Abstract
A method is presented which yields two-photon cross-section values $\ensuremath{\delta}$ which are independent of the statistical properties of the light beam. A two-cell arrangement is used in which the fluorescence intensity produced by two-photon absorption of a laser beam is compared to that due to one-photon absorption of the harmonic light generated by the same beam in a quartz slab at the top of a Maker fringe. The measurement does not require a calibration of the detecting channels but relies on the knowledge of the one-photon cross section at the harmonic frequency and of the appropriate component of the nonlinear susceptibility tensor ${\ensuremath{\chi}}^{(2)}$. Values of $\ensuremath{\delta}$ ($\ensuremath{\lambda}=6943$ \AA{}) are presented for several organic molecules and compared to those obtained by other methods.
Keywords
PhysicsPhotonAbsorption (acoustics)Two-photon absorptionOpticsAbsorption cross sectionAtomic physicsHarmonicBeam (structure)Cross section (physics)Intensity (physics)Tensor (intrinsic definition)LaserQuantum mechanics
Affiliated Institutions
Related Publications
Beam propagation and optical power limiting with nonlinear media
A simple model for absorption and refraction of a laser beam by a bounded nonlinear medium and for diffraction during the beam's subsequent free-space propagation is used to cal...
Two-Photon Laser Scanning Fluorescence Microscopy
Molecular excitation by the simultaneous absorption of two photons provides intrinsic three-dimensional resolution in laser scanning fluorescence microscopy. The excitation of f...
Production and characterization of supersonic carbon cluster beams
Laser vaporization of a substrate within the throat of a pulsed nozzle is used to generate a supersonic beam of carbon clusters. The neutral cluster beam is probed downstream by...
Dielectric-breakdown threshold and nonlinear-refractive-index measurements with picosecond laser pulses
Single pulses from a well-calibrated mode-locked YAG:Nd laser have been used to study the dielectric-breakdown properties of 14 transparent solids. Results are presented for the...
Sensitive measurement of optical nonlinearities using a single beam
A sensitive single-beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for a wide variety of materials is reported. The authors...
Publication Info
- Year
- 1972
- Type
- article
- Volume
- 5
- Issue
- 6
- Pages
- 2557-2568
- Citations
- 100
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
100
OpenAlex
Cite This
J.P. Hermann,
J. Ducuing
(1972).
Absolute Measurement of Two-Photon Cross Sections.
Physical review. A, General physics
, 5
(6)
, 2557-2568.
https://doi.org/10.1103/physreva.5.2557
Identifiers
- DOI
- 10.1103/physreva.5.2557