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Phase-modulation-broadened line shapes from micrometer-size CS2 droplets.

S X Qian1, R K Chang

  • 1Section of Applied Physics and Center for Laser Diagnostics, Yale University, New Haven, Connecticut 06520, USA.

Optics Letters
|September 5, 2009
PubMed
Summary
This summary is machine-generated.

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Asymmetrically broadened spectral lines in carbon disulfide (CS(2)) droplets result from intensity-dependent refractive index effects. Droplet morphology enhances internal fields and wave decay times, acting as an optical cavity.

Area of Science:

  • Nonlinear optics
  • Laser spectroscopy
  • Condensed matter physics

Background:

  • Stimulated Raman scattering and elastic light scattering are sensitive probes of material properties.
  • The interaction of intense laser light with matter can lead to nonlinear optical phenomena.
  • Droplet microcavities can significantly influence light-matter interactions.

Purpose of the Study:

  • To investigate the origin of asymmetrically broadened spectral line shapes in CS(2) droplets.
  • To elucidate the role of droplet morphology in nonlinear optical processes.
  • To understand the influence of the intensity-dependent refractive index on light scattering spectra.

Main Methods:

  • Analysis of spectral line shapes from stimulated Raman and elastic scattering experiments.

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  • Theoretical modeling of light propagation and enhancement within a spherical droplet.
  • Consideration of the intensity-dependent refractive index of carbon disulfide.

    • Main Results:

    • Observed asymmetric broadening of spectral lines is attributed to phase modulation via the intensity-dependent refractive index.
    • Droplet morphology enhances internal optical fields at input and Stokes wavelengths.
    • The droplet acts as an optical cavity, prolonging wave decay times.

    Conclusions:

    • Phase modulation due to the nonlinear refractive index is the primary cause of spectral asymmetry.
    • Droplet morphology plays a crucial role in enhancing nonlinear optical effects.
    • The droplet's optical cavity properties significantly impact light scattering phenomena in CS(2).