Title :
Dynamics of photogenerated solitons in trans-polyacetylene
Author :
Rothberg, L. ; Jedju, T.M. ; Etemad, S. ; Baker, G.L.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
Time-resolved absorption using pole wavelengths of 2.5-5.5 mu m has been used to study photoexcitations in the quasi-one-dimensional semiconductor, trans-polyacetylene. Present apparatus has 0.5-ps resolution, which is sufficient to observe the decay of the photogenerated charged soliton pairs which form after intrachain excitation of electron-hole pairs. The tunability of the apparatus permits the unambiguous identification of solitons and observation of spectral relaxation during their formation.<>
Keywords :
infrared spectra of organic molecules and substances; nonlinear optics; organic semiconductors; polymers; solitons; time resolved spectra; 2.5 to 5.5 micron; decay; electron-hole pairs; intrachain excitation; photoexcitations; photogenerated soliton dynamics; pole wavelengths; quasi-one-dimensional semiconductor; spectral relaxation; time resolved absorption; trans-polyacetylene; tunability; Absorption; Fiber lasers; Glass; Laser mode locking; Optical pulses; Polymers; Pulse amplifiers; Pump lasers; Solitons; Temperature;
Journal_Title :
Quantum Electronics, IEEE Journal of
