Nonlinear optical absorption and reflection of single wall carbon nanotube thin films by Z -scan technique

Daisuke Shimamoto, Takaaki Sakurai, Minoru Itoh, Yoong Ahm Kim, Takuya Hayashi, Morinobu Endo, Mauricio Terrones

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Both the nonlinear optical transmission and reflection characteristics of HiPco-based single wall carbon nanotube (SWNT) thin films are studied by using the Z -scan method with femtosecond laser pulses at a wavelength of 1.46 μm. The nonlinear absorption coefficient and nonlinear refractive index are obtained as (5.4±2.0) × 10-7 cmW and (1.1±0.5) × 10-11 cm2 W, respectively, which are considerably greater than those of other optical materials. This large optical nonlinearity is ascribed to (a) homogeneously deposited thin nanotube film on optically transparent barium fluoride, (b) just-resonant excitation condition, and (c) intrinsic saturable absorption feature of SWNTs.

Original languageEnglish (US)
Article number081902
JournalApplied Physics Letters
Volume92
Issue number8
DOIs
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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