Abstract
We modeled the photonic bands of ${\rm SiO}_2$-cladded Si lattice-shifted photonic crystal waveguides via machine learning and found a structure that generates low-dispersion slow light with a group index of approximately 20 in the full C-band at telecom wavelengths. The normalized delay-bandwidth product is as large as 0.45, which is close to the theoretical upper limit. The transition structure between this waveguide and a Si-channel waveguide was designed using an evolutional optimization, and a C-band average loss of 0.116 dB/transition was calculated. These results prove the possibility of further enhancing the versatility of slow light.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Ryo Shiratori, Masaya Nakata, Kosuke Hayashi, and Toshihiko Baba
Opt. Lett. 46(8) 1904-1907 (2021)
Sebastian A. Schulz, Jeremy Upham, Liam O’Faolain, and Robert W. Boyd
Opt. Lett. 42(16) 3243-3246 (2017)
Yosuke Terada, Kenji Miyasaka, Keisuke Kondo, Norihiro Ishikura, Takuya Tamura, and Toshihiko Baba
Opt. Lett. 42(22) 4695-4698 (2017)