In Situ Monitoring of Anodic Oxide Growth on SI (001) by Interface Second-Harmonic Generation

1997 ◽  
Vol 502 ◽  
Author(s):  
S. Janz ◽  
J. A. Bardwell
Keyword(s):  
Space Charge ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Anodic Oxide ◽  
In Situ Monitoring ◽  
Flat Band ◽  
Oxide Growth ◽  
Flat Band Potential ◽  
Oxide Interface

ABSTRACTOptical second-harmonic (SH) generation is used to monitor the anodic growth of oxide on a (001) Si surface. The measured SH intensity is dominated by the nonlinear optical response of the space charge region in the Si just below the Si/oxide interface. The interface SH technique can detect the onset of H desorption, identify the flat band potential, and probe the evolution of space charge within the growing oxide layer.

In-situ evaluation of the anodic oxide growth on Hg1−xCdxTe (MCT) using ellipsometry and second harmonic generation

2000 ◽  
Vol 29 (6) ◽  
pp. 648-653 ◽  
Author(s):  
A. W. Wark ◽  
L. E. A. Berlouis ◽  
F. K. Cruickshank ◽  
D. Pugh ◽  
P. F. Brevet
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Anodic Oxide ◽  
Oxide Growth

scholarly journals In situ second-harmonic generation mediated photodynamic therapy by micelles co-encapsulating coordination nanoparticle and photosensitizer

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 52125-52132 ◽  
Author(s):  
Xuyang Zhou ◽  
Yang Chen ◽  
Jian Su ◽  
Xiaohe Tian ◽  
Yonghuang Luo ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Property A

NIR-PDT strategy was introduced by employing a nonlinear optical conveyor bearing strong second-harmonic generation (SHG) property. A biocompatible micellic system co-delivered the conveyor and photosensitizer for in situ NIR-PDT.

Analysis of nonlinear optical phenomena: perspective of in-situ monitoring method of the semiconductor-film crystal-structure

1990 ◽  
Author(s):  
Valery V. Balaniuk ◽  
Victor F. Krasnov ◽  
Nikolai A. Kul'chitzkii ◽  
Semion L. Musher ◽  
Vasily I. Proc' ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Nonlinear Optical ◽  
In Situ Monitoring ◽  
Semiconductor Film ◽  
Monitoring Method ◽  
Optical Phenomena ◽  
Nonlinear Optical Phenomena

In Situ Measurement of the Second Harmonic Signal of Adsorbing Nonlinear Optical Ionically Self-Assembled Monolayers.

2001 ◽  
Vol 707 ◽  
Author(s):  
C. Brands ◽  
P.J. Neyman ◽  
M.T. Guzy ◽  
S. Shah ◽  
K.E Van Cott ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Second Harmonic ◽  
Salt Water ◽  
Harmonic Signal ◽  
Deionized Water ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Second Harmonic Signal

ABSTRACTIonically self-assembled monolayers (ISAMs) have recently been shown to spontaneously exhibit a polar ordering that gives rise to substantial second order nonlinear optical response. The deposition of ISAMs has been studied in situ via second harmonic generation. This is a particularly sensitive probe of the growth of nanometer-thick films since the centrosymmetry of the immersion solutions, the substrate, and the container yields no SHG contribution from these bulk components. Upon immersion in the NLO-active polyelectrolyte solution, the SHG rises sharply over the first minute. When a film is immersed into salt water, the SHG decreases significantly only to be restored when the salt solution is replaced with deionized water.

In Situ Second Harmonic Generation Measurements of the Growth of Nonlinear Optical Ionically Self-Assembled Monolayers

2000 ◽  
Vol 660 ◽  
Author(s):  
C. Brands ◽  
P.J. Neyman ◽  
M.T. Guzy ◽  
S. Shah ◽  
K.E. Van Cott ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Self Assembled Monolayers ◽  
Optical Polymer ◽  
Wide Range ◽  
Assembled Monolayers ◽  
Self Assembled

ABSTRACTIonically self-assembled monolayers (ISAMs) have recently been shown to spontaneously exhibit a polar ordering that gives rise to a substantial second order nonlinear optical (NLO) response. Here, the deposition of ISAMs has been studied in situ via second harmonic generation (SHG). We show that the adsorption and ordering of a noncentrosymmetric nonlinear optical polymer is constant over a wide range of concentrations. Upon immersion in the NLO-active polyelectrolyte solution, the SHG rises sharply over the first minute. Immersion in the NLO-inactive partner polyelectrolyte leads to a reduction in the SHG signal. Furthermore, when the film is removed from the NLO-active solution and allowed to dry, the SHG increases rapidly as the water evaporates. These studies provide greater understanding of the processes by which noncentrosymmetric order is formed in ISAM films and allows design of improved self- assembled nonlinear optical materials.

Nonlinear Optical Study of Si Epitaxy

1986 ◽  
Vol 75 ◽  
Author(s):  
T. F. Heinz ◽  
M. M. T. Loy ◽  
S. S. Iyer
Keyword(s):  
Nonlinear Optical ◽  
Room Temperature ◽  
Second Harmonic ◽  
Optical Technique ◽  
Optical Study ◽  
Harmonic Response ◽  
Reconstructed Surface ◽  
Epitaxial Crystal Growth ◽  
Si Epitaxy

AbstractThe applicability of the nonlinear optical technique of surface second-harmonic generation to in-situ studies of epitaxial and non-epitaxial crystal growth of centrosymmetric materials is demonstrated. In measurements of the deposition of atomic Si on Si(111)-7×7 surfaces, the (anisotropic) second-harmonic response is seen to be sensitive to the ordering of fractional monolayers of adatoms. For deposition on a substrate held at room temperature, the second-harmonic data are consistent with the formation of a disordered adlayer on top of the original reconstructed surface. The results of real-time measurements of the thermal annealing of disordered Si adlayers of monolayer thickness are also presented.

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