講演情報
[19p-A310-4]Grating Diffraction Select Radial Mode at the Inner Active Cladding of Hybrid-Cavity Microlaser
〇(DC)Jinghan Chen1, Abazi Adrian2,3, Eich Alexander2,3, Tomishige Yoshitaka1, Takeda Harunobu1, Mikami Yuya1, Tate Naoya1, Oki Yuji1, Schuck Carsten2,3, Yoshioka Hiroaki1 (1.Kyushu Univ., 2.Munster Univ., 3.SoN Munster)
キーワード：
On-chip laser、Hybrid-cavity laser、whispering gallery mode
Miniaturized, tunable, on-chip lasers are essential for the development of photonic integrated circuits. However, microlasers with active semiconductor cores face challenges related to design flexibility and the need for precision in fabrication. In this study, to simplify fabrication and provide flexible gain choices, we propose a hybrid-cavity design that combines SiN microring with active polymeric cladding. Although the broad distribution of the active cladding introduces complexity to the mode, we demonstrate the generation and selection of radial modes through grating diffraction at the inner active cladding. The radial mode is partly coupled with whispering gallery modes propagating in the microring. Our results show the successful fabrication of active cladding grating-integrated microring lasers and the mechanism of radial modes generation and selection.