Abstract

The moth’s eye principle of optical-impedance matching by means of an array of tapered protuberances has been studied to determine the limit obtainable for reflection reduction. Analogous multilayer equivalents were optimized over a wide band, using a recently developed optimization method, in which one or more of the layers are specified inclusions. A limit of 30 dB reduction of reflectance was obtained over a bandwidth 1.4 times the short-wavelength limit of the band. These results are also related to corrugated conducting surfaces used in a new solar-absorber design that uses corrugations in a conductor and is required to be optimized for best absorption (<i>a</i>) and emissivity (<i>e</i>) values. The optimum corrugation geometry for two types of periodic surface is studied and results are discussed in view of further development in practical applications.

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  1. C. G. Bernhard, Endeavour 26, 79 (1967).
  2. P. B. Clapman and M. C. Hutley, Nature 244, 281 (1973).
  3. H. G. Haddenhorst, Z. Angew. Phys. 7, 487 (1955).
  4. B. S. Thornton, Computer J. 15, 84 (1972).
  5. V. F. Wiekhorst, Z. Angew. Phys. 10, 173 (1957).
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  7. J. R. Wait, IRE Trans. Antennas and Propagation, AP-7, S154 (1959).
  8. J. R. Wait and A. M. Conda, J. Res. Natl. Bur. Stds. 59, 307 (1957).
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  11. B. S. Thornton, J. Opt. Soc. Am. 49, 476 (1959).
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  13. H. Ikuno and K. Yasuura, IEEE Trans. AP-21, 657 (1973).
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  15. Lord Rayleigh, Proc. R. Soc., Ser. A 79, 399 (1907).
  16. R. Petit and M. Cadilhac, C. R. Acad. Sci. (Paris), Ser. B 262, 468 (1966).
  17. R. F. Millar, Proc. R. Soc. (Lond.) 69, 217 (1971).
  18. R. F. Millar, Radio Sci. 8, 607 (1973).
  19. M. C. Hutley, Opt. Acta 20, 8, 607 (1973).
  20. A. Roberts and B. Van Hippel, J. Appl. Phys. 17, 610 (1946).
  21. W. E. Desorbo and H. E. Kline, J. Appl. Phys. 41, 2099 (1970).
  22. S. Butterworth, Proc. R. Soc. (Lond.) 107, 693 (1925).
  23. P. J. Selgin, Electrical Transmission in Steady State (McGraw-Hill, New York, 1946).
  24. G. D. Holah and S. D. Smith, J. Phys. D 5, 496 (1972).

Bernhard, C. G.

C. G. Bernhard, Endeavour 26, 79 (1967).

Butterworth, S.

S. Butterworth, Proc. R. Soc. (Lond.) 107, 693 (1925).

Cadilhac, M.

R. Petit and M. Cadilhac, C. R. Acad. Sci. (Paris), Ser. B 262, 468 (1966).

Cha, A. G.

A. G. Cha and J. K. Hsiao, IEEE- Trans. AP-22 106 (1974).

Clapman, P. B.

P. B. Clapman and M. C. Hutley, Nature 244, 281 (1973).

Conda, A. M.

J. R. Wait and A. M. Conda, J. Res. Natl. Bur. Stds. 59, 307 (1957).

Desorbo, W. E.

W. E. Desorbo and H. E. Kline, J. Appl. Phys. 41, 2099 (1970).

Galindo, V.

C. P. Wu and V. Galindo, IEEE Trans. AP-14, 163 (1966).

Goldstone, L. O.

L. O. Goldstone and A. A. Oliner, IRE Trans. AP-7, 274 (1959).

Haddenhorst, H. G.

H. G. Haddenhorst, Z. Angew. Phys. 7, 487 (1955).

Hippel, B. Van

A. Roberts and B. Van Hippel, J. Appl. Phys. 17, 610 (1946).

Holah, G. D.

G. D. Holah and S. D. Smith, J. Phys. D 5, 496 (1972).

Horwitz, C. M.

C. M. Horwitz, Opt. Commun. 11, 210 (1974).

Hsiao, J. K.

A. G. Cha and J. K. Hsiao, IEEE- Trans. AP-22 106 (1974).

Hutley, M. C.

M. C. Hutley, Opt. Acta 20, 8, 607 (1973).

P. B. Clapman and M. C. Hutley, Nature 244, 281 (1973).

Ikuno, H.

H. Ikuno and K. Yasuura, IEEE Trans. AP-21, 657 (1973).

Kline, H. E.

W. E. Desorbo and H. E. Kline, J. Appl. Phys. 41, 2099 (1970).

Millar, R. F.

R. F. Millar, Proc. R. Soc. (Lond.) 69, 217 (1971).

R. F. Millar, Radio Sci. 8, 607 (1973).

Neureuther, A. R.

K. H. Zaki and A. R. Neureuther, IEEE Trans AP-19 (2), 208 (1971); IEEE Trans. AP-19(6), 747 (1971).

Oliner, A. A.

L. O. Goldstone and A. A. Oliner, IRE Trans. AP-7, 274 (1959).

Petit, R.

R. Petit and M. Cadilhac, C. R. Acad. Sci. (Paris), Ser. B 262, 468 (1966).

Rayleigh, Lord

Lord Rayleigh, Proc. R. Soc., Ser. A 79, 399 (1907).

Roberts, A.

A. Roberts and B. Van Hippel, J. Appl. Phys. 17, 610 (1946).

Selgin, P. J.

P. J. Selgin, Electrical Transmission in Steady State (McGraw-Hill, New York, 1946).

Smith, S. D.

G. D. Holah and S. D. Smith, J. Phys. D 5, 496 (1972).

Thornton, B. S.

B. S. Thornton, Computer J. 15, 84 (1972).

B. S. Thornton, J. Opt. Soc. Am. 49, 476 (1959).

Wait, J. R.

J. R. Wait, IRE Trans. Antennas and Propagation, AP-7, S154 (1959).

J. R. Wait and A. M. Conda, J. Res. Natl. Bur. Stds. 59, 307 (1957).

Wiekhorst, V. F.

V. F. Wiekhorst, Z. Angew. Phys. 10, 173 (1957).

Wu, C. P.

C. P. Wu and V. Galindo, IEEE Trans. AP-14, 163 (1966).

Yasuura, K.

H. Ikuno and K. Yasuura, IEEE Trans. AP-21, 657 (1973).

Zaki, K. H.

K. H. Zaki and A. R. Neureuther, IEEE Trans AP-19 (2), 208 (1971); IEEE Trans. AP-19(6), 747 (1971).

Other

C. G. Bernhard, Endeavour 26, 79 (1967).

P. B. Clapman and M. C. Hutley, Nature 244, 281 (1973).

H. G. Haddenhorst, Z. Angew. Phys. 7, 487 (1955).

B. S. Thornton, Computer J. 15, 84 (1972).

V. F. Wiekhorst, Z. Angew. Phys. 10, 173 (1957).

C. M. Horwitz, Opt. Commun. 11, 210 (1974).

J. R. Wait, IRE Trans. Antennas and Propagation, AP-7, S154 (1959).

J. R. Wait and A. M. Conda, J. Res. Natl. Bur. Stds. 59, 307 (1957).

C. P. Wu and V. Galindo, IEEE Trans. AP-14, 163 (1966).

A. G. Cha and J. K. Hsiao, IEEE- Trans. AP-22 106 (1974).

B. S. Thornton, J. Opt. Soc. Am. 49, 476 (1959).

L. O. Goldstone and A. A. Oliner, IRE Trans. AP-7, 274 (1959).

H. Ikuno and K. Yasuura, IEEE Trans. AP-21, 657 (1973).

K. H. Zaki and A. R. Neureuther, IEEE Trans AP-19 (2), 208 (1971); IEEE Trans. AP-19(6), 747 (1971).

Lord Rayleigh, Proc. R. Soc., Ser. A 79, 399 (1907).

R. Petit and M. Cadilhac, C. R. Acad. Sci. (Paris), Ser. B 262, 468 (1966).

R. F. Millar, Proc. R. Soc. (Lond.) 69, 217 (1971).

R. F. Millar, Radio Sci. 8, 607 (1973).

M. C. Hutley, Opt. Acta 20, 8, 607 (1973).

A. Roberts and B. Van Hippel, J. Appl. Phys. 17, 610 (1946).

W. E. Desorbo and H. E. Kline, J. Appl. Phys. 41, 2099 (1970).

S. Butterworth, Proc. R. Soc. (Lond.) 107, 693 (1925).

P. J. Selgin, Electrical Transmission in Steady State (McGraw-Hill, New York, 1946).

G. D. Holah and S. D. Smith, J. Phys. D 5, 496 (1972).

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