Stimulated Raman scattering from individual water and ethanol droplets at morphology-dependent resonances

✍ Scribed by Snow, Judith B.; Qian, Shi-Xiong; Chang, Richard K.

• Book ID: 115415624
• Publisher: Optical Society of America
• Year: 1985
• Tongue: English
• Weight: 380 KB
• Volume: 10
• Category: Article
• ISSN: 0146-9592
• DOI: 10.1364/OL.10.000037

✦ Synopsis

Stimulated Raman scattering (SRS) from an individual liquid droplet (-30-Am radius) has been observed for H 2 0, D 2 0, and ethanol. The occurrence of a series of spectrally narrow peaks that are regularly spaced in wavelength is consistent with morphology-dependent resonances of the droplet, which acts as an optical resonator. The input intensity required to achieve the SRS threshold for the droplet is considerably less than that for the liquid in an optical cell.The stimulated Raman scattering (SRS) process of any medium is dependent on the spontaneous Raman cross section and linewidth, the path length of the medium, the input intensity, and the optical feedback at the Stokes-shifted frequency (co = -COvib, where CO., wi, and Cnvib are the frequencies of the Stokes radiation, the incident radiation, and the vibrational mode, respectively).' In an extended medium (solid, liquid, or gas), the single-pass SRS threshold is typically reached