Journal article
Backflow-assisted time-resolved phase modulation in nematic liquid crystal Pi-Cells
- Abstract:
- By monitoring the time-dependent phase modulation behavior, we demonstrate the benefits of backflow on the phase modulation depth of nematic liquid crystal (LC) pi-cells in comparison to the phase modulation observed for other nematic LC device configurations. Specifically, results are presented for the time-resolved phase modulation of three different nematic LC device configurations under a range of electric field conditions: pi-cell (parallel-rubbed alignment layers), Fréedericksz cell (anti-parallel rubbed alignment layers), and a hybrid aligned nematic (HAN) device. The time-dependent behavior is obtained experimentally with a Michelson interferometer with a piezoelectric scanning mirror in the reference arm, which provides a continuous phase ramp in the reference signal. By recording the interference signal intensity, it is then possible to extract the change in optical phase as a function of time. It is shown that both the pi-cell and Fréedericksz cell exhibit a modulation that is greater than π radians for a double-pass configuration (2π radians for a four-pass configuration), with the lowest voltage amplitude corresponding to π phase modulation being observed for the pi-cell. Through the time-resolved response, it is shown that the presence of backflow hinders the dynamic phase response of the Fréedericksz device but does not negatively impact the behavior of the pi-cell. These results are found to be in good agreement with simulations of the phase modulation for the three nematic devices when backflow is taken into consideration.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Version of record, pdf, 7.1MB, Terms of use)
-
- Publisher copy:
- 10.1016/j.optlastec.2022.108596
Authors
- Publisher:
- Elsevier
- Journal:
- Optics and Laser Technology More from this journal
- Volume:
- 156
- Article number:
- 108596
- Publication date:
- 2022-08-26
- Acceptance date:
- 2022-08-14
- DOI:
- EISSN:
-
1879-2545
- ISSN:
-
0030-3992
- Language:
-
English
- Keywords:
- Pubs id:
-
1276292
- Local pid:
-
pubs:1276292
- Deposit date:
-
2022-08-27
Terms of use
- Copyright holder:
- Jin et al.
- Copyright date:
- 2022
- Rights statement:
- © 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record