Sub-millisecond, high stroke phase modulation using polymer network liquid crystals

Love, Gordon D.; Kirby, Andrew K.; Ramsey, Robert A.

doi:10.1364/oe.18.007384

Cited by 29 publications

(13 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, light scattering occurs due to the refractive index mismatch of polymer networks and LC microdomains [1]. The degree of light scattering can be reduced by using much smaller LC microdomains via optimal processing conditions such as monomer concentrations and photopolymerization conditions [9][10][11][12][13]. Several studies have demonstrated scattering-free PNLC phase modulators at near infrared wavelength [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time

Chien

Sheu

2017

Crystals

View full text Add to dashboard Cite

Photocurable monomer-doped liquid crystal (LC) cells were processed via holographic exposure using a low-power He-Ne laser to generate holographic polymer networks. The polymer network LC (PNLC) cells are used to fabricate infrared phase modulators at 1550 nm wavelength possessing favorable electro-optical performance. Compared with our previous work, the percentages of ingredients in the LC mixture filled in PNLC cells underwent a slight change. The 2 wt% concentration of anisotropic monomer RM257 were in place of isotropic monomer N-vinyl-2-pyrrolidinone (NVP). As a result, the fabricated phase modulators also maintained well homogeneous LC alignments and optical-scattering-free characteristics. Furthermore, NVP dopant successfully reduced the operating voltages from 95 V rms to 79 V rms to prevent polymer network deformation when electrically operating with higher voltages. The fabricated infrared phase modulators had a good average response time (i.e., rising time of 0.88 ms and falling time of 0.40 ms).

show abstract

Section: Introductionmentioning

confidence: 99%

Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time

Chien

Sheu

2017

Crystals

View full text Add to dashboard Cite

show abstract

“…[5][6][7][8][9][10][11][12] These light shutters are switchable between their transparent and translucent (or opaque) states by scattering (or absorbing) the incident light. The translucent or opaque state can be used to increase the visibility of a see-through display, whereas the transparent state can be used to view the background together with the displayed images.…”

Section: Introductionmentioning

confidence: 99%

Fast-switching initially-transparent liquid crystal light shutter with crossed patterned electrodes

2015

View full text Add to dashboard Cite

We propose an initially transparent light shutter using polymer-networked liquid crystals with crossed patterned electrodes. The proposed light shutter is switchable between the transparent and opaque states, and it exhibits a fast response time and a low operating voltage. In the transparent state, the light shutter has high transmittance; in the opaque state, it can block the background image and provides black color. We expect that the proposed light shutter can be applied to see-through displays and smart windows.

show abstract

“…Polymer network liquid crystal (PNLC) is an efficient way to get both fast response and large phase modulation depth, but these cells exhibit strong scattering in the visible region [8], [9]. Sheared PNLC (SPNLC) reduces light scattering by employing a mechanical shearing process to obtain uniform alignment of LCs [10]- [12]. But until recently, suppression of scattering in SPNLC devices remains a challenging task for visible region.…”

Section: Introductionmentioning

confidence: 99%

Submillisecond-Response Sheared Polymer Network Liquid Crystals for Display Applications

Sun

Ramsey²,

Chen

et al. 2012

J. Display Technol.

View full text Add to dashboard Cite

A 4 phase modulator with an average gray-to-gray response time of 400 s is demonstrated based on sheared polymer network liquid crystal (SPNLC). This device exhibits a low scattering at 532 nm due to our new material set and shearing technique. We also discuss the application of SPNLCs for 3D display, such as lenticular lens.Index Terms-Fast response, lenticular lens, liquid crystals (LCs), sheared polymer network liquid crystal (SPNLC), 3D display.

show abstract

Sub-millisecond, high stroke phase modulation using polymer network liquid crystals

Abstract: We describe the production of a high speed, and high stroke, phase modulator using a polymer network liquid crystal device. We present data showing fast response times (sub millisecond) in a device which can operate at visible wavelengths with a simple electrical addressing scheme.

Cited by 29 publications

References 18 publications

Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time

Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time

Fast-switching initially-transparent liquid crystal light shutter with crossed patterned electrodes

Submillisecond-Response Sheared Polymer Network Liquid Crystals for Display Applications

Contact Info

Product

Resources

About