Double walled carbon nanotubes as ultrafast optical switches

被引：20

作者：

Kamaraju, N. ^{[1
,2
]}

Kumar, Sunil ^{[1
,2
]}

Kim, Y. A. ^{[3
]}

Hayashi, T. ^{[3
]}

Muramatsu, H. ^{[4
]}

Endo, M. ^{[3
]}

Sood, A. K. ^{[1
,2
]}

机构：

[1] Indian Inst Sci, CULA, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[3] Shinshu Univ, Fac Engn, Nagano 3808553, Japan

[4] Shinshu Univ, Inst Carbon Sci & Technol, Nagano 3808553, Japan

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 08期

关键词：

absorption coefficients; carbon nanotubes; high-speed optical techniques; molybdenum; optical saturable absorption; optical switches; refractive index; 3RD-ORDER NONLINEARITY; INDEX;

D O I：

10.1063/1.3213396

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Pristine and molybdenum filled double walled carbon nanotubes (DWNTs) suspended in D2O show excellent ultrafast optical switching properties investigated through femtosecond Z-scan and degenerate pump-probe method using 50 fs pulses with central photon energy of 1.57 eV. For pristine-DWNT, the two photon absorption coefficient, beta and nonlinear refraction coefficient, n(2) are 4.9x10(-8) cm/W, and 9.5x10(-11) cm(2)/W, respectively, which yield one photon figure of merit, W=133 and two photon figure of merit, T=0.4. The degenerate pump-probe measurements show strong photoinduced bleaching with biexponential decay with time constants similar to 150 and 600 fs.

引用

页数：3

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