Observation of negative pulse delay in a microsphere

2006 ◽  
Author(s):  
Kouki Totsuka ◽  
Makoto Tomita
Keyword(s):  
Negative Pulse ◽  
Pulse Delay

scholarly journals Electric Field Assisted Femtosecond Laser Preparation of Au@TiO2 Composites with Controlled Morphology and Crystallinity for Photocatalytic Degradation

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3816
Author(s):  
Xiaojie Li ◽  
Xin Li ◽  
Pei Zuo ◽  
Xiaozhe Chen ◽  
Misheng Liang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Electric Field ◽  
Photocatalytic Degradation ◽  
Au Nanoparticles ◽  
High Efficiency ◽  
Free Electron Density ◽  
Pulse Delay ◽  
Dye Pollutants ◽  
Amorphous Tio2 ◽  
Laser Liquid

TiO2 is popular in photocatalytic degradation dye pollutants due to its abundance and its stability under photochemical conditions. Au loaded TiO2 can achieve efficient absorption of visible light and deal with the problem of low conversion efficiency for solar energy of TiO2. This work presents a new strategy to prepare Au nanoparticles-loaded TiO2 composites through electric−field−assisted temporally−shaped femtosecond laser liquid-phase ablation of Au3+ and amorphous TiO2. By adjusting the laser pulse delay and electric field parameters, gold nanoparticles with different structures can be obtained, such as nanospheres, nanoclusters, and nanostars (AuNSs). AuNSs can promote the local crystallization of amorphous TiO2 in the preparation process and higher free electron density can also be excited to work together with the mixed crystalline phase, hindering the recombination between carriers and holes to achieve efficient photocatalytic degradation. The methylene blue can be effectively degraded by 86% within 30 min, and much higher than the 10% of Au nanoparticles loaded amorphous TiO2. Moreover, the present study reveals the crystallization process and control methods for preparing nanoparticles by laser liquid ablation, providing a green and effective new method for the preparation of high-efficiency photocatalytic materials.

A robust pulse delay circuit utilizing a differential buffer ring

2010 ◽  
Author(s):  
Jaehyun Jeong ◽  
Tetsuya Iizuka ◽  
Toru Nakura ◽  
Makoto Ikeda ◽  
Kunihiro Asada
Keyword(s):  
Pulse Delay ◽  
Delay Circuit

Double-pulse femtosecond laser peening of aluminum alloy AA5038: Effect of inter-pulse delay on transient optical plume emission and final surface micro-hardness

2016 ◽  
Vol 109 (21) ◽  
pp. 211902 ◽  
Author(s):  
E. I. Ageev ◽  
V. Yu. Bychenkov ◽  
A. A. Ionin ◽  
S. I. Kudryashov ◽  
A. A. Petrov ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Femtosecond Laser ◽  
Double Pulse ◽  
Laser Peening ◽  
Micro Hardness ◽  
Pulse Delay ◽  
Final Surface ◽  
Plume Emission

An Ultrasound Transducer by Lead Zirconate Titanate (PZT) Nanofibers

2011 ◽  
Author(s):  
Guitao Zhang ◽  
Yong Shi
Keyword(s):  
Lead Zirconate Titanate ◽  
Acoustic Waves ◽  
Average Diameter ◽  
Lead Zirconate ◽  
Ultrasound Transducer ◽  
Resonant Frequencies ◽  
Pulse Delay ◽  
Zirconate Titanate ◽  
Electrospinning Method ◽  
Assumed Mode

In this paper, we demonstrate Lead zirconate titanate (PZT) nanofibers as a transducer to generate and detect ultrasound acoustic waves. PZT nanofibers with average diameter of 102nm were fabricated by the electrospinning method. The as-fabricated nanofibers were collected and aligned across a 10 μm silicon trench with Au electrodes. After annealing, the device was tested with the pulse/delay method. Two resonant frequencies, 8 MHz and 13MHz, were detected respectively. By using the Hamilton’s principle for coupled electromechanical systems with properly assumed mode shape, the resonant frequency was caudated. Base on the current testing result, a broadband ultrasound transducer was envisioned.

Active gate driving technique for series connecting SiC MOSFETs in the presence of gate pulse delay mismatch

2021 ◽  
pp. 1-1
Author(s):  
Vamshi Krishna Miryala ◽  
Saravanan Dhanasekaran ◽  
Ganesh P ◽  
Kamalesh Hatua ◽  
Subhashish Bhattacharya
Keyword(s):  
Pulse Delay ◽  
Gate Pulse ◽  
Gate Driving

Pulse Delay Effects in the He–Ne Laser Mode‐Locked by a Ne Absorption Cell

1969 ◽  
Vol 40 (10) ◽  
pp. 3969-3972 ◽  
Author(s):  
A. Frova ◽  
M. A. Duguay ◽  
C. G. B. Garrett ◽  
S. L. McCall
Keyword(s):  
Absorption Cell ◽  
Laser Mode ◽  
Pulse Delay ◽  
Delay Effects
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