[17p-A201-1~15] 3.1 Basic optics and frontier of optics (merged with formerly 3.2 Equipment optics and materials)

[17p-A201-2] Principles of specific structural color of tiger beetle (Cicindela Japonica)

〇Kazuma Ito¹, Kazuma Yamashita¹, Kuwahara Yuji¹, Hattori Takuma¹, Saito Akira¹ (1.Osaka Univ.)

Keywords:structural color

Tiger beetle (C. Japonica) is a species belonging to the family of Cicindelidae. This species has interesting optical properties, such as various colors in the forewing (red, green, white, blue) and the difference of luster between forewing and ventral side. We investigated the microstructures of tiger beetle to elucidate the origin of its optical properties. As a result, the red and green colors in forewings were found to derive from multilayer interference, whereas the blue and white colors were suggested to relate to pigment. Moreover, by modeling the surface microstructure on the forewing and simulating it using finite-difference time-domain method (FDTD method), the difference of luster between the forewing and ventral side was found to originate in the surface microstructure.