Chromophoric self-assembled NLO multilayer materials: real time observation of monolayer growth and microstructural evolution by in situ second harmonic generation techniques

1993 ◽  
Vol 97 (27) ◽  
pp. 6958-6960 ◽  
Author(s):  
Shlomo Yitzchaik ◽  
Stephen B. Roscoe ◽  
Ashok K. Kakkar ◽  
David S. Allan ◽  
Tobin J. Marks ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Real Time ◽  
Harmonic Generation ◽  
Microstructural Evolution ◽  
Second Harmonic ◽  
Monolayer Growth ◽  
Time Observation ◽  
Real Time Observation ◽  
Multilayer Materials

Optical Second Harmonic Generation as a Tool for In Situ, Real-Time Monitor of Thin Film Epitaxial Growth

2014 ◽  
Vol 605 ◽  
pp. 223-226
Author(s):  
Andrea Rubano ◽  
Tim Günter ◽  
Martin Lilienblum ◽  
Domenico Paparo ◽  
Lorenzo Marrucci ◽  
...  
Keyword(s):  
Thin Film ◽  
Second Harmonic Generation ◽  
Real Time ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
High Energy ◽  
Direct Access ◽  
Human Machine Interaction ◽  
Optical Second Harmonic Generation

Oxide-based hetero-structures are promising candidates for building the next generation of functional devices. In order to achieve this goal, it is required to have solid and reliable sensors for monitoring the growth of thin films with single-atomic-layer sensitivity. So far, the most popular in-situ diagnostic tool is Reflection High Energy Electron Diffraction, which provides information on the structural properties of the growing films, and not a direct access to the desired interfacial physical properties of interest. Furthermore, it needs a strong human-machine interaction, preventing its use into industrial mass production. Standard optics applied on buried interfaces suffers the disadvantage to have a probing depth which is orders of magnitude larger than the interface layer. Here we propose to overcome this problem by resorting to optical Second Harmonic Generation and we present some example to show the potential of this technique as a real-time monitor system for thin-film crystal growth.

Photopolymerization Dynamics Studies of Acrolein on Al, Ni, and Au Substrates Using Surface Second Harmonic Generation

1995 ◽  
Vol 385 ◽  
Author(s):  
Fang Chen ◽  
Suchitra Subrahmanyan ◽  
Hilary S. Lackritz
Keyword(s):  
Vapor Pressure ◽  
Second Harmonic Generation ◽  
Real Time ◽  
Gas Phase ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Dark Reaction ◽  
Pressure Decay ◽  
Rate Of Polymerization

ABSTRACTThe dynamics of the gas phase photopolymerization of acrolein on aluminum (Al), nickel (Ni), and gold (Au) substrates were studied in-situ and in real time using surface second harmonic generation (SSHG) and monitoring vapor pressure decay. The Al and Ni substrates had a significant effect on the apparent rate of polymerization. A dark reaction after irradiation occurred in the absence of metal (Al or Ni) substrates, but no dark reaction was observed when the metal substrates were present. The significant differences in the metal/monomer interactions during photopolymerization are indicated by SEMs of the polyacrolein, as well as evidence from FTIR-ATR spectra. The SSHG intensities from the Au, Al, and polyacrolein surfaces were obtained.

scholarly journals An in situ study of reconstructed gold electrode surfaces by second harmonic generation

1989 ◽  
Vol 163 (2-3) ◽  
pp. 123-128 ◽  
Author(s):  
A. Friedrich ◽  
B. Pettinger ◽  
D.M. Kolb ◽  
G. Lüpke ◽  
R. Steinhoff ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Gold Electrode ◽  
Second Harmonic ◽  
Electrode Surfaces ◽  
In Situ Study

scholarly journals Strong second harmonic generation in SiC, ZnO, GaN two-dimensional hexagonal crystals from first-principles many-body calculations

2015 ◽  
Vol 17 (14) ◽  
pp. 9533-9540 ◽  
Author(s):  
C. Attaccalite ◽  
A. Nguer ◽  
E. Cannuccia ◽  
M. Grüning
Keyword(s):  
Second Harmonic Generation ◽  
Real Time ◽  
Harmonic Generation ◽  
First Principles ◽  
Function Theory ◽  
Second Harmonic ◽  
Two Dimensional ◽  
Many Body ◽  
Ti:Sapphire Laser ◽  
Hexagonal Crystals

By using a real-time approach based on Green's function theory we predict a strong second-harmonic generation (SHG) for frequencies at which Ti:sapphire laser operates and for which the materials are transparent.

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