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|Title:||Observation of three-photon absorption and saturation of two-photon absorption in amorphous nanolayered Se/As2S3 thin film structures|
Suchand Sandeep, C.S.
|Publisher:||American Institute of Physics|
|Citation:||Journal of Applied Physics, 2007, Vol. 102, 026102|
|Abstract:||We have studied the nonlinear optical properties of nanolayered Se/As2S3 film with a modulation period of 10 nm and a total thickness of 1.15 µm at two [1064 nm (8 ns) and 800 nm (20 ps)] wavelengths using the standard Z-scan technique. Three-photon absorption was observed at off-resonant excitation and saturation of two-photon absorption at quasiresonant excitation. The observation of the saturation of two-photon absorption is because the pulse duration is shorter than the thermalization time of the photocreated carriers in their bands and three-photon absorption is due to high excitation irradiance.|
P-ISSN(s): 0021-8979; 0148-6349
|Copyright:||2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.|
|Appears in Collections:||Research Papers (LAMP)|
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|2007 Jou. Appl. Phys. V102 p26102.pdf||Open Access||316.54 kB||Adobe PDF||View/Open|
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