Gaussian beam photothermal single particle microscopy.

@article{Selmke2012GaussianBP,
  title={Gaussian beam photothermal single particle microscopy.},
  author={Markus Selmke and Marco Braun and Frank Cichos},
  journal={Journal of the Optical Society of America. A, Optics, image science, and vision},
  year={2012},
  volume={29 10},
  pages={
          2237-41
        }
}
We explore the intuitive lensing picture of laser-heated nanoparticles occurring in single particle photothermal (PT) microscopy. The effective focal length of the thermal lens (TL) is derived from a ray-optics treatment and used to transform the probing focused Gaussian beam with ABCD Gaussian matrix optics. The relative PT signal is obtained from the relative beam-waist change far from the TL. The analytical expression is semiquantitative, capable of describing the entire phenomenology of… 

Figures from this paper

Photothermal Microscopy: Imaging the Optical Absorption of Single Nanoparticles and Single Molecules

TLDR
This review describes the theoretical basis of PT microscopy, the methodological developments that improved its sensitivity toward single-nanoparticle and single-molecule imaging, and a vast number of applications to single- nanoparticle imaging and tracking in material science and in cellular biology.

Photothermal microspectroscopy with Bessel-Gauss beams and reflective objectives.

Here, we investigate scanning photothermal microspectroscopic imaging of metal nanoparticles with reflective objectives. We show that correction-less collection of spectra from single spherical

Photothermal single particle Rutherford scattering microscopy.

TLDR
It is demonstrated that the quantum-mechanical description of Rutherford scattering has a photonic counterpart in a new form of single particle photothermal microscopy and a lateral split feature is found which will allow new correlation-based velocimetry experiments of absorbing particles with ultrahigh sensitivity.

The physics of the photothermal detection of single absorbing nano-objects: A review

The literature on the theory of the photothermal imaging of single nano objects is reviewed. Several models have been devised to describe the signals magnitude, phase and shape in dependence on the

Twin-focus photothermal correlation spectroscopy

We introduce a novel concept for optical correlation spectroscopy of non-fluorescent absorbing nano-particles termed twin-focus photothermal correlation spectroscopy (Twin-PhoCS). This method

Energy-redistribution signatures in transmission microscopy of Rayleigh and Mie particles.

  • M. SelmkeF. Cichos
  • Physics
    Journal of the Optical Society of America. A, Optics, image science, and vision
  • 2014
TLDR
Within the generalized Lorenz-Mie theory, expressions that generalize the total cross sections to their fractional counterparts are presented, which allow for an analytic quantification of transmission signals, both on-axis and off-axis.

Detection of single gold nanoparticles using spatial modulation spectroscopy implemented with a galvo-scanning mirror system.

TLDR
This work shows that high sensitivity can be obtained by modulating the beam with a galvo-mirror system, rather than by moving the sample, and demonstrates an inexpensive method for making a SMS microscope.

Imaging nano-objects by linear and nonlinear optical absorption microscopies

TLDR
This review discusses the three most common techniques for performing transient absorption microscopy, photothermal heterodyne imaging, and spatial modulation spectroscopy, with an emphasis on the unique information that can be obtained, in comparison to conventional emission or scattering based microscopy experiments.

Optimal detection angle in sub-diffraction resolution photothermal microscopy: application for high sensitivity imaging of biological tissues.

TLDR
The theoretical findings were verified by imaging gold nanoparticles using laser diode based photothermal microscopy with balanced detection scheme and high-sensitivity (SNR ~40) photothermal biological imaging of a mouse brain was also demonstrated.

Microscopyc description of the Photothermal increase of temperature for metallic nanoparticles excited with short-laser pulses

The pulsed photothermal phenomenon due to optically absorbed energy, result from non-radiative decay mechanisms, which in nature, these imply the temporal change in the local free energy and thus a

References

SHOWING 1-10 OF 28 REFERENCES

Photothermal single-particle microscopy: detection of a nanolens.

Combining quantitative photothermal microscopy and light scattering microscopy as well as accurate MIE scattering calculations on single gold nanoparticles, we reveal that the mechanism of

Nano-lens diffraction around a single heated nano particle.

TLDR
The diffraction model proposed here yields succinct analytical expressions for the axial photothermal signal shape and magnitude and its angular distribution, all showing the clear lens-signature, a fact which is not easily evident from the more rigorous EM treatment.

Photothermal Correlation Spectroscopy of Gold Nanoparticles in Solution

We demonstrate correlation analysis of the photothermal signal from gold nanoparticles diffusing in solution. Our experimental setup is primarily optimized for large detection volumes and therefore

Confocal Dual-Beam Thermal-Lens Microscope: Model and Experimental Results

The use of a confocal detection scheme in a dual-beam thermal-lens microscope is presented. It allows the measurement of absorption factors smaller than 10-6 using a heating laser power of 100 mW

Optical response of a single spherical particle in a tightly focused light beam: application to the spatial modulation spectroscopy technique.

We develop a new and numerically efficient formalism to describe the general problem of the scattering and absorption of light by a spherical metal or dielectric particle illuminated by a tightly

Twin-focus photothermal correlation spectroscopy

We introduce a novel concept for optical correlation spectroscopy of non-fluorescent absorbing nano-particles termed twin-focus photothermal correlation spectroscopy (Twin-PhoCS). This method

Realistic modeling of the illumination point spread function in confocal scanning optical microscopy.

  • M. NasseJ. .. Woehl
  • Physics
    Journal of the Optical Society of America. A, Optics, image science, and vision
  • 2010
TLDR
This paper presents a rigorous and general theoretical model for the illumination point spread function of a confocal microscope that correctly reproduces the optical setup and leads to a set of analytical equations that are readily evaluated.

Hot brownian particles and photothermal correlation spectroscopy.

TLDR
A new technique to measure tracer dynamics, which is sensitive to single metal nanoparticles down to a radius of 2.5 nm with a time resolution of a few microseconds, is introduced and a generalized Stokes-Einstein relation for "hot brownian motion" is developed.

Photothermal heterodyne imaging of individual metallic nanoparticles: Theory versus experiment

We present the theoretical and detailed experimental characterizations of photothermal heterodyne imaging. An analytical expression of the photothermal heterodyne signal is derived using the theory

Room-Temperature Detection of a Single Molecule’s Absorption by Photothermal Contrast

TLDR
It is shown that a photothermal detection scheme can resolve absorption events by individual molecular dyes that exhibit poor fluorescence efficiency, and provides contrast for the absorbing objects only, irrespective of scattering by defects or roughness.