Photonic nano-structure of R. Gigantea

Suet Ying Ching, Guixin LI, Hoi Lam TAM, David T.P. Goh, Joseph K.L. Goh, Kok Wai CHEAH

Research output: Chapter in book/report/conference proceedingConference proceedingpeer-review

1 Citation (Scopus)


Rhomborhina Gigantea (R. Gigantea) was examined for its iridescent properties in its exocuticle. The iridescence was explained by the theories of the optical reflectors causing the structural colors and the concepts of cholesteric liquid crystals (CLCs). The exocuticle was examined for its optical properties through experiments of reflection and diffraction. Reflection spectra showed contrast results in transverse electric (TE) and transverse magnetic (TM) modes. The cross-section of the beetle cuticle structure was investigated using scanning electron microscope (SEM). The experimental values of average refraction index (nav) and the half-pitch (Ph) were derived from the optimal Bragg condition. The observed Ph from SEM images was similar to the experimental values in linear polarization. The average refractive indices determined from the optical data in both TE and TM modes were in god agreement to the predicted value. The consistency of the results implied that the structure responsible for the iridescent beetle was a biological analogue to CLCs.

Original languageEnglish
Title of host publicationINEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings
Number of pages2
Publication statusPublished - 2010
Event2010 3rd International Nanoelectronics Conference, INEC 2010 - Hongkong, China
Duration: 3 Jan 20108 Jan 2010

Publication series

NameINEC 2010 - 2010 3rd International Nanoelectronics Conference, Proceedings


Conference2010 3rd International Nanoelectronics Conference, INEC 2010

Scopus Subject Areas

  • Electrical and Electronic Engineering


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