Si photonic crystal slow-light waveguides optimized through informatics technology

Autor:	Keisuke Hirotani, Toshihiko Baba, Ryo Shiratori
Rok vydání:	2021
Předmět:	Materials science business.industry Physics::Optics Slow light Atomic and Molecular Physics and Optics law.invention Wavelength Optics Photonic crystal waveguides law Limit (music) Photonics business Waveguide Refractive index Photonic crystal
Zdroj:	Optics Letters. 46:4422
ISSN:	1539-4794 0146-9592
Popis:	We modeled the photonic bands of S i O 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e626dd3d518bf69f6d7a25d9cd0f936a https://doi.org/10.1364/ol.436118 Zobrazit plný text záznamu