Abstract

The reflection, transmission, optical activity, and extinction ratio of a series of mixtures of cholesteryl oleyl carbonate, cholesteryl nonanoate, and cholesteryl chloride of different proportions were measured. The wavelength of minimum transmission (λ0), maximum rate of change of optical activity, and minimum extinction ratio were found nearly to coincide. The bandwidth of these phenomena is of the order of 500 Å. The optical rotation asymptotically approaches plus and minus infinity at λ0. The variation of λ0 with temperature is linear between 20°C and 35°C with a slope of 50 Å°C−1. By varying the composition, λ0 could be varied from 5000 Å to 11000 Å.

© 1971 Optical Society of America

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References

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  1. W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).
  2. L. C. Scala, S. L. Johnson, N. N. Goldberg, Final Rept., Contr. NObs-94304, Naval Ships System Command, Dept. of the Navy (1966).
  3. W. J. Harper, Mol. Cryst. 1, 325 (1966).
    [CrossRef]
  4. J. R. Hansen, R. J. Schneeberger, IEEE Trans. Electron Devices ED-15, 11, 896 (1968).
  5. J. R. Hansen, R. J. Schneeberger, Tech. Rept. AFAL-TR-67-92, Air Force Avionics Lab. (1967).
  6. L. Melamed, D. Rubin, Appl. Phys. Lett. 16, 4, 149 (1970).
    [CrossRef]
  7. J. J. Wysocki, J. Adams, W. Haas, Phys. Rev. Lett. 20, 19, 1024 (1968).
    [CrossRef]
  8. G. H. Brown, G. J. Dienes, M. M. Labes, in Liquid Crystals, J. L. Fergason, Ed. (Gordon and Breach, New York, 1966), p. 89.
  9. H. De Vries, Acta Cryst. 4, 219 (1951).
    [CrossRef]
  10. J. Adams, W. Haas, J. Wysocki, Phys. Rev. Lett. 22, 3, 92 (1969).
    [CrossRef]
  11. J. Adams, W. Haas, J. Wysocki, J. Chem. Phys. 50, 62458 (1969).
    [CrossRef]

1970 (1)

L. Melamed, D. Rubin, Appl. Phys. Lett. 16, 4, 149 (1970).
[CrossRef]

1969 (3)

W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).

J. Adams, W. Haas, J. Wysocki, Phys. Rev. Lett. 22, 3, 92 (1969).
[CrossRef]

J. Adams, W. Haas, J. Wysocki, J. Chem. Phys. 50, 62458 (1969).
[CrossRef]

1968 (2)

J. R. Hansen, R. J. Schneeberger, IEEE Trans. Electron Devices ED-15, 11, 896 (1968).

J. J. Wysocki, J. Adams, W. Haas, Phys. Rev. Lett. 20, 19, 1024 (1968).
[CrossRef]

1966 (1)

W. J. Harper, Mol. Cryst. 1, 325 (1966).
[CrossRef]

1951 (1)

H. De Vries, Acta Cryst. 4, 219 (1951).
[CrossRef]

Adams, J.

J. Adams, W. Haas, J. Wysocki, Phys. Rev. Lett. 22, 3, 92 (1969).
[CrossRef]

J. Adams, W. Haas, J. Wysocki, J. Chem. Phys. 50, 62458 (1969).
[CrossRef]

J. J. Wysocki, J. Adams, W. Haas, Phys. Rev. Lett. 20, 19, 1024 (1968).
[CrossRef]

Brown, G. H.

G. H. Brown, G. J. Dienes, M. M. Labes, in Liquid Crystals, J. L. Fergason, Ed. (Gordon and Breach, New York, 1966), p. 89.

De Vries, H.

H. De Vries, Acta Cryst. 4, 219 (1951).
[CrossRef]

Dienes, G. J.

G. H. Brown, G. J. Dienes, M. M. Labes, in Liquid Crystals, J. L. Fergason, Ed. (Gordon and Breach, New York, 1966), p. 89.

Goldberg, N. N.

L. C. Scala, S. L. Johnson, N. N. Goldberg, Final Rept., Contr. NObs-94304, Naval Ships System Command, Dept. of the Navy (1966).

Haas, W.

J. Adams, W. Haas, J. Wysocki, Phys. Rev. Lett. 22, 3, 92 (1969).
[CrossRef]

J. Adams, W. Haas, J. Wysocki, J. Chem. Phys. 50, 62458 (1969).
[CrossRef]

J. J. Wysocki, J. Adams, W. Haas, Phys. Rev. Lett. 20, 19, 1024 (1968).
[CrossRef]

Hansen, J. R.

J. R. Hansen, R. J. Schneeberger, IEEE Trans. Electron Devices ED-15, 11, 896 (1968).

J. R. Hansen, R. J. Schneeberger, Tech. Rept. AFAL-TR-67-92, Air Force Avionics Lab. (1967).

Harper, W. J.

W. J. Harper, Mol. Cryst. 1, 325 (1966).
[CrossRef]

Hoffman, P. E.

W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).

Johnson, S. L.

L. C. Scala, S. L. Johnson, N. N. Goldberg, Final Rept., Contr. NObs-94304, Naval Ships System Command, Dept. of the Navy (1966).

Labes, M. M.

G. H. Brown, G. J. Dienes, M. M. Labes, in Liquid Crystals, J. L. Fergason, Ed. (Gordon and Breach, New York, 1966), p. 89.

Melamed, L.

L. Melamed, D. Rubin, Appl. Phys. Lett. 16, 4, 149 (1970).
[CrossRef]

Roach, C. G.

W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).

Roundy, R. W.

W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).

Rubin, D.

L. Melamed, D. Rubin, Appl. Phys. Lett. 16, 4, 149 (1970).
[CrossRef]

Scala, L. C.

L. C. Scala, S. L. Johnson, N. N. Goldberg, Final Rept., Contr. NObs-94304, Naval Ships System Command, Dept. of the Navy (1966).

Schneeberger, R. J.

J. R. Hansen, R. J. Schneeberger, IEEE Trans. Electron Devices ED-15, 11, 896 (1968).

J. R. Hansen, R. J. Schneeberger, Tech. Rept. AFAL-TR-67-92, Air Force Avionics Lab. (1967).

Toliver, W. H.

W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).

Wysocki, J.

J. Adams, W. Haas, J. Wysocki, Phys. Rev. Lett. 22, 3, 92 (1969).
[CrossRef]

J. Adams, W. Haas, J. Wysocki, J. Chem. Phys. 50, 62458 (1969).
[CrossRef]

Wysocki, J. J.

J. J. Wysocki, J. Adams, W. Haas, Phys. Rev. Lett. 20, 19, 1024 (1968).
[CrossRef]

Acta Cryst. (1)

H. De Vries, Acta Cryst. 4, 219 (1951).
[CrossRef]

Aerospace Med. (1)

W. H. Toliver, C. G. Roach, R. W. Roundy, P. E. Hoffman, Aerospace Med. 40, 1, 35 (1969).

Appl. Phys. Lett. (1)

L. Melamed, D. Rubin, Appl. Phys. Lett. 16, 4, 149 (1970).
[CrossRef]

IEEE Trans. Electron Devices (1)

J. R. Hansen, R. J. Schneeberger, IEEE Trans. Electron Devices ED-15, 11, 896 (1968).

J. Chem. Phys. (1)

J. Adams, W. Haas, J. Wysocki, J. Chem. Phys. 50, 62458 (1969).
[CrossRef]

Mol. Cryst. (1)

W. J. Harper, Mol. Cryst. 1, 325 (1966).
[CrossRef]

Phys. Rev. Lett. (2)

J. J. Wysocki, J. Adams, W. Haas, Phys. Rev. Lett. 20, 19, 1024 (1968).
[CrossRef]

J. Adams, W. Haas, J. Wysocki, Phys. Rev. Lett. 22, 3, 92 (1969).
[CrossRef]

Other (3)

G. H. Brown, G. J. Dienes, M. M. Labes, in Liquid Crystals, J. L. Fergason, Ed. (Gordon and Breach, New York, 1966), p. 89.

J. R. Hansen, R. J. Schneeberger, Tech. Rept. AFAL-TR-67-92, Air Force Avionics Lab. (1967).

L. C. Scala, S. L. Johnson, N. N. Goldberg, Final Rept., Contr. NObs-94304, Naval Ships System Command, Dept. of the Navy (1966).

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Figures (10)

Fig. 1
Fig. 1

Apparatus for selective reflectance measurements.

Fig. 2
Fig. 2

Apparatus for optical rotation measurements.

Fig. 3
Fig. 3

Reflectance of a 32% cholesteryl chloride trimixture at 26°C.

Fig. 4
Fig. 4

Optical activity of a 50-μ thick, 32% cholesteryl chloride trimixture.

Fig. 5
Fig. 5

Extinction ratio (Fig. 4 sample).

Fig. 6
Fig. 6

Shift of minimum transmission with temperature (Fig. 4 sample).

Fig. 7
Fig. 7

Optical activity and extinction ratio temperature dependence for a 50-μ thick sample (34% cholesteryl chloride) at 6328 Å.

Fig. 8
Fig. 8

Variation of wavelength of selective reflection with percent cholesteryl chloride composition (20°C and normal incidence).

Fig. 9
Fig. 9

Dependence of reflectance peak and reflectance bandwidth on composition (20°C).

Fig. 10
Fig. 10

Reflectance and optical activity of 50-μ thick trimixture samples containing 28%, 36%, 41%, and 44%, respectively, of cholesteryl chloride (20°C).

Equations (2)

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λ = λ N { cos 1 2 [ sin - 1 ( 2 3 sin ϕ i ) + sin - 1 ( 2 3 sin ϕ D ) ] } ,
ψ Z = - 2 π α 2 8 p λ 1 2 ( 1 - λ 1 2 ) ,

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