Title :
Nanosecond nonlinear absorption and refraction in C60/toluene solution
Author :
Chen, Chen-Wei ; Wan, Chh-Chien ; Liu, Damien ; Hu, Jung-Kuang ; Tzer-Hsiang Huang ; Wei, Tai-Huei
Author_Institution :
Dept. of Phys., Nat. Chung Cheng Univ., Ming-Hsiung, Taiwan
Abstract :
Nonlinear absorption and refraction in C60/toluene are investigated using the Z-scan technique with trains of picosecond laser pulses extending over ∼70 nanoseconds. Analysis of the experimental results, with a five-energy-band model, assures the contributions of the triplet-triplet excitation and the thermal effect induced by nonradiative relaxation, in addition to the singlet-singlet excitation that was verified in our previous picosecond study.
Keywords :
band structure; fullerenes; high-speed optical techniques; laser beams; light absorption; light refraction; nonlinear optics; optical scanners; organic compounds; thermal lensing; triplet state; 70 ns; Z-scan technique; energy-band model; in C60-toluene solution; nanosecond nonlinear absorption; nanosecond nonlinear refraction; nonradiative relaxation; picosecond laser pulses trains; singlet-singlet excitation; thermal effect; triplet-triplet excitation; Absorption; Laser theory; Optical refraction; Physics; Position measurement; Power engineering and energy; Pulse measurements; Thermal lensing;
Conference_Titel :
Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on
Print_ISBN :
0-7803-7766-4
DOI :
10.1109/CLEOPR.2003.1274712
