Negative Third Order Optical Susceptibilities of Squaraines

1993 ◽  
Vol 328 ◽  
Author(s):  
R. F. Shi ◽  
Q. L. Zhou ◽  
A. F. Garito
Keyword(s):  
Configuration Interaction ◽  
Experimental Results ◽  
Excited Configuration ◽  
Third Order ◽  
Frequency Limit ◽  
Two Photon ◽  
Photon States ◽  
Zero Frequency

ABSTRACTQuantum Many-electron calculations based on Multiple-excited configuration interaction have been implemented on squaraine Molecules. It is found that certain squaraines possess negative third order optical susceptibilities (γ) even in the zero frequency limit. Our calculations agree well with the experimental results obtained by Dirk and co-workers[1] for anilinium squarylium (BSQ) in terms of the sign and Magnitude. High-lying two-photon states in squaraines are found to be always critically important. The sign of γ is found to depend on the electron donating ability of the two side groups in squaraines.

Contribution of two-photon states to the third-order optical nonlinearity in squaraine compounds

1998 ◽  
Author(s):  
James H. Andrews ◽  
Kenneth D. Singer ◽  
Carl W. Dirk ◽  
Diana L. Hull ◽  
Kathy C. Chuang
Keyword(s):  
Optical Nonlinearity ◽  
Third Order ◽  
Two Photon ◽  
The Third ◽  
Photon States

Teleportation of Quantum Entangled Two-Photon States in the Presence of Noise

2013 ◽  
Vol 58 (3) ◽  
pp. 268-277
Author(s):  
I.S. Dotsenko ◽  
◽  
R.S. Korobka ◽  
Keyword(s):  
Two Photon ◽  
Photon States

scholarly journals Analyzing free variation with harmony – A case study of verb-cluster serialization

2020 ◽  
Vol 39 (3) ◽  
pp. 407-437
Author(s):  
Markus Bader
Keyword(s):  
Native Speakers ◽  
Initial Position ◽  
Experimental Results ◽  
Modal Verbs ◽  
Weighted Constraints ◽  
Corpus Data ◽  
Frequency Relationship ◽  
Zero Frequency ◽  
Free Variation

Abstract In German, a verb selected by another verb normally precedes the selecting verb. Modal verbs in the perfect tense provide an exception to this generalization because they require the perfective auxiliary to occur in cluster-initial position according to prescriptive grammars. Bader and Schmid (2009b) have shown, however, that native speakers accept the auxiliary in all positions except the cluster-final one. Experimental results as well as corpus data indicate that verb cluster serialization is a case of free variation. I discuss how this variation can be accounted for, focusing on two mismatches between acceptability and frequency: First, slight acceptability advantages can turn into strong frequency advantages. Second, syntactic variants with basically zero frequency can still vary substantially in acceptability. These mismatches remain unaccounted for if acceptability is related to frequency on the level of whole sentence structures, as in Stochastic OT (Boersma and Hayes2001). However, when the acceptability-frequency relationship is modeled on the level of individual weighted constraints, using harmony as link (see Pater2009, for different harmony based frameworks), the two mismatches follow given appropriate linking assumptions.

scholarly journals High-resolution spectral characterization of two photon states via classical measurements

2014 ◽  
Vol 8 (5) ◽  
pp. L76-L80 ◽  
Author(s):  
Andreas Eckstein ◽  
Guillaume Boucher ◽  
Aristide Lemaître ◽  
Pascal Filloux ◽  
Ivan Favero ◽  
...  
Keyword(s):  
High Resolution ◽  
Spectral Characterization ◽  
Two Photon ◽  
Photon States

A series of terpyridine-based zinc(ii) complexes assembled for third-order nonlinear optical responses in the near-infrared region and recognizing lipid membranes

2017 ◽  
Vol 5 (31) ◽  
pp. 6348-6355 ◽  
Author(s):  
Yiwen Tang ◽  
Ming Kong ◽  
Xiaohe Tian ◽  
Jinghang Wang ◽  
Qingyuan Xie ◽  
...  
Keyword(s):  
Lipid Membranes ◽  
Nonlinear Optical ◽  
Near Infrared ◽  
Infrared Region ◽  
Biological Imaging ◽  
Tissue Penetration ◽  
Third Order ◽  
Two Photon ◽  
Optical Responses ◽  
Near Infrared Region

Two-photon (TP) microscopy has advantages for biological imaging in that it allows deeper tissue-penetration and excellent resolution compared with one-photon (OP) microscopy.

One- and two-photon induced molecular conformation change and reorientation and related third-order nonlinearities in phenylamine azo-dye polymer thin films

2002 ◽  
Vol 209 (4-6) ◽  
pp. 451-460 ◽  
Author(s):  
Victor M. Churikov ◽  
Jiann T'suen Lin ◽  
Hui Hsien Wu ◽  
Jian Hung Lin ◽  
Tzer-Hsing Huang ◽  
...  
Keyword(s):  
Thin Films ◽  
Azo Dye ◽  
Molecular Conformation ◽  
Polymer Thin Films ◽  
Conformation Change ◽  
Third Order ◽  
Two Photon

A multitechnique investigation of the second order NLO response of a 10,20-diphenylporphyrinato nickel(II) complex carrying a phenylethynyl based push-pull system in the 5- and 15-positions

2004 ◽  
Vol 08 (11) ◽  
pp. 1311-1324 ◽  
Author(s):  
Maddalena Pizzotti ◽  
Elisabetta Annoni ◽  
Renato Ugo ◽  
Silvia Bruni ◽  
Silvio Quici ◽  
...  
Keyword(s):  
Ab Initio ◽  
Planar Structure ◽  
Third Order ◽  
Incident Wavelength ◽  
Pull System ◽  
Nlo Response ◽  
Self Consistent ◽  
Order Of Magnitude ◽  
Zero Frequency

A multitechnique investigation of the determination of the order of magnitude of the second and third order NLO response of [5-[(4-dimethylaminophenyl)ethynyl]-15-[(4-nitrophenyl)ethynyl]-10,20-diphenylporphyrinato]nickel(II) (1) is reported with the aim to produce self consistent evidence for a significant NLO response of this kind of push-pull porphyrin chromophore. The experimental multitechnique approach is based on the EFISH technique, working with a non-resonant incident wavelength of 1.907 μm, on the solvatochromic method and finally on a vibrational method, avoiding any fluorescence or resonance interference. A theoretical MNDO-TDHF evaluation of the zero-frequency quadratic and cubic hyperpolarizabilities of an ab initio optimized planar structure is also reported. The order of magnitude of the quadratic hyperpolarizability of (1) at zero frequency (β0), was found to be significantly lower than that reported for the corresponding Cu (II) or Zn (II) complexes with the same push-pull porphyrin chromophore.

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