[16a-2F-1~12] 3.14 Optical control devices and optical fibers

△ [16a-2F-7] Experimental Study on Reflection Phase Rotation of Cavity-resonator-integrated Guided-mode Resonance Filter

〇Junichi Inoue¹, Hiroki Okuda¹, Kenji Kintaka², Kenzo Nishio¹, Shogo Ura¹ (1.Kyoto Inst. Tech., 2.AIST)

Keywords:Wavelength filters,Guided-mode resonance,Waveguide cavities

A cavity-resonator-integrated guided-mode resonance filter (CRIGF) consisting of a grating coupler (GC) between two distributed Bragg reflectors (DBRs) on a waveguide on a transparent substrate has been proposed to provide a narrow-band reflection spectrum for an incident wave of a small diameter from the free space. A CRIGF shows a strong dependence of a reflection phase on a wavelength. A reflection phase variation of 2π, namely, reflection phase rotation, would be very attractive for a high-density packaging of short-cavity lasers because it is expected that a lasing occurs at the resonance wavelength of the CRIGF, regardless of a cavity length. Therefore, it is important to study the feasibility of the phase rotation. In this work, a dependence of the phase variation on a waveguide thickness of CRIGF was discussed with experimental results.