[20p-E207-1~15] 3.11 フォトニック構造・現象

[20p-E207-4] Creation of a photonic Dirac cone at mid-infrared wavelength on an SOI slab wave guide

〇Takashi Kuroda¹、Yuanzhao Yao¹、Naoki Ikeda¹、Yoshimasa Sugimoto¹、Kazuaki Sakoda¹ (1.NIMS)

キーワード：photonic Dirac cone, SOI, photonic crystal slab

Photonic Dirac cone is a photonic analog of the linear-dispersion electronic state of graphene. Accidental degeneracy between two different eigenstates leads to create a Dirac cone even at the center of Brillouin zone (Gamma point), which thus makes it possible to design various unique optical devices, which include scattering-free waveguides. To date we have theoretically investigated conditions to achieve the accidental degeneracy [1]. Here we have successfully fabricated and measured a photonic Dirac cone at Gamma point in a sample based on commercially available SOI substrates. This work is supported by ATLA.
[1] K. Sakoda, Optics Express 20, 3898 (2011); ibid. 20, 9925 (2011), ibid. 20, 25181 (2011).