Laser Lab B

Laser Lab B
Instruments : Ar laser Copper vaper laser , cryogenic System , Digital Osiloscop , optical elements , Detectors , Co2 laser
Personal : S. Ahmadi,
Project Title : Self-organized SRG formation on azo-polymer thin films

Abstract :
Results : The linear dependence of (T - T*)-1 on the Kerr constant is found to be in good agreement with the predications of the Landau-De Gennes model. The first order phase transition temperatures and susceptibility values were determined for these.

Publications:

1 Multistate polarization addressing usinga single beam in an azo polymer film
S. Ahmadi, R. Barille, S.
Dabos-Seignon, J. –M.Nunzi, E. Ortyl,
S. Kucharski Optics Letters 30(15),1986-1988 2005

2 Self-organization under incoherent light in an azo polymer film S. Ahmadi, R. Barille, S.
Dabos-Seignon, J. –M.
Nunzi, E. Ortyl,
S. Kucharski Optics Letters 30(23),3177-3179 2005


3 Nonlocal communication with Photo-induced structures at the surface of a polymer film
R. Barille, S. Dabos-
Seignon, J. –M. Nunzi, S.
Ahmadi, E. Ortyl,
S. Kucharski Optics express 13(26),10697-10702 2005


4 Dynamical behavior of photo-inducedbirefringence in DSR1-PMMA by using pulsed laser
H. Tajalli, H. Ehsani, S.
Ahmadi Ind. J. Phys. 79(10),1207-1209 2005


5 Experimental Study of Liquid-CrystalAlignment on a Surface Relief Grating A. Madani, H.Khoshsima,
H. Tajalli, S. Ahmadi Laser Physics 16(8),1197-1201 2006


6 Self-organization of materials with walking and talking molecules J. –M. Nunzi, R. Barille,
S. Ahmadi, S. Kucharski Nonlin. Opt., Quant. Opt. 35(1-3),209-215 2006


7 Self-Induced Diffraction Grating Storage in Polymer Films S. Ahmadi, R. Barille, S. Dabos-Seignon, J. –M.
Nunzi, E. Ortyl,
S. Kucharski Mol. Cryst. Liq.
Cryst. 446,99-109 2006


8 Cognitive Ability Experiment withPhotosensitive Organic Molecular Thin
Films R. Barille, S. Ahmadi, E.
Ortyl, S. Kucharski, J. –
M. Nunzi,
Phys. Rev. Lett. 97, 048701
2006


9 Photoinduced surface relief multigratingon thin azopolymer films R. Barille, S. Ahmadi, S.
Dabos-Seignon, J. –M.
Nunzi, E. Ortyl,
S. Kucharski Proceedings of SPIE
(The International
Society for Optical
Engineering) 6195,
(Nanophotonics),
61951N/1-1951N/7 2006

10 Shedding incoherent light on walkingand talking molecules S. Ahmadi, R. Barille, J. –
M. Nunzi, E. Ortyl, S.
Dabos-Seignon, S.
Kucharski
Proceedings of SPIE
(The International
Society for Optical
Engineering) 6195,
(Nanophotonics),
61951E/1-61951E/5 2006


11 Multistate addressing using one singlebeam polarization in an azobenzene
polymer film S. Ahmadi, R. Barille, E.
Ortyl, S. Dabos-Seignon,
S. Kucharski, J. –M.
Nunzi
Proceedings of SPIE
( The International
Society for Optical
Engineering) 6259, art. no. 62590T 2006

13 Neuron growth engineering on aphotoinduced surface relief grating: A tool for plastic neuroelectronics R. Barille, S. Ahmadi ,
S. Dabos-Seignon,
J.-M. Nunzi, F. Letournel,
E. Ortyl, S. Kucharski
Proceedings of SPIE
(Progress in
Biomedical Optics
and Imaging) 6191,art. no. 61911
Q /1 –61911Q/8 2006

14 Linear and Nonlinear HolographicGratings in Saffron S Ahmadi , S W Chan,
R. Barille, S Dabos-
Seignon, J.-M. Nunzi Nonlin. Opt., Quant.
Opt. 36(3-4),195-205 2007

15 The Light Polarization Control of Self-organized Surface Relief Gratings in an
Azo-polymer S. Ahmadi, R. Barille, S.
Dabos-Seignon,
J. –M. Nunzi, E. Ortyl,
S. Kucharski Nonlin. Opt., Quant.
Opt. 36(3-4),217-227 2007

16 PVA/Acridine Orange Recording Material for Holography
K. Pacheco, S. Ahmadi,
G. Aldea, R. Barille,
J.-M. Nunzi Nonlin. Opt., Quant.
Opt. 36(3-4),243-249 2007

17 One step inscription of surface reliefmicrogratings R. Barille, J.-M. Nunzi,
S. Ahmadi-Kandjani,
E. Ortyl, S. Kucharski Opt. Commun. 280, 217-220 2008

18 Cognitive ability process at the molecularlevel R. Barille, S. Ahmadi-
Kandjani, J.-M. Nunzi,
E. Ortyl, S. Kucharski Int. J. Nanotechnol. (IJNT)
5, 885-895 2008

19 Second harmonic generation andphotochromic grating in polyurethane films containing diazo isoxazolechromophore
K. Maranski, S. Kucharski, E. Ortyl, J. –M. Nunzi, S. Ahmadi-Kandjani, S. Dabos-Seignon, S.-W. Chan and R. Barille
Optical Materials In press 2008