Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/4203
Title: | Optical nonlinearity and power limiting in organic molecules and nanocomposites |
Authors: | Philip, Reji Thomas, Jayan |
Keywords: | nonlinear optics organic polymer nanocomposite z-scan four-wave mixing optical diode photonics |
Issue Date: | Sep-2011 |
Publisher: | SPIE - The International Society for Optical Engineering |
Citation: | Proceedings of the SPIE Vol. 8113, p81130J-1 |
Abstract: | Nonlinear optical transmission in materials has several applications including laser mode-locking, pulse shaping, optical bistability, optical switching, and optical power limiting. Organic molecules suitable for functionalization have been extensively investigated for their third order nonlinearities. We have measured the optical nonlinearity of different novel organic and composite systems including nanocomposite polymer films of Au, Ag and Pt, Organic ionic crystals (pyridinium and quinolinium salts), Au-alkanethiol clusters, thiophene based polymers, and Schiff base complexes, using the z-scan and degenerate four wave mixing techniques, employing laser pulses of nanosecond and femtosecond durations respectively. Most of these materials are found to be efficient optical power limiters under our excitation conditions, and their nonlinear extinction coefficients have been calculated. Enhancement in the optical nonlinearity was sometimes obtained even by mixing of two organic media. From degenerate four wave mixing experiments, the third order nonlinear susceptibility χ(3) and figure of merit χ(3)/α values also have been determined for some of these materials. The above experiments conducted in a large number of organic and composite materials unravel the potential of these media for diverse photonic applications. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/4203 |
ISSN: | 1996-756X 0277-786X (Online) |
Alternative Location: | http://adsabs.harvard.edu/abs/2011SPIE.8113E..10P http://dx.doi.org/10.1117/12.897117 |
Copyright: | 2011 SPIE |
Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2011_SPIE_V8113_p81130J-1.pdf Restricted Access | Restricted access | 317.13 kB | Adobe PDF | View/Open Request a copy |
Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.