Effects of substrate micropatterning on nonlinear optical properties of polar self-assembling films
Self-assembling triblock molecules were previously shown to form thin films with polar order. These films are also known to contain polar supramolecular aggregates that are layered in head-to-tail fashion. In this work, glass substrates were prepared using a focused-ion-beam system to generate 1mm{times}1mm areas containing periodic arrays of squares with lateral dimensions of 7 and 17 {mu}m. The squares were defined by 3 {mu}m wide and 10 nm deep troughs created by Ga ion beams. Using second-harmonic-generation measurements, the average molecular tilt angle was found to be smaller in patterned films, suggesting that micropatterning enhances overall polarization in these films. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204575
- Journal Information:
- Applied Physics Letters, Vol. 78, Issue 26; Other Information: DOI: 10.1063/1.1379988; Othernumber: APPLAB000078000026004127000001; 022125APL; PBD: 25 Jun 2001; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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