Nano Archive

Photonic nano-structure of R. Gigantea

Suet, Ying Ching and Gui , Xin Li and Hoi, Lam Tam and Goh, D and Goh, J (2010) Photonic nano-structure of R. Gigantea. 2010 IEEE 3rd International Nanoelectronics Conference (INEC 2010) .

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Abstract

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.

Item Type:Article
Additional Information:2010 IEEE 3rd International Nanoelectronics Conference (INEC 2010) Hong Kong, China, 3-8 January 2010
Uncontrolled Keywords:photonic nanostructure; iridescent properties; exocuticle; cholesteric liquid crystals; optical properties; diffraction; reflection spectra; transverse electric modes; transverse magnetic modes; beetle cuticle structure; scanning electron microscope; SEM; refraction index; optimal Bragg condition; linear polarization; Rhomborhina Gigantea
Subjects:Biomedical Science > Nanobiotechnology
Physical Science > Photonics
ID Code:9216
Deposited By:CSMNT
Deposited On:19 May 2010 03:54
Last Modified:19 May 2010 03:54

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