Absolute Measurement of Femtosecond Pump–Probe Signal Strength

2013 ◽  
Vol 117 (29) ◽  
pp. 6332-6345 ◽  
Author(s):  
Byungmoon Cho ◽  
Vivek Tiwari ◽  
Robert J. Hill ◽  
William K. Peters ◽  
Trevor L. Courtney ◽  
...  
Keyword(s):  
Signal Strength ◽  
Absolute Measurement ◽  
Probe Signal ◽  
Pump Probe

scholarly journals Giant Photoluminescence Enhancement and Carrier Dynamics in MoS2 Bilayers with Anomalous Interlayer Coupling

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1994
Author(s):  
Han Li ◽  
Yating Ma ◽  
Zhongjie Xu ◽  
Xiang’ai Cheng ◽  
Tian Jiang
Keyword(s):  
Optical Properties ◽  
Transition Metal Dichalcogenides ◽  
Interlayer Coupling ◽  
Carrier Dynamics ◽  
Probe Signal ◽  
Exciton Resonance ◽  
Pump Probe ◽  
Metal Dichalcogenides ◽  
Photoluminescence Enhancement ◽  
Probe Measurements

Fundamental researches and explorations based on transition metal dichalcogenides (TMDCs) mainly focus on their monolayer counterparts, where optical densities are limited owing to the atomic monolayer thickness. Photoluminescence (PL) yield in bilayer TMDCs is much suppressed owing to indirect-bandgap properties. Here, optical properties are explored in artificially twisted bilayers of molybdenum disulfide (MoS2). Anomalous interlayer coupling and resultant giant PL enhancement are firstly observed in MoS2 bilayers, related to the suspension of the top layer material and independent of twisted angle. Moreover, carrier dynamics in MoS2 bilayers with anomalous interlayer coupling are revealed with pump-probe measurements, and the secondary rising behavior in pump-probe signal of B-exciton resonance, originating from valley depolarization of A-exciton, is firstly reported and discussed in this work. These results lay the groundwork for future advancement and applications beyond TMDCs monolayers.

scholarly journals Thermal Models for Determining Thermal Conductivity and Thermal Boundary Conductance Using Pump-Probe Thermoreflectance Techniques

2009 ◽  
Author(s):  
Patrick E. Hopkins ◽  
Justin R. Serrano ◽  
Leslie M. Phinney
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Probe Signal ◽  
Pump Probe ◽  
Thermal Models ◽  
Thermal Boundary Conductance ◽  
Advantages And Disadvantages ◽  
Heating Event ◽  
Lock In ◽  
Thermal Conductivity Λ

Pump-probe transient thermoreflectance (TTR) techniques are powerful tools for measuring thermophysical properties of thin films, such as thermal conductivity, Λ, or thermal boundary conductance, G. TTR experimental setups rely on lock-in techniques to detect the response of the probe signal relative to the pump heating event. The temporal decays of the lock-in signal are then compared to thermal models to deduce the Λ and G in and across various materials. There are currently two thermal models that are used to relate the measured signals from the lock-in to the Λ and G in the sample of interest. In this work, the thermal models, their assumptions, and their ranges of applicability are compared. The advantages and disadvantages of each technique are elucidated from the results of the thermophysical property measurements.

Ultrafast pump-probe signal detection using a data acquisition card

2018 ◽  
Vol 13 (10) ◽  
pp. P10027-P10027 ◽  
Author(s):  
C. Sahoo ◽  
M. Sethupathy ◽  
Nabil A. Saad ◽  
D. Narayana Rao ◽  
Sri Ram G. Naraharisetty
Keyword(s):  
Signal Detection ◽  
Data Acquisition ◽  
Probe Signal ◽  
Pump Probe ◽  
Data Acquisition Card

scholarly journals Pulsed laser noise analysis and pump-probe signal detection with a data acquisition card

2011 ◽  
Vol 82 (12) ◽  
pp. 123108 ◽  
Author(s):  
Christopher A. Werley ◽  
Stephanie M. Teo ◽  
Keith A. Nelson
Keyword(s):  
Signal Detection ◽  
Data Acquisition ◽  
Noise Analysis ◽  
Pulsed Laser ◽  
Probe Signal ◽  
Pump Probe ◽  
Laser Noise ◽  
Data Acquisition Card

Absolute Measurement of Signal Strength on Magnetic Recordings

1955 ◽  
Vol 64 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Robert Schwartz ◽  
Sheldon I. Wilpon ◽  
Frank A. Comerci
Keyword(s):  
Signal Strength ◽  
Absolute Measurement

Phenomenological Model for Understanding the Pump-probe Signal Observed in LaMnO$_3$

2011 ◽  
Vol 61 (12) ◽  
pp. 1156-1162
Author(s):  
Myung-Whun KIM ◽  
Jin Seung KIM*
Keyword(s):  
Phenomenological Model ◽  
Probe Signal ◽  
Pump Probe

scholarly journals Thin Magnetically Permeable Targets for Inductive Sensing: Application to Limb Prosthetics

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 4041 ◽  
Author(s):  
Ethan J. Weathersby ◽  
Clement J. Gurrey ◽  
Jake B. McLean ◽  
Benjamin N. Sanders ◽  
Brian G. Larsen ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Signal Strength ◽  
Absolute Measurement ◽  
Target Volume ◽  
Thin Disk ◽  
Calibration Coefficient ◽  
High Signal ◽  
Durability Testing ◽  
Sensing Application ◽  
Inductive Sensors

The purpose of this research was to create a thin ferrous polymer composite to be used as a target for inductive sensing in limb prosthetics. Inductive sensors are used to monitor limb-to-socket distance in prosthetic sockets, which reflects socket fit. A styrene–ethylene–ethylene/propylene–styrene (SEEPS) polymer was mixed with iron powder at three concentrations (75, 77, 85 wt%), and thin disk-shaped samples were fabricated (0.50, 0,75, 1.00 mm thickness). For 85 wt% samples of 0.50 mm thickness, which proved the best combination of high signal strength and low target volume, inductive sensor sensitivity ranged from 3.2E5 counts/mm at 0.00–1.00 mm distances to 7.2E4 counts/mm at 4.00–5.00 mm distances. The application of compressive stress (up to 425 kPa) introduced an absolute measurement error of less than 3.3 μm. Tensile elasticity was 282 kPa, which is comparable to that of commercial elastomeric liners. Durability testing in the shoe of an able-bodied participant demonstrated a change in calibration coefficient of less than 3.8% over two weeks of wear. The ferrous polymer composite may facilitate the development of automatically adjusting sockets that use limb-to-socket distance measurement for feedback control.

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