Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Pipe Flowrate Measurement: Problem Solving

Pipe Flowrate Measurement: Problem Solving

A spray tank system is engineered to uniformly distribute a pest-control liquid across plants by using a pressurized mechanism. The tank, pressurized to 150 kPa, holds the pesticide at a height of 0.80 meters. Liquid flows from the tank through a 1.9 meter pipe with a diameter of 0.015 meters, angled at 0.698 radians, ultimately reaching a 0.007 meter nozzle that sprays the pesticide. Accurate calculation of the system's flow rate is crucial to ensure uniform application, and this is achieved...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

[Analysis of influencing factors and construction of a predictive model for permanent congenital hypothyroidism in neonates with congenital hypothyroidism].

Zhonghua yi xue za zhi·2026

Same author

[Analysis of peripheral blood monocyte subsets in chronic myelomonocytic leukemia: a single-center study].

Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi·2025

Same author

[A case of crizotinib-associated renal cysts].

Zhonghua jie he he hu xi za zhi = Zhonghua jiehe he huxi zazhi = Chinese journal of tuberculosis and respiratory diseases·2024

Same author

[Epidemiology, clinical characteristics and treatment in 278 patients with coronavirus disease 2019 in Guangzhou].

Zhonghua nei ke za zhi·2021

Same author

Multipoint vertical-Thomson scattering diagnostic on HL-2A tokamak.

The Review of scientific instruments·2018

Same author

[Immune-mediated neuropathy after allogeneic hematopoietic stem cell transplantation: one case report and literature review].

Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi·2018

Search research articles

Related Experiment Video

Updated: Jun 21, 2026

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

Eliminate coherence spike in reflection-type pump-probe measurements.

C W Luo¹, Y T Wang, F W Chen

¹Department of Electrophysics, National Chiao-Tung University, Hsinchu, Taiwan, ROC. cwluo@mail.nctu.edu.tw

|July 8, 2009

Summary

This study investigated femtosecond laser coherence spikes in indium phosphide (InP) using pump-probe measurements. Researchers demonstrated methods to effectively remove these spikes from experimental data.

More Related Videos

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

Published on: December 5, 2025

Related Experiment Videos

Last Updated: Jun 21, 2026

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

Published on: December 5, 2025

Area of Science:

Optics and Photonics
Semiconductor Physics
Materials Science

Background:

Femtosecond laser pulses are crucial for studying ultrafast phenomena in semiconductors.
Coherence spikes in pump-probe measurements can obscure underlying physical processes.
Indium phosphide (InP) is a key semiconductor material with applications in optoelectronics.

Purpose of the Study:

To systematically investigate the factors influencing coherence spike strength in InP.
To develop and demonstrate methods for removing coherence spikes from transient reflectivity data.
To improve the analysis of ultrafast dynamics in semiconductors using pump-probe spectroscopy.

Main Methods:

Reflection-type pump-probe spectroscopy was employed.
Experimental parameters including pulse polarizations, incident angles, and delay times were varied.
Time-domain measurements were used to analyze transient reflectivity changes.

Main Results:

The strength of the coherence spike was found to be highly sensitive to experimental setup parameters.
Dramatic changes in spike strength were observed by altering polarization, incident angles, and delay times.
Effective methods for removing coherence spikes were successfully demonstrated.

Conclusions:

Understanding and controlling coherence spikes is essential for accurate pump-probe measurements in semiconductors.
The demonstrated removal techniques enhance the reliability of transient reflectivity data analysis.
This work provides valuable insights for optimizing experimental designs in ultrafast spectroscopy.