| Autor: |
Inoue, Takuya, Maeda, Kentaro, Yoshida, Masahiro, Gelleta, John, Katsuno, Shumpei, Ishizaki, Kenji, De Zoysa, Menaka, Noda, Susumu |
| Zdroj: |
IEEE Journal on Selected Topics in Quantum Electronics; 2025, Vol. 31 Issue: 1 p1-8, 8p |
| Abstrakt: |
Photonic-crystal surface-emitting lasers (PCSELs), which are based on a two-dimensional (2D) optical resonance at a band edge of a photonic band structure, feature ultra-large-area single-mode lasing oscillation with scalable output power. In this paper, we theoretically investigate the influence of the band-edge frequency non-uniformity in ultra-large-area PCSELs, which can be caused by carrier-induced or temperature-induced refractive-index change during operation. First, we perform a perturbation analysis to derive an analytical condition to maintain single-mode lasing in the presence of the band-edge frequency non-uniformity, and reveal that it is important to increase not only the threshold gain difference but also the frequency difference between the fundamental mode and higher-order modes. Next, we perform numerical simulations on lasing characteristics of 3-mm-diameter PCSELs with non-uniform band-edge frequency distributions, and investigate the robust design against gradually changed frequency distributions or random frequency fluctuations. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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