Open AccessDesign and fabrication of photonic crystal resonators for single-mode and vertical surface emission from strain-compensated quantum cascade lasers operating at 4.32 μm
Author(s) -
Shôzô Saitô,
Ryota Hashimoto,
Kenichi Kaneko,
Tsutomu Kakuno,
Yao Ya,
Naoki Ikeda,
Yoshimasa Sugimoto,
Takaaki Mano,
Takashi Kuroda,
Hirotaka Tanimura,
Shigeyuki Takagi,
Kazuaki Sakoda
Publication year - 2021
Publication title -
applied physics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.911
H-Index - 94
eISSN - 1882-0786
pISSN - 1882-0778
DOI - 10.35848/1882-0786/ac2240
Subject(s) - resonator , photonic crystal , materials science , laser , cascade , optoelectronics , optics , fabrication , photonics , symmetry (geometry) , resonance (particle physics) , quantum well , physics , atomic physics , chemistry , medicine , alternative medicine , chromatography , pathology , geometry , mathematics
Photonic crystal resonators with the C 4v symmetry were designed and fabricated on quantum cascade lasers with a strain-compensated multiple quantum well to achieve single-mode and vertical surface emission at 4.32 μ m. Their fabrication accuracy was confirmed by high-resolution reflection spectroscopy. The maximum output power was 10 mW at 77 K. A far-field pattern with a small divergence angle below 1 degree was observed. Its main peak had a donut shape, which was attributed to the spatial symmetry of the resonance mode of the photonic crystal.