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Investigation of the transient symmetric state in a pi cell
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View: Figures


Image of FIG. 1.
FIG. 1.

Basic device behavior under field application (observed by a photodetector). Initially the device is in the ground splay state. When the field is applied (at around ), a rapid transition into the state takes place. Later this state breaks down into the state(s).

Image of FIG. 2.
FIG. 2.

Burst driving wave form for the device and illuminating LED. Period A represents the operating time (during which the device is switched into the state), period B is the delay time between bursts (allowing relaxation back to the ground splay state), and period C is the illumination time, during which conoscopic images are obtained.

Image of FIG. 3.
FIG. 3.

Director configurations of (a) splay, (b) , and (c) states determined by using a simple finite-difference relaxation routine to minimize the bulk energy.

Image of FIG. 4.
FIG. 4.

Measured conoscopic images of the device: (a) and (b) in splay state, (c) and (d) in state, and (e) and (f) in state. Simulated results: (g) and (h) in splay state, (i) and (j) in state, and (k) and (l) in state. The cases of (a), (c), (e), (g), (i), and (k) are illuminated/modeled with a blue LED, while the cases of (b), (d), (f), (h), (j), and (l) are illuminated/modeled with a red LED. (Each set of data has been normalized to optimize the image and exploit the image’s full dynamic range.)


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Investigation of the transient symmetric H state in a pi cell