INFRARED PHOTOREFRACTIVE COMPOSITES BASED ON POLYIMIDE AND J-AGGREGATES OF CYANINE DYE

2005 ◽  
Vol 14 (03) ◽  
pp. 439-447 ◽  
Author(s):  
A. V. VANNIKOV ◽  
A. D. GRISHINA ◽  
L. YA. PERESHIVKO ◽  
T. V. KRIVENKO ◽  
V. V. SAVELYEV ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
Response Time ◽  
External Electric Field ◽  
Gain Coefficient ◽  
Cyanine Dye ◽  
Third Order ◽  
Aromatic Polyimide ◽  
Photoelectric Sensitivity ◽  
J Aggregates

Photorefractive composites sensitive to 1064 nm on a base of an aromatic polyimide containing J-aggregates of a thiacarbocyanine dye are presented. The molecules of the dye form the nanocrystalline J-aggregates that are responsible for photoelectric sensitivity at 1064 nm and nonlinear third-order optical properties. The net gain coefficient 266 cm-1 and the response time 0.09 s were achieved at an external electric field of about 15 V/μm.

scholarly journals Tunable electronic and optical properties of a BAs/As heterostructure by vertical strain and external electric field

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21824-21831
Author(s):  
X. Q. Deng ◽  
R. Q. Sheng ◽  
Q. Jing
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
External Electric Field ◽  
Photogenerated Electron ◽  
Electron Hole ◽  
Electronic And Optical Properties ◽  
Vertical Strain

The CBM (VBM) of the heterostructure is mainly contributed by the BAs (arsenene), which will favor the separation of photogenerated electron–hole pairs.

Oxygen migration and optical properties of coronene oxides and their persulfurated derivatives: insight into the electric field effect and the oxygen-site dependence

2020 ◽  
Vol 22 (35) ◽  
pp. 20078-20086
Author(s):  
Qing Zhang ◽  
Yuanyuan Li ◽  
Zexing Cao
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
External Electric Field ◽  
Field Effect ◽  
Electric Field Effect ◽  
Oxygen Migration ◽  
Site Dependence ◽  
Oxygen Site ◽  
Insight Into

Oxygen migration on the surface of coronene (C24) epoxides and their persulfurated derivatives (PSCs) can be easily tuned by an external electric field and their low-lying states show a remarkable oxygen-site dependence.

Tunable electronic and optical properties of the WS2/IGZO heterostructure via an external electric field and strain: a theoretical study

2019 ◽  
Vol 21 (27) ◽  
pp. 14713-14721 ◽  
Author(s):  
Hongyu Tang ◽  
Chunjian Tan ◽  
Huiru Yang ◽  
Kai Zheng ◽  
Yutao Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
Visible Light ◽  
External Electric Field ◽  
Theoretical Study ◽  
Uv Light ◽  
Mechanical Strain ◽  
Electronic And Optical Properties

The external mechanical strain can efficiently modulate the photoresponse of the WS2/IGZO heterostructure to the UV light and the visible light.

Effect of Electric Field on Nonlinear Optical Properties of Hydrazone Doped PMMA Films

2012 ◽  
Vol 584 ◽  
pp. 88-91
Author(s):  
N.K. Siji Narendran ◽  
K.R. Reshma ◽  
P. Sudheesh ◽  
K. Chandrasekharan
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Laser Pulses ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
Single Beam ◽  
Solution Casting Method ◽  
Order Susceptibility

We report the effect of electric field on third order nonlinear optical properties of Hydrazone (Hz) doped Polymethyl methacrylate (PMMA) films. The films were prepared by solution casting method. Poling of films was done by corona discharge. Single beam Z-scan technique with 7ns Nd: YAG laser pulses at 532nm were employed for the measurements. Third order susceptibility of films was measured with an emphasis on the applied electric field. We also demonstrated the second harmonic generation in the corona poled films.

scholarly journals Near-Resonant Nonlinear Optical Properties of Pseudoisocyanine J-Aggregates in Langmuir-Blodgett Layers

1997 ◽  
Vol 17 (3) ◽  
pp. 123-137 ◽  
Author(s):  
K.-H. Feller ◽  
R. Gadonas ◽  
A. Pugzlys ◽  
D. Möbius
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
J Aggregates ◽  
Exciton Annihilation ◽  
Dynamical Disorder ◽  
Order Susceptibility

The nonlinear optical properties of pseudoisocyanine J-aggregates in Langmuir-Blodgett films have been investigated by means of degenerate four wave mixing (DFWM) process. The conversion efficiency of the DFWM signal and the estimated third order susceptibility were found to be comparable with those of pseudoisocyanine J-aggregates in solution under comparable resonance conditions. The intensity dependence of the converted (DFWM) signal is interpreted as resulting from different processes including saturation, exciton-exciton annihilation and secondary processes of dynamical disorder.

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