignite the Si nanowires was 0.1−0.2 J/cm2. Si nanowires showed a strong ability to confine
Wang, N., Yao, BD, Chan, YF, Zhang, XY
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Nanowelding through plasmonic enhanced photothermal effects

2015 17th International Conference on Transparent Optical Networks (ICTON), 2015
Single point nanowelding (SPNW) of nanowires is highly demanded for functional electronics and photonics devices while it is difficult to be realized due to small footprints of nanowires and controlling the localized heat generation. Here we review our recent work on the precise control of SPNW of silver nanowires, where the nanowelding is induced ...
null Min Qiu, null Shuowei Dai, null Guoping Liu, null Hangbo Yang, null Yuanqing Yang, null Ding Zhao, null Wei Wang, null Qiang Li   +7 more
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Review of Some Photothermal Effects

1996
When a laser beam passes through a lossy material, the absorbed energy produces thrmal gradients, which in turn produce gradients of refractive index. There may then occur a variety of effects including focusing or defocusing (thermal lense effects), beam distortion, self-phase modulation, or generation of acoustic waves.
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Plasmonic Nanohybrid with High Photothermal Conversion Efficiency for Simultaneously Effective Antibacterial/Anticancer Photothermal Therapy

ACS Applied Bio Materials, 2019
Plasmonic metal/semiconductor nanohybrids hold great promise in photocatalysis and biosensor development; however, their potential phototherapeutic applications are yet fully unexplored. On the other hand, the demand of high laser power density to induce antibacterial photothermal therapeutic effects greatly restricts the practical applicability of the
Muhammad Rizwan Younis, Rui Bing An, Yun-Chao Yin, Shouju Wang, Deju Ye, Xing-Hua Xia   +5 more
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Photothermal effect and application of photothermal materials in photocatalysis and photoelectric catalysis

Microstructures
Photocatalysis (PC) and photoelectric catalysis (PEC) are environmental protection technologies that use sunlight capacity and environmental governance, and they have a wide range of applications in hydrogen production, carbon dioxide reduction, organic degradation, and other fields.
Jingnan Zhang, Tongxin Tang, Rongge Yang, Guilin Wang, Kai-Hang Ye, Jianxin Shi   +5 more
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Acceptor-donor-acceptor type organic photothermal agents with enhanced NIR absorption and photothermal conversion effect for cancer photothermal therapy

Talanta
Numerous photothermal agents (PTAs) require high-intensity and long-duration laser excitation for photothermal therapy (PTT), resulting in light damage to healthy skin and tissue as well as limiting their biomedical applications. Integrating desirable near-infrared (NIR) absorption and high photothermal conversion efficiency (PCE) into a single small ...
Mengxin Sun, Xilin Zhao, Xiaohan Cao, Xiaoyu Li, Jiashuai Xu, Xiangtai Meng, Hongguang Lu, Xiaowei Zhao   +7 more
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Photoacoustic Spectroscopy — Photoacoustic and Photothermal Effects

1990
Definition. Photoacoustic (PA) or optoacoustic measurements in the original, strict sense comprise the detection of acoustic waves which arise from non-radiative de-excitation (radiationless transition) of the sample as a consequence of absorption of continuously amplitude-modulated light.
C. Buschmann, H. Prehn
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Industrial applications of the photothermal effect

SPIE Proceedings, 1990
Photothermal techniques use optically induced heat fluxes to probe the optical and thermal properties of materials. The techniques can be used for spectroscopy, measurement of thermal parameters, non-destructive evaluation, energy transfer studies and spectroscopic depth profiling. A large literature on the various photothermal techniques and their
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