[11a-B11-1~11] 3.10 Photonic structures and phenomena

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[11a-B11-11] All-Optical Excitonic Switch Based on an Embedded Multiple-Quantum-Well Photonic Crystal Cavity

〇Masato Takiguchi^1,2, Jona Zollner², Kengo Nozai^1,2, Naotomo Takemura², Takuro Fujii^1,3, Hisashi Sumikura^1,2, Shinji Matsuo^1,3, Masaya Notomi^1,2,4 (1.NTT NPC, 2.NTT BRL, 3.NTT DTL, 4.Science Tokyo)

Keywords:

photonic crystal,exciton,cavity

In this study, we aim to realize a low-energy all-optical switch utilizing excitonic effects by combining an L3 photonic crystal cavity, Al-based multiple quantum wells (MQWs), and a buried regrowth structure [1]. In particular, buried Al-based MQWs not only suppress electron leakage owing to the high potential barrier in the conduction band, but also exhibit a sharp excitonic absorption spectrum. These characteristics are expected to enable high-temperature operation, large excitonic absorption modulation (including saturable absorption and cavity linewidth variation), and cavity resonance wavelength shifts induced by refractive index changes.
[1] M. Takiguchi, et.al., Appl. Phys. Lett., 118, 111101 (2021), Selected as an Editors' Pick