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Twist-gram-boundary structure in the B4 phase of a bent-core molecular system identified by second harmonic generation circular dichroism measurement

Title
Twist-gram-boundary structure in the B4 phase of a bent-core molecular system identified by second harmonic generation circular dichroism measurement
Authors
Araoka F.Ha N.Y.Kinoshita Y.Park B.Wu J.W.Takezoe H.
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
2005
Journal Title
Physical Review Letters
ISSN
0031-9007JCR Link
Citation
Physical Review Letters vol. 94, no. 13
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Second harmonic generation circular dichroism (SHG CD) measurements are performed on the B4 phase of a bent-core molecular system. Numerical analysis of SHG CD incorporating magnetic-dipole as well as electric-dipole interaction shows that the B4 phase is in a twist-grain-boundary structure with the helical axis along the bent direction of the molecules. The result is extremely important in the sense that achiral molecules are spontaneously optically resolved, i.e., deracemization, the chiral domains of which give rise to huge chiral nonlinear optical effect. © 2005 The American Physical Society.
DOI
10.1103/PhysRevLett.94.137801
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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