Title :
Third-harmonic conical emission in solids using tightly-focused femtosecond infrared pulses
Author :
Homoelle, D. ; Moll ; Gaeta, Alexander L. ; Boyd, Robert W.
Author_Institution :
Sch. of Appl. & Eng. Phys., Cornell Univ., Ithaca, NY, USA
Abstract :
Summary form only given. It is a well-known prediction in nonlinear optics that it is not possible within the perturbative limit to generate the third harmonic for a tightly-focused Gaussian beam in a positively dispersive medium. However, it has been shown in gases that third-harmonic emission can occur as the result of additional nonlinear processes such as the nonlinear refractive index and plasma formation.We report the observation of conical emission of third-harmonic light when femtosecond pulses are tightly focused into a transparent solid. In addition, we observe red-shifted components near the third-harmonic which represent the first observation of three photon hyper-Raman scattering.
Keywords :
high-speed optical techniques; multiphoton spectra; optical dispersion; optical focusing; optical harmonic generation; optical parametric amplifiers; red shift; transparency; Gaussian beam; nonlinear optics; nonlinear refractive index; positively dispersive medium; red-shifted components; third harmonic; third-harmonic conical emission; three photon hyper-Raman scattering; tightly-focused femtosecond infrared pulses; transparent solid; Dispersion; Gases; Nonlinear optics; Optical harmonic generation; Optical pulses; Optical scattering; Plasmas; Refractive index; Solids; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-663-X
DOI :
10.1109/QELS.2001.961812
