[10a-B11-1~12] 3.10 Photonic structures and phenomena

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[10a-B11-10] Investigation of Hermitian and non-Hermitian coupling coefficient control in PCSELs incorporating DBR layers above and below the photonic-crystal layer

〇(D)Kotaro Okuda¹, Masahiro Yoshida¹, Shumpei Katsuno², Takuya Inoue¹, Menaka De Zoysa¹, Kenji Ishizaki², Susumu Noda^2,1 (1.Fac. Eng. Kyoto Univ., 2.KUIAS)

Keywords:

PCSEL,DBR layer,coupling-coefficient control

In this study, we proposed and analyzed a PCSEL structure with DBR layers above and below the PC layer as a new design approach for controlling the coupling coefficients. By controlling the round-trip phase of the top-side DBR layer with an intensity reflectivity of approximately 50%, we showed that the tunable range of the Hermitian and non-Hermitian coupling coefficients can be expanded to about three times, or reduced to about 0.4 times, that of the conventional structure while maintaining the optical confinement factor in the PC layer.