Tunable nonlinear absorption of hydrogenated nanocrystalline silicon

Nonlinear absorption (NLA) of hydrogenated nanocrystalline silicon (nc-Si:H) has been investigated through the open aperture Z-scan method for the photon energy of the incident irradiance slightly less than the bandgap of the sample. NLA responses have been observed to be highly sensitive to the wav...

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Bibliographic Details
Published in:Optics letters 2011-09, Vol.36 (17), p.3431-3433
Main Authors: MA, Y. J, OH, J. I, ZHENG, D. Q, SU, W. A, SHEN, W. Z
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optical elements, devices, and systems
Optical materials
Optical susceptibility, hyperpolarizability
Optics
Other nonlinear optical materials
photorefractive and semiconductor materials
Physics
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Summary:Nonlinear absorption (NLA) of hydrogenated nanocrystalline silicon (nc-Si:H) has been investigated through the open aperture Z-scan method for the photon energy of the incident irradiance slightly less than the bandgap of the sample. NLA responses have been observed to be highly sensitive to the wavelength and intensity of the incident irradiance as well as to the bandgap of the sample, indicating greatly tunable NLA of nc-Si:H. The band tail of nc-Si:H appears to play a crucial role in such NLA responses.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.36.003431