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New azobenzene LCs have enhanced photosensitivity for visible wavelengths and can be used for optical switching of nanosecond pulses as well as cw laser beams
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Material Name
|
Tc [oC] |
λm [nm] |
a [cm-1] |
t [s] |
Minimum order
[g] |
Price/g |
|
BPND-2(5%)/1205
|
58
|
445 (cis)
|
2100
|
~105
|
2
|
550
|
|
BPND-2(10%)/5CB
|
30.5
|
471
|
5880
|
0.1
|
2
|
550
|
|
CPND-2(7.5%)/1205
|
60
|
442 (cis)
|
2330
|
~105
|
2
|
550
|
|
CPND-5(10%)/5CB
|
38.5
|
471
|
5360
|
~ 1
|
2
|
550
|
|
CPND-7(10%)/5CB
|
39
|
471
|
5650
|
0.9
|
2
|
550
|
|
NT7CBZ(3%)/5CB
|
39
|
574
|
4790
|
0.002
|
2
|
550
|
|
NB7CBZ(5%)/5CB
|
43
|
537
|
6540
|
0.003
|
2
|
550
|
|
CPND-K(5%)/5CB
|
36
|
473
|
3050
|
~ 1
|
2
|
550
|
|
CPND-W(10%)/5CB
|
34.5
|
481
|
6070
|
~ 1
|
2
|
550
|
|
Eut57(15%)/5CB
|
41.5
|
471
|
7370
|
~ 1
|
2
|
550
|
| MXT-S1 |
39.2 |
470 |
8320 |
~ 1 |
2 |
750 |
Tc: clearing temperature; lm: wavelength of maximal absorption; a absorption coefficient at 532 nm wavelength; t : cis-isomer lifetime
References
- U. A. Hrozhyk, S. V. Serak, N. V. Tabiryan, L. Hoke, D. M. Steeves, B. R. Kimball, ”Azobenzene liquid crystalline materials for efficient optical switching with pulsed and/or continuous wave laser beams,” Optics Express, 18,. 8697-8704 (2010).
- U. Hrozhyk, S. V. Serak, N. V. Tabiryan, T. J. White, T. J. Bunning, “Optically switchable, rapidly relaxing cholesteric liquid crystals reflectors”, Optics Express, 18, 9651-9657 (2010).
- L. De Sio, S. Serak, N. Tabiryan, S. Ferjani, A. Veltri, C. Umeton, ”Composite holographic gratings containing light-responsive liquid crystals for visible bichromatic switching,” Adv. Mat., 22, 2316–2319 (2010).
- R. M. Osgood, D. M. Steeves, L. E. Belton, J. R. Welch, R. Nagarajan, Caitlin Quigley, G. F. Walsh, N. V. Tabiryan, S. Serak, B. R. Kimball, “Optical properties of nanoparticle-doped azobenzene liquid crystals”, Mater. Res. Soc. Symp. Proc., 1142, 1142-JJ10-05 – 1142-JJ10-13 (2009).
- U. Hrozhyk, S. Serak, N. Tabiryan, D. Steeves, L. Hoke, B. Kimball, “Azobenzene liquid crystals for fast reversible optical switching and enhanced sensitivity for visible wavelengths”, Liquid Crystals XIII, ed. by I.-C. Khoo, Proc. of SPIE, 7414, 74140L-1-15 (2009).
- U. Hrozhyk, S. Nersisyan, S. Serak, N. Tabiryan, L. Hoke, D. Steeves, B. Kimball, “Optical switching of liquid-crystal polarization gratings with nanosecond pulses”, Opt. Lett. 34, 2554-2556 (2009).
- U. A. Hrozhyk, S. V. Serak, N. V. Tabiryan, L. Hoke, D. M. Steeves, B. Kimball, and G. Kedziora,” Systematic study of absorption spectra of donor–acceptor azobenzene mesogenic structures”, Mol. Cryst. & Liq. Cryst. 489, 257[583]–272[598] (2008).
750
970
680
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32789 , USA 407-629-1282
Tel. 877-803-6579 (toll-free)
Fax 407-629-0460
e-mail: sales@beamco.com
http://www.beamco.com/
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