Investigation of optical limiting in C60 solution

Abstract

Results of experimental and theoretical investigation of optical limiting for 30 ns pulses at 527 nm in C60 are presented which suggest that apart from higher excited state absorption, other nonlinear processes may have an important role in the experimentally observed limiting action.

Enhanced nonlinear absorption and optical limiting in semiconducting polymer/methanofullerene charge transfer films

“…[15][16][17][18][19][20][21][22] Comparable optical limiting was reported for thick layers ͑each several millimeters thick͒ of C 60 in polymethyl methacrylate when pumped on resonance at 532 nm. 23 This research was supported by the U. S. Air Force Office of Scientific Research under AFOSR93-1-0191 ͑Dr.…”

Photoacoustic signal saturation and optical limiting in C₇₀-toluene solution

“…16 The discovery of optical limiting in fullerenes evoked considerable attention because of its comparatively lower threshold limiting fluence. 14,18,19 Joshi et al 20 have found that their transmission measurements on C 60 deviates substantially from the kinetic model based on large excited state absorption ͑ESA͒ and they have attributed the discrepancy to the possibility of multiphoton absorption and/or nonlinear scattering along with ESA.…”

Optical properties of fullerenes confined in ordered alumina nanotube arrays

“…Besides, during the last decade, it was observed that fullerenes C 60 and C 70 present extensive delocalization of their three-dimensional π-electron conjugated systems [6][7][8] . For this reason it is expected that both C 60 and C 70 compounds show large third order optical nonlinearities; indeed, nonlinear refraction and absorption of C 60 and C 70 based solutions have been widely studied in recent years due to their potential applications in optical limiting, all optical switching and optical bistability processes [9][10][11][12][13][14][15] .…”