Beam geometry optimization in dual-beam thermal lensing spectrometry

1985 ◽  
Vol 57 (7) ◽  
pp. 1216-1219 ◽  
Author(s):  
Thierry. Berthoud ◽  
Nathalie. Delorme ◽  
Patrick. Mauchien
Keyword(s):  
Geometry Optimization ◽  
Thermal Lensing ◽  
Beam Geometry ◽  
Dual Beam

scholarly journals Thermal Lensing Spectroscopy With Picosecond Pulse Trains and a New Dual Beam Configuration

1982 ◽  
Vol 1 (1) ◽  
pp. 9-15 ◽  
Author(s):  
J. W. Perry ◽  
E. A. Ryabov ◽  
A. H. Zewail
Keyword(s):  
Picosecond Pulse ◽  
Thermal Lensing ◽  
Pulse Trains ◽  
Dual Beam

Green Synthesized Plasmonic Silver Systems for Potential Non-Linear Optical Applications: Optical Limiting and Dual Beam Mode Matched Thermal Lensing

2019 ◽  
Vol 72 (6) ◽  
pp. 460 ◽  
Author(s):  
Jeena Thomas ◽  
Prakash Perikaruppan ◽  
Vinoy Thomas ◽  
Jancy John ◽  
Raji Mary Mathew ◽  
...  
Keyword(s):  
Bioactive Compound ◽  
Optical Limiting ◽  
Thermal Lensing ◽  
Optical Parameters ◽  
Dual Beam ◽  
Optic Property ◽  
Non Linear ◽  
Linear Optical ◽  
Beam Mode ◽  
Limiting Threshold

Bioactive compound functionalized plasmonic systems are evolving as a promising branch of nanotechnology. In this communication the synthesis of bioactive compound mimosine-based silver nanoparticles (AgNPs) and their non-linear optical and thermo-optic properties are presented. UV-Visible spectroscopy, optical bandgap measurement, fluorescence spectroscopy, and high-resolution transmission electron microscopy (HRTEM) techniques were used to characterize the synthesized AgNPs. An open aperture z-scan technique was used to determine the non-linear optical parameters. A very strong reverse saturable absorption (RSA) and low optical limiting threshold were observed for the present mimosine decorated AgNP system. The thermo-optic property of the present system was evaluated using a highly sensitive dual beam mode matched thermal lensing spectroscopic technique. A comparison of the low limiting threshold (242MWcm−2) and thermo-optic property (thermal diffusivity, D=1.13×10−7m2s−1) with similar systems proves its capability for non-linear optical and thermo-optic applications.

Differential Dual-Beam Thermal Lensing Spectrometry: Determination of Lanthanides

1987 ◽  
Vol 41 (1) ◽  
pp. 15-19 ◽  
Author(s):  
Thierry Berthoud ◽  
Nathalie Delorme
Keyword(s):  
Index Of Refraction ◽  
Lanthanide Ions ◽  
Thermal Lensing ◽  
Excitation Beam ◽  
Dual Beam ◽  
Carbonate Medium ◽  
Excitation Laser ◽  
Lensing Effect ◽  
Thermal Lensing Effect

This paper describes a differential dual-beam thermal lensing setup which involves two continuous lasers and two cells placed one just behind the other on the beampath. A tunable excitation laser creates the thermal lensing effect in the two cells, whereas the (He-Ne) laser, colinear to the excitation beam, probes the variation of the index of refraction due to the absorption in each cell. The differential response is achieved by placing the solvent in the first cell and the solvent with analyte in the second cell. The positions of the two cuvettes are optimized in order to maximize differential thermal lensing effect detection. This differential instrument allows compensation of 95–98% of the thermal lensing solvent effect. Thermal lensing spectra of two lanthanide ions (Nd3+, Pr3+), both in no complexing solution (HClO4) and in carbonate medium, are discussed. Analytical determinations of these elements with detection limits in the range of 10−6 mole per liter are observed.

Nonlinear optical limiting and dual beam mode matched thermal lensing of nano fluids containing green synthesized copper nanoparticles

2019 ◽  
Vol 279 ◽  
pp. 63-66 ◽  
Author(s):  
Jancy John ◽  
Raji Mary Mathew ◽  
I. Rejeena ◽  
R. Jayakrishnan ◽  
S. Mathew ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Nonlinear Optical ◽  
Optical Limiting ◽  
Thermal Lensing ◽  
Dual Beam ◽  
Beam Mode ◽  
Nano Fluids

Mechanical nanogap switch for low-power on-board electronics

2014 ◽  
Vol 7 (5) ◽  
pp. 515-520
Author(s):  
Achref Yahiaoui ◽  
Emilien Lemoine ◽  
Arnaud Pothier ◽  
Pierre Blondy
Keyword(s):  
Contact Force ◽  
Figure Of Merit ◽  
Rf Mems ◽  
Actuation Voltage ◽  
Geometry Optimization ◽  
Good Reliability ◽  
Beam Geometry ◽  
Scaling Down ◽  
Contact Switch ◽  
High Contact Force

This paper presents the design fabrication and measurement of a nanogap radio frequency microelectromechanical system (RF MEMS) metal-contact switch. The prosed device generates a relatively high contact force with a low actuation voltage using a dielectric layer between the actuation electrode and the moveable beam. The actuation voltage is decreased with good reliability of the device by scaling down the gap. Beam geometry optimization allowed reaching 126 micronewtons contact force with only 10 V bias voltage. The fabricated miniature switch (80 × 50 × 0.95 µm) has indeed a pull-down voltage of 6 V and a contact resistance <2 Ω with 10 V bias applied. By measuring the S-parameters, the up-state capacitance has been fitted to 22 fF. The remarkable figure-of-merit Ron × Cup = 44 fs reflects the good performance of the device. A cycling test showed the device operated for 90 min without any charging problem noted.

Molecular and Atomic Beam Geometry Optimization

1967 ◽  
Author(s):  
J. DePrins ◽  
P.J. Wauters ◽  
S.G. Andresen
Keyword(s):  
Atomic Beam ◽  
Geometry Optimization ◽  
Beam Geometry

Flexible dual-beam geometry for advanced optical micromanipulation experiments

2010 ◽  
Author(s):  
Oto Brzobohatý ◽  
Tomáš Čižmár ◽  
Kishan Dholakia ◽  
Pavel Zemánek
Keyword(s):  
Beam Geometry ◽  
Dual Beam

GEOMETRY OPTIMIZATION OF AIR-ASSISTED SWIRL NOZZLE BASED ON SURROGATE MODELS AND COMPUTATIONAL FLUID DYNAMICS

2019 ◽  
Vol 29 (7) ◽  
pp. 605-628
Author(s):  
Zongli Yi ◽  
Li Hou ◽  
Qi Zhang ◽  
Yousheng Wang ◽  
Yunxia You
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Geometry Optimization ◽  
Surrogate Models
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