Optical limiting has been investigated for higher fullerenes and compared with C60. The transmission through an aperture placed after solutions of C76 C78 and C84 in tetrahydronaphthalene was measured using Q-switched laser pulses with a wavelength of 532nm and a pulse width of 8ns FWHM. Unlike C60 the transmission for these higher fullerene solutions decreased linearly with increasing optical pulse energy. We attribute the linearized optical limiting response to self-defocusing of the optical beam and the absence of excited-state absorption. The ground state absorption spectra for the higher fullerenes suggest their use for optical limiting in the near infrared and the C84-tetrahydronaphthalene solution was found to be an optical limiter at 1.064μm.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)