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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 9 — Mar. 20, 1998
  • pp: 1579–1584

Effects of a butterfly scale microstructure on the iridescent color observed at different angles

Haruna Tada, Seth E. Mann, Ioannis N. Miaoulis, and Peter Y. Wong  »View Author Affiliations


Applied Optics, Vol. 37, Issue 9, pp. 1579-1584 (1998)
http://dx.doi.org/10.1364/AO.37.001579


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Abstract

Multilayer thin-film structures in butterfly wing scales produce a colorful iridescence from reflected sunlight. Because of optical phenomena, changes in the angle of incidence of light and the viewing angle of an observer result in shifts in the color of butterfly wings. Colors ranging from green to purple, which are due to nonplanar specular reflection, can be observed on Papilio blumei iridescent scales. This refers to a phenomenon in which the curved surface patterns in the thin-film structure cause the specular component of the reflected light to be directed at various angles while affecting the spectral reflectivity at the same time by changing the optical path length through the structure. We determined the spectral reflectivities of P. blumei iridescent scales numerically by using models of a butterfly scale microstructure and experimentally by using a microscale-reflectance spectrometer. The numerical models accurately predict the shifts in spectral reflectivity observed experimentally.

© 1998 Optical Society of America

OCIS Codes
(000.1430) General : Biology and medicine
(240.0240) Optics at surfaces : Optics at surfaces
(310.6860) Thin films : Thin films, optical properties

History
Original Manuscript: June 20, 1997
Revised Manuscript: September 8, 1997
Published: March 20, 1998

Citation
Haruna Tada, Seth E. Mann, Ioannis N. Miaoulis, and Peter Y. Wong, "Effects of a butterfly scale microstructure on the iridescent color observed at different angles," Appl. Opt. 37, 1579-1584 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-9-1579


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References

  1. I. N. Miaoulis, P. Y. Wong, B. D. Heilman, “The effect of microscale and macroscale patterns on the radiative heating of multilayer thin-film structures,” in Microscale Heat Transfer, Vol. 291 of ASME Heat Transfer Proceedings Series (American Society of Mechanical Engineers, New York, 1994), pp. 27–34.
  2. H. Ghiradella, “Structure of iridescent lepidopteran scales: variations on several themes,” Ann. Entomol. Soc. Am. 77, 637–645 (1984).
  3. B. D. Heilman, “Butterfly thin-films: thermoregulatory structures which control solar radiation absorption,” M. S. thesis (Tufts University, Medford, Mass., 1994).
  4. H. Ghiradella, “Structure and development of iridescent lepidopteran scales: the papilionidae as a showcase family,” Ann. Entomol. Soc. Am. 78, 254–264 (1985).
  5. P. Y. Wong, I. N. Miaoulis, H. Tada, S. Mann, “Selective multilayer thin-film development in insects,” in ASME Fundamentals of Microscale Biothermal Phenomena (American Society of Mechanical Engineers, New York, 1997).
  6. J. B. Hoppert, “Numerical modeling of radiative properties of patterned wafers with sub-micron features,” in Rapid Thermal and Integrated Processing V, Vol. 429 of the Materials Research Society Proceedings Series (Materials Research Society, Pittsburgh, Pa., 1996), pp. 51–56.
  7. P. Y. Wong, I. N. Miaoulis, “Microscale reflectance spectrometry of thin-film structures in butterfly wing scales,” in Advances in Heat and Mass Transfer in Biotechnology, Vol. 322 of ASME Heat Transfer Proceedings Series (American Society of Mechanical Engineers, New York, 1995), pp. 5–10.
  8. F. P. Incropera, D. P. De Witt, Introduction to Heat Transfer, 2nd ed. (Wiley, New York, 1990), p. 693.

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