Photothermal deflection in multilayer coatings: modeling and experiment.

@article{Gallais2005PhotothermalDI,
  title={Photothermal deflection in multilayer coatings: modeling and experiment.},
  author={Laurent Gallais and Mireille Commandr{\'e}},
  journal={Applied optics},
  year={2005},
  volume={44 25},
  pages={
          5230-8
        }
}
A model of the photothermal deflection signal in multilayer coatings is presented that takes into account optical interference effects and heat flow within the stack. Measurements are then taken of high-reflectivity HfO2/SiO2 ultraviolet mirrors made by plasma ion assisted deposition and compared to calculations. Good agreement is found between the experimental results and the model. Using this model for the calibration and the setup described, one can measure absorption in multilayer coatings… Expand

Figures, Tables, and Topics from this paper

Photothermal detuning: a sensitive technique for absorption measurement of optical thin films
A simple and sensitive photothermal technique-photothermal detuning (PTDT), which is based on the absorption-induced shift of reflectance or transmission spectrum of an optical coating, is developedExpand
Absorption measurements in optical coatings by lock-in thermography.
TLDR
Lock-in thermography is evaluated and applied as a method to quantitatively evaluate absorption losses of optical coatings and the measurement of absorption down to 1 ppm level could be reached. Expand
Photothermal detuning for absorption measurement of optical coatings.
TLDR
The theoretical description of the photothermal detuning signal with a continuous-wave modulated laser beam excitation is presented and good agreement is obtained between the experimental results and the theoretical predictions. Expand
Simultaneous absorption, scattering, and luminescence mappings for the characterization of optical coatings and surfaces.
An experimental setup, based on the laser-induced deflection technique, is developed to measure simultaneously the 244 nm laser absorption, scattering, and luminescence on optical components. TheExpand
A theoretical investigation of the laser damage threshold of metal multi-dielectric mirrors for high power ultrashort applications.
TLDR
An approach for the theoretical evaluation of the damage threshold in optical interference coatings that combine metal and dielectric films is presented and the impact of the metal film and the design on the Laser Induced Damage Threshold in the sub picosecond regime is studied. Expand
Temperature field analysis of optical coatings induced by millisecond and nanosecond lasers
To study the differences between long-pulse and short-pulse laser-induced damage in optical dielectric thin films, temperature distributions in single-layer HfO 2 films, multi-layer HfO 2 /SiO 2Expand
Configuration optimization of photothermal deflection for measurement sensitivity enhancement.
TLDR
It is demonstrated experimentally that the PTD amplitude is inversely proportional to the probe beam wavelength by using three probe lasers with a wavelength of 375 nm, 543 nm, and 632.8 nm, therefore, the measurement sensitivity of PTD technique could be enhanced by using a short-wavelength probe beam. Expand
Temperature field analysis of single-layer TiO2 films.
TLDR
A method is presented to evaluate optical absorption at a random wavelength by calculating temperature distribution in single-layer TiO(2) films and the results agree well with the measured optical absorptions. Expand
Study on the absorption uniformity of optical thin films based on the photothermal detuning technique.
TLDR
The photothermal detuning technique used for absorption uniformity measurement of optical thin films is developed for the first time and the results show that the designed experimental system can be used to analyze the absorption Uniformity of optical coatings. Expand
Calibration optimization of laser-induced deflection signal for measuring absorptance of laser components.
TLDR
Temperature models describing the temperature rise distributions within a test sample excited with flat-top beam irradiation and within a reference sample excitedwith surface resist heating are developed and the LID signals used to determine the absorptance of the surface or coating of a laser component and the corresponding calibration error are analyzed. Expand
...
1
2
3
...

References

SHOWING 1-10 OF 40 REFERENCES
Characterization of optical coatings by photothermal deflection.
TLDR
An overview of photothermal deflection principles and applications is given, and three configurations usually employed are compared and their respective advantages are discussed in relation to their application. Expand
Calculation and measurement of the absorption in multilayer films by means of photoacoustics
Abstract Using the photoacoustic gas cell microphone technique, absorption measurements were carried out in dielectric TiO 2 /SiO 2 multilayer stacks at λ = 515 nm. For an interpretation of theExpand
Photothermal spectroscopy using optical beam probing: Mirage effect
Optical beam deflection near a heated surface was recently introduced as a method of photothermal spectroscopy. Photothermal spectroscopy (PTS) is closely related to photoacoustic spectroscopy (PAS)Expand
Photothermal deflection spectroscopy and detection.
TLDR
The theory for a sensitive spectroscopy based on the photothermal deflection of a laser beam is developed and its implications for imaging and microscopy are given, and the sources of noise are analyzed. Expand
Photothermal characterization of optical thin film coatings
Photothermal techniques are widely used in thin film characterizations and are particularly useful in studying laser-induced damage in optical coatings. The specific applications include measuringExpand
Photothermal displacement spectroscopy: An optical probe for solids and surfaces
We present a sensitive technique for determining the optical and thermal properties of solids, surfaces and thin films. This technique, photothermal displacement Spectroscopy, is based on theExpand
Photothermal measurements on optical thin films.
TLDR
An overview of the application of the photothermal technique for optical as well as thermophysical characterizations of thin films is given, and emphasis is placed on the influence of both residual absorption and randomly distributed inhomogeneities in thin films on their laser-damage resistance. Expand
Photothermal facility for optical characterization of DUV materials
A photothermal facility implemented for optical characterization at 244nm is presented. This apparatus allows simultaneous absorption, partial scattering and fluorescence mappings of substrates andExpand
Measurements of absorption losses in TiO(2) films by a collinear photothermal deflection technique.
TLDR
The principle of photothermal deflection for measuring absorption losses in TiO(2)films is reviewed and a variation in absorption as a function of time on some layers is detected. Expand
Sensitive photothermal deflection technique for measuring absorption in optically thin media.
TLDR
A highly sensitive and simple photothermal scheme for determining optical absorptions in condensed matter samples and a comparison with thermal lens effect is given. Expand
...
1
2
3
4
...