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BEAM Co.'s azobenzene liquid crystals are photosensitive materials for photonics,
nonlinear optical applications, optical information recording and processing.
| Item # |
Chemical name |
Nematic range
[oC] |
Minimum order
[ g ] |
Price/g |
Price/g
(>10 g )
|
| Single Component |
| D307 |
4-heptyl
4’-propylazobenzene |
3-34 |
2 |
840 |
672 |
| D308 |
4-octyl
4’-propylazobenzene |
15 – 251) |
2 |
840 |
672 |
| CAB6 |
4-cyano
4’-hexyloxyazobenzene |
99 - 116 |
2 |
384 |
307 |
| CAB7 |
4-cyano
4’-heptyloxyazobenzene |
91 - 110 |
2 |
384 |
307 |
| CAB8 |
4-cyano
4’-octyloxyazobenzene |
102 - 111 |
2 |
384 |
307 |
| Multi Component |
| 1005 |
N/A |
12.5 - 48.5 |
2 |
348 |
278 |
| 1205 |
N/A |
8 – 59 |
2 |
372 |
298 |
| 5721 |
N/A |
8 – 70 |
2 |
408 |
326
|
| 13C5 |
N/A |
29 - 462) |
2 |
414 |
331 |
| 8621 |
N/A |
22 - 722) |
2 |
408 |
326 |
| 8721 |
N/A |
28 – 722) |
2 |
408 |
326 |
| 4915 |
N/A |
-7 - 57 |
2 |
372 |
298 |
| 1)Monotropic smectic A phase below -16ºC. |
| 2)Monotropic smectic A phases below nematic range. |
| LC |
T[oC] |
n2 [cm2/W] (a) |
Einc [J/cm2] (b) |
Eiso [J/cm2] (c) |
Dn (d) |
D [cm2/s] (e) |
e^ |
e|| |
UFr [V] |
| 1005 |
12.5 N 48.5 I |
2.0×10-1 |
0.073 |
0.39 |
0.18 |
5.3×10-6 |
3.0 |
3.4 |
8.2 |
|
1006
|
15 N 53 I
|
2.1×10-1
|
0.074
|
0.39
|
0.18
|
5.2×10-6
|
3.2
|
3.6
|
9.7
|
|
1007
|
17 N 52 I
|
2.4×10-1
|
0.077
|
0.51
|
0.18
|
5×10-6
|
3.2
|
3.7
|
9.9
|
|
1205
|
8 N 59 I
|
2.1×10-1
|
0.13
|
0.73
|
0.21
|
6.3×10-6
|
3.2
|
4.0
|
9.5
|
|
1207
|
16.5 N 63.5 I
|
1.9×10-1
|
0.14
|
0.82
|
0.20
|
6.2×10-6
|
3.2
|
3.9
|
9.8
|
|
5721
|
8 N 70 I
|
1.2×10-1
|
0.19
|
1.35
|
0.23
|
3.6×10-6
|
2.6
|
3.3
|
15
|
|
8621
|
SmA 22 N 72 I
|
1.1×10-1
|
0.16
|
1.64
|
0.20
|
6.1×10-6
|
3.0
|
3.3
|
19.6
|
|
8721
|
SmA 28 N 72I
|
1.1×10-1
|
0.16
|
1.68
|
0.21
|
8.7×10-6
|
3.1
|
3.2
|
22.8
|
|
4911
|
2 N 56 I
|
1.9×10-1
|
0.075
|
0.52
|
0.18
|
4.7×10-6
|
3.3
|
3.9
|
20.5
|
|
4915
|
-7 N 57 I
|
2.1×10-1
|
0.067
|
0.47
|
0.18
|
4.1×10-6
|
3.1
|
3.7
|
17
|
|
4955
|
4 N 63 I
|
2.1×10-1
|
0.13
|
0.93
|
0.20
|
4.4×10-6
|
3.0
|
3.7
|
19.8
|
|
4913
|
3 N 52 I
|
2.0×10-1
|
0.076
|
0.60
|
0.20
|
4.2×10-6
|
3.0
|
3.6
|
18
|
|
4953
|
4 N 57 I
|
2.0×10-1
|
0.10
|
0.79
|
0.21
|
4×10-6
|
3.0
|
3.5
|
16.3
|
|
3178
|
18 N 41.5 I
|
1.8×10-1
|
0.058
|
0.28
|
0.14
|
5.5×10-6
|
2.4
|
3.2
|
8.5
|
|
3155
|
3 N 48 I
|
2.2×10-1
|
0.11
|
0.43
|
0.20
|
5.1×10-6
|
2.6
|
3.3
|
7.5
|
|
D307
|
3 N 34 I
|
3.2 ×10-1
|
0.016
|
0.1
|
0.20
|
|
|
|
|
(a) l = 532 nm, I = 4.4×10-7 W/cm2, E||n (E: light polarization; n: LC orientation), L = 10 mm; (b) l = 409 nm, I = 6.2×10-3 W/cm2, L = 10 mm, E||n (L is the thickness of LC layer); (c) l = 409 nm, I = 6.2×10-3 W/cm2, L = 10 mm, E||n; (d) l = 633 nm, T = 23oC; (e) l = 633 nm, T = 23oC
Constant of nonlinear refraction n2: determines the change in the refractive index n – n0 of the material under the influence of a light beam of power density I according to the formula n – n0 = n2I.
Incubation energy Einc: determines the amount of light energy that the LC has to be exposed to in order to start photoinduced mesophase-isotropic phase transition.
Transition energy Eiso: determines the amount of light energy that LC has to be exposed to in order for the material to be transformed into isotropic phase.
Optical anisotropy Dn: is defined as the difference between the principal values of the refractive indices of LC.
Constant of “orientation diffusion D: allows to evaluate the free relaxation time t of LC director reorientation in cells of thickness L with hard anchoring boundary conditions with the aid of the formula t = L2/D. The constant of “orientation diffusion” D is related with the orientational viscosity g and the elastic constant K1 of the liquid crystal by the expression D = p2K1/g.
Constants of dielectric susceptibility: e^ and e|| are the principal values of the dielectric susceptibility of NLC at 1 kHz.
Freedericks transition threshold UF: the minimum voltage necessary to apply to the NLC cell in order to induce NLC reorientation.
References
- U. Hrozhyk, S. Serak, N. Tabiryan, L. Hoke, D. M. Steeves, G. Kedziora, B. Kimball, “High optical nonlinearity of azobenzene liquid crystals for short laser pulses”, Liquid Crystals XII, ed. by I.-C. Khoo, Proc. of SPIE, 7050, 705007 1-11 (2008).
- U. A. Hrozhyk, S. V. Serak, N. V. Tabiryan, T. J. Bunning “Optical tuning of the reflection of cholesterics doped with azobenzene liquid crystals”, Adv. Func. Mat. 17, 1735-1742 (2007).
- L. De Sio, A. Veltri, C. Umeton, S. Serak, N. Tabiryan “All-optical switching of holographic gratings made of polymer-liquid-crystal-polymer slices containing azo-compounds”, Appl. Phys. Lett. 93, 181115 (1-3) (2008).
- S.V. Serak, N.V. Tabiryan, “Microwatt power optically controlled spatial solitons in azobenzene liquid crystal”, Proc. of SPIE, Liquid Crystals X, ed. I.-C. Khoo, 6332, 63320-Y1-Y13 (2006).
- U. Hrozhyk, S. Serak, N. Tabiryan, T.J. Bunning, “Wide temperature range azobenzene nematic and smectic LC materials,” Mol. Cryst. & Liq. Cryst. 454, 235-245 (2006).
- S.V. Serak, N.V. Tabiryan, M. Peccianti, G. Assanto, “Spatial soliton all-optical logic gates,” IEEE Photonics Technology Letters, 18 (12), 1287-1289 (2006).
- H. Sarkissian, S. V. Serak, N. V. Tabiryan, L. B. Glebov, V. Rotar, B. Ya. Zeldovich, “Polarization-controlled switching between diffraction orders in transverse-periodically aligned nematic liquid crystals”, Opt. Lett., 31, 2248-2250 (2006).
- N. Tabiryan, U. Hrozhyk, S. Serak, “Nonlinear refraction in photoinduced isotropic state of liquid crystalline azobenzenes,” Phys. Rev. Lett. 93 (11), 113901-1- 113901-4 (2004).
- N.V. Tabiryan, S.V. Serak, V.A. Grozhik, “Photoinduced critical opalescence and reversible all-optical switching in photosensitive liquid crystals,” Journal of Optical Society of America JOSA B, 20 ( 3), 538-544 (2003)
750
900
720
BEAM Co., 809 S. Orlando Ave., Suite I , Winter Park , FL ,
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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