Next Article in Journal
Microindentation Hardness of Protein Crystals under Controlled Relative Humidity
Previous Article in Journal
A Novel Dual Air-Bearing Fixed-χ Diffractometer for Small-Molecule Single-Crystal X-ray Diffraction on Beamline I19 at Diamond Light Source
Previous Article in Special Issue
Generating, Separating and Polarizing Terahertz Vortex Beams via Liquid Crystals with Gradient-Rotation Directors
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Crystals 2017, 7(11), 338; doi:10.3390/cryst7110338

Ultrafast Photoalignment: Recording a Lens in a Nanosecond

BEAM Engineering for Advanced Measurements Co., 1300 Lee Rd., Orlando, FL 32810, USA
Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45433, USA
Author to whom correspondence should be addressed.
Academic Editor: Vladimir Chigrinov
Received: 9 October 2017 / Revised: 31 October 2017 / Accepted: 31 October 2017 / Published: 3 November 2017
(This article belongs to the Special Issue Micro and Nano Patterned Substrates for Liquid Crystal Alignment)
View Full-Text   |   Download PDF [3470 KB, uploaded 3 November 2017]   |  


Liquid crystals can be photoaligned with a single nanosecond pulse acting on thin photoanisotropic coatings on the cell substrates. This phenomenon was demonstrated for pulses of 532 nm and 355 nm wavelengths (second and the third harmonics of a Nd:YAG laser). Direct printing of liquid crystal cycloidal diffractive waveplates and diffractive waveplate lenses characterized by high spatial frequencies required only a mJ energy. The liquid crystal alignment dynamics reveal a fast component related to photoalignment of molecules within the photoanisotropic layer and a slower component related to alignment of the liquid crystal within the cell. View Full-Text
Keywords: photoalignment; diffractive waveplates; liquid crystals; liquid crystal polymers; flat lenses; diffractive optics; geometrical phase optics photoalignment; diffractive waveplates; liquid crystals; liquid crystal polymers; flat lenses; diffractive optics; geometrical phase optics

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Serak, S.V.; Bunning, T.J.; Tabiryan, N.V. Ultrafast Photoalignment: Recording a Lens in a Nanosecond. Crystals 2017, 7, 338.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top