Advanced quantum dot and photonic crystal technologies for integrated nanophotonic circuits

作者：Sugimoto Y^*; Ikeda N; Ozaki N; Watanabe Y; Ohkouchi S; Kuroda T; Mano T; Ochiai T; Kuroda K; Koguchi N; Sakoda K; Asakawa K

来源：Microelectronics Journal, 2009, 40(4-5): 736-740.

DOI：10.1016/j.mejo.2008.11.003

• Photonic crystal
• Quantum dots
• Ultrafast nonlinear optics
• Microcavity
• All-optical switch

Two types of nanophotonic technologies-two-dimensional photonic crystal (2D PC) slab waveguides (WGs) and quantum dots (QDs)-were developed for key photonic device Structures in the future. For an ultrafast digital photonic network, an ultrasmall and ultrafast symmetrical Mach-Zehnder (SMZ)type all-optical switch (PC-SMZ) and an optical flip-flop device (PC-FF) have been developed. To realize these devices, one method is to develop a selective-area molecular beam epitaxial growth QD technique by employing a metal mask method. Another method is to establish a new design method, i.e., topology optimization of the 2DPC WG with a wide and flat bandwidth, high transmittance, and low reflectivity. We also fabricated an optical microcavity in a photonic crystal slab embedded with GaAs QDs by droplet epitaxy. The Purcell effect on the exciton emission of GaAs QDs was confirmed by microphotoluminescence and lifetime measurements.

• 出版日期2009-5