Large pure refractive nonlinearity of nanostructure silica aerogel at near infrared wavelength

J.T. Seo1, Q. Yang1, S. Creekmore1, D. Temple1
1Department of Physics, Hampton University, Hampton, VA

Tóm tắt

The nonlinear refraction coefficient of the third-order susceptibility of silica aerogel was estimated to be /spl sim/-1.5/spl times/10/sup -15/ m/sup 2//W (/spl sim/-3.67/spl times/10/sup -9/ esu) by a signal-beam z-scan technique with /spl sim/1 ps Ti:sapphire lasers. The third-order nonlinear refraction coefficient of nanostructure silica aerogel is almost five orders larger than the nonlinear (/spl chi//sup 3/) refraction of bulk material. The large nonlinear refraction originates mainly from the direct excitation to the surface trapped states, and the one-photon resonance process.

Từ khóa

#Silicon compounds #Optical refraction #Optical sensors #Nonlinear optics #Biomedical optical imaging #Optical variables control #Nanobioscience #Nanomaterials #Optical surface waves #Chemical and biological sensors

Tài liệu tham khảo

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