liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Diffractive optical elements based on liquid crystals
Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
2012 (English)In: 4th Workshop on Liquid Crystals for Photonics, 2012Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Liquid crystal-based planar optical elements destined for control of direction of light propagation are investigated. There are diffractive active lenses, dynamic diffraction gratings, tuneable prisms, etc. Among the attractive features of such optical elements are non-mechanical tunability, low driving voltage, relatively low cost, and small sizes. In fact, they can be much smaller and have less weight that conventional glass and plastic analogues [1-3]. The key role in achieving the needed optical properties plays a liquid crystal due to its unique features - electric and optical anisotropies coupled with high fluidity. A certain distribution of an external electric field or inhomogeneous boundary conditions leads to a spatial distribution of the liquid crystal molecules (director) that, in turn, forms an optically inhomogeneous medium. This medium affects the light propagation in the required way.

In the present work, we study formation of a desired liquid crystal director distribution by the use of inhomogeneous alignment, i.e. non-uniform distributions of anchor energy or the pre-tilt angle. Such an approach enables one to control the optical element by a uniform electric field when only two continues electrodes are needed. This means that there are no constructive regularities, e.g. a periodic arrangement of the electrodes or thickness, which often have undesired impact on diffractive characteristics of the optical elements. Moreover, periodicity and diffraction efficiency of such kind of the optical elements can be higher than the optical elements controlled by an inhomogeneous electric field [1-3].

As examples of practical applications, a reflective lens utilising cholesteric liquid crystal and a projection optical system for hypothetic near eye displays that can be built into a contact lens or glasses will be reported.

References

[1] S. Valyukh, I. Valyukh, V. Chigrinov, H. S. Kwok, and H. Arwin, “Liquid crystal light deflecting devices based on nonuniform anchoring,” Appl. Phys. Lett. 97, 231120 (2010).

[2] S. Valyukh, V. Chigrinov,  “Optimization of Liquid-Crystal Phase Arrays,” SID Symposium Digest 42, pp. 1691-1694 (2011).

[3] S. Valyukh, V. Chigrinov, H. S. Kwok, and H. Arwin, “On liquid crystal diffractive optical elements utilizing inhomogeneous alignment, ” Optics Express, 20, pp. 15209-15221 (2012).

Place, publisher, year, edition, pages
2012.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-87129OAI: oai:DiVA.org:liu-87129DiVA: diva2:585517
Conference
4th Workshop on Liquid Crystals for Photonics 2012, 9-11 December, 2012, Hong Kong
Available from: 2013-01-10 Created: 2013-01-10 Last updated: 2013-01-24

Open Access in DiVA

No full text

Authority records BETA

Valyukh, Sergiy

Search in DiVA

By author/editor
Valyukh, Sergiy
By organisation
Applied Optics The Institute of Technology
Atom and Molecular Physics and Optics

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 108 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf