The Influence of an Inactive Layer on the Photoacoustic Spectra. Mirosław Maliński Faculty of Electronics Technical University of Koszalin Poland.

Slides:

Advertisements

Similar presentations

Scanning tunnelling spectroscopy

Advertisements

Technická univerzita v Liberci Magnetic Field of Massive Conductor at Low Frequency Martin Truhlá ř Faculty of Mechatronics, Informatics and Interdisciplinary.

Specific Heat of solids.

Photoreflectance of Semiconductors Tyler A. Niebuhr.

Raman Spectroscopy A) Introduction IR Raman

Wave Behavior Another McGourty-Rideout Production.

Electro-Hydro-Dynamics Enhancement of Multi-phase Heat Transfer

FREQUENCY CHARACTERISTICS: A SOURCE OF INFORMATION IN PHOTOACOUSTICS Mirosław Maliński Department of Electronics and Computer Studies Technical Univeristy.

Collaboration FST-ULCO 1. Context and objective of the work  Water level : ECEF Localization of the water surface in order to get a referenced water.

Scattering property of rough surface of silicon solar cells Bai Lu a, b, *,Wu Zhensen a, Tang Shuangqing a and Pan Yongqiang b a School of Science, Xidian.

Sub-THz Component of Large Solar Flares Emily Ulanski December 9, 2008 Plasma Physics and Magnetohydrodynamics.

ITER reflectometry diagnostics operation limitations caused by strong back and small angle scattering E.Gusakov 1, S. Heuraux 2, A. Popov 1 1 Ioffe Institute,

Photo Acoustic Effect And its usage for spectroscopy.

Rinat Ofer Supervisor: Amit Keren. Outline Motivation. Magnetic resonance for spin 3/2 nuclei. The YBCO compound. Three experimental methods and their.

ISDRS 2003 Xiaohu Zhang, N.Goldsman, J.B.Bernstein, J.M.McGarrity and S. Powell Dept. of Electrical and Computer Engineering University of Maryland, College.

Thermo-elastic properties characterization by photothermal microscopy J.Jumel,F.Taillade and F.Lepoutre Eur. Phys. J. AP 23, Journal Club Presentation.

Stefan Hild, Andreas Freise, Simon Chelkowski University of Birmingham Roland Schilling, Jerome Degallaix AEI Hannover Maddalena Mantovani EGO, Cascina.

The educational-oriented pack of computer programs to simulate solar cell behavior Aleksy Patryn 1 Stanisław M. Pietruszko 2  Faculty of Electronics,

1 ST workshop 2005 Numerical modeling and experimental study of ICR heating in the spherical tokamak Globus-M O.N.Shcherbinin, F.V.Chernyshev, V.V.Dyachenko,

Investigation of fluid- fluid phase transition of hydrogen under high pressure and high temperature 2014/11/26 Shimizu laboratory SHO Kawaguchi.

Theory of Intersubband Antipolaritons Mauro F

ENE 311 Lecture 2. Diffusion Process The drift current is the transport of carriers when an electric field is applied. There is another important carrier.

Tzveta Apostolova Institute for Nuclear Research and Nuclear Energy,

Optics of a single Homogeneous and Isotropic Layer

Elektro 041 Analysis of Acoustic Spectra Reflecting Ion Transport Processes in Glassy Electrolytes P. Hockicko a), P. Bury a), S. Jurečka b), M. Jamnický.

Workshop on High-Field THz Science High Power THz Generation and THz Field Enhancement in Nanostructures Fabian Brunner 1, Salvatore Bagiante 2, Florian.

INTRODUCTION Characteristics of Thermal Radiation Thermal Radiation Spectrum Two Points of View Two Distinctive Modes of Radiation Physical Mechanism of.

General Relativity and the Cuprates Gary Horowitz UC Santa Barbara GH, J. Santos, D. Tong, , GH and J. Santos, Gary Horowitz.

Piezoelectric Spectroscopy of the Defects States on the Surfaces of Semiconducting Samples M. Maliński 1, J. Zakrzewski 2, K. Strzałkowski 2, F. Firszt.

Introduction 2. 2.Limitations involved in West and Yennie approach 3. 3.West and Yennie approach and experimental data 4. 4.Approaches based on.

Photoacoustic Spectroscopy of Surface Defects States of Semiconductor Samples 1) M.Maliński, 2) J.Zakrzewski, 2) F.Firszt 1) Department of Electronics.

Supervisor: Dr. Boaz Rafaely Student: Limor Eger Dept. of Electrical and Computer Engineering, Ben-Gurion University Goal Directional analysis of sound.

1 Investigation of Optical Properties n, k … index of refraction and damping  1,  2 … polarization and absorption Problems: The penetration depth of.

APPLICATIONS OF THERMOACOUSTIC TECHNIQUES FOR THERMAL, OPTICAL AND MECHANICAL CHARACTERIZATION OF MATERIALS, STRUCTURES AND DEVICES Mirosław Maliński.

Chemistry 330 Chapter 11 Quantum Mechanics – The Concepts.

Surface and Bulk Fluctuations of the Lennard-Jones Clusrers D. I. Zhukhovitskii.

Application of the inhomogeneous sample model in the piezoelectric spectroscopy of Zn 1-x Be x Te and Cd 1-x Mn x Te mixed crystals. M.Maliński 1) J.Zakrzewski.

The propagation of a microwave in an atmospheric pressure plasma layer: 1 and 2 dimensional numerical solutions Conference on Computation Physics-2006.

1 EFFECTS OF MOLECULAR ORIENTATION AND ANNEALING ON OPTICAL ABSORBTION OF ORIENTED PET POLYMER By Montaser Daraghmeh.

Methods for describing the field of ionospheric waves and spatial signal processing in the diagnosis of inhomogeneous ionosphere Mikhail V. Tinin Irkutsk.

INTRODUCTION Many heat and mass transfer processes in column apparatuses may be described by the convection – diffusion equation with a volume reaction.

Raw datafile Demodulated spectra Averaging into 1 period Energy calibration Part 1: initial data processing Demodulation formula Input: lines to skip /

Longitudinal Motion Characteristics between a Non- Matched Piezoelectric Sensor and Actuator Pair Young-Sup Lee Department of Embedded Systems Engineering,

Coating Program Update Gregory Harry LIGO/MIT on behalf of the Coating Working Group March 22, 2006 LSC Meeting – LHO G R.

Introduction Tight-binding Model Results and Discussions Conclusions

Modeling of the device SEYED AHMAD SHAHAHMADI Principal supervisor: Prof. Dr. Nowshad Amin.

12. Structure Determination: Mass Spectrometry and Infrared Spectroscopy Based on McMurry’s Organic Chemistry, 6 th edition.

1.1 What’s electromagnetic radiation

Pacific Rim Underwater Acoustics Conf. Vancouver, BC, Canada Oct 2007 Naluai – NAVAIR Acoustics Systems Patuxent River, MD Analytic and Experimental.

Thermal Properties of Materials

The identification of the fluctuation effects related to the turbulence and “permanent” layers in the atmosphere of Venus from radio occultation data V.N.Gubenko.

J.Vaitkus et al. PC spectra. CERN RD50 Workshop, Ljubljana, "Analysis of deep level system transformation by photoionization spectroscopy"

1 ASIPP Sawtooth Stabilization by Barely Trapped Energetic Electrons Produced by ECRH Zhou Deng, Wang Shaojie, Zhang Cheng Institute of Plasma Physics,

Stereology approach to snow optics Aleksey V. Malinka Institute of Physics National Academy of Sciences of Belarus.

Date of download: 6/28/2016 Copyright © 2016 SPIE. All rights reserved. Absorptive transillumination imaging of intramyocardial scroll waves: (a) schematic.

Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. Experimental configuration of the PAT setup coregistered with the DOT system. The.

Saturation Roi Levy. Motivation To show the deference between linear and non linear spectroscopy To understand how saturation spectroscopy is been applied.

Fang Liu and Arthur Weglein Houston, Texas May 12th, 2006

Ultra broadband plasmonic absorbers for terahertz waves

SPS1. Obtain, evaluate, and communicate information from the Periodic Table to explain the relative properties of elements based on patterns of atomic.

Really Basic Optics Instrument Sample Sample Prep Instrument Out put

UNIT - 4 HEAT TRANSFER.

Belarus National Academy of Sciences

Measuring Mechanical Properties of Thin Optical Coatings

Anti-Reflective Coatings

CSE 313 Data Communication

Eigenvalues and eigenvectors of the transfer matrix

N.Kukhtarev, T.Kukhtareva, P.Land, J.H. Caulfield, and J.Wang

Phase Equilibria in DOPC/DPPC-d62/Cholesterol Mixtures

Time-distance: methods and results

Presentation transcript:

The Influence of an Inactive Layer on the Photoacoustic Spectra. Mirosław Maliński Faculty of Electronics Technical University of Koszalin Poland

Introduction n There are two main measuring methods of the photoacoustic or photothermal spectra: the microphone and piezoelectric methods. n There are two main models of the physical structure of the sample used in the field of the PHA and PPT spectroscopy: a single layer model & the inactive layer one. n The inactive layer influences strongly the experimental PHA and PPT spectra. n The inactive layer influences the frequency characteristics too. n The interpretation of the spectra depends on the physical model of the sample.

Presentation of the models of samples. A single layer sample ( an ideal case). All thermal and optical parameters are the same in the whole volume of the sample - the sample is homogeneous. A sample with an inactive layer.( a real sample) The uppermost layer of the sample exhibits a lower thermal conductivity and a thermal diffusivity. The thermal reflection coefficient from the layer to the sample R = -1. Optical parameters are the same.

The main features of the microphone and piezoelectric measuring methods n The microphone signal is proportional to the temperature of the surface ( front or rear of the sample. n The piezoelectric signal is proportional to the temperature spatial distribution in the sample. n As a consequence: the inactive layer influences in a different way the amplitude and phase spectra in the microphone and in a piezoelectric measuring methods.

The idea of the inactive layer R=1 R= -1

Theoretical PPT spectra of silicon. (an ideal sample) M.Maliński Phys. Stat. Sol (a), 198 (1), 169,(2003)

The PPT experimental spectra of silicon l=0.07 cm, f= 200 Hz

Experimental PPT spectra of silicon M.Maliński, A.Memon, T.Ikari Archives of Acoustics 28(2),139, (2003)

Experimental PPT spectra of silicon

Explanation

Temperature distributions Low absorption region High Absorption region

PHA phase spectra PHA phase spectra of Zn 1-x-y Mg y Be x Se M.Maliński, L.Bychto, S.Łęgowski, J.Szatkowski, J.Zakrzewski Analytical Science 17,133,(2001)

PHA amplitude spectra PHA amplitude spectra of Zn 1-x-y Mg y Be x Se

Frequency amplitude PPT characteristics. (amazing) Cd 0.49 Mg 0.51 Se d=0.15 cm, alfa=0.04 cm 2 /s, E exc =3.7 eV Theoretical curves for R=1,0,-1. Crosses -experimental results. Theoretical curves: solid R=1, dash R= 0, dots R= -1, d= cm.

Frequency amplitude PPT characteristics. (amazing) CdSe d=0.108 cm, alfa=0.02 cm 2 /s, E exc =3.7 eV Theoretical curves for R=1,0,-1. Crosses -experimental results. Theoretical curves: solid R=1, dash R= 0, dots R= -1, d= cm.

Temperature distribution formula used for the computations derived with the thermal wave interference method. M.Maliński Archives of Acoustics 27(3), 217,(2002).

CONCLUSIONS The inactive layer strongly changes the piezoelectric and photoacoustic spectra and frequency characteristics. In the case of the piezoelectric spectra it influences mainly the amplitude spectra in the high absorption region. In the case of the photoacoustic spectra it influences mainly the phase spectra in the low absorption region. The formulae for the PHA and PPT signals describing the influence of an inactive layer are presented and discussed. The full analytical model is under construction now.