Liang Yong, Peng Chao, Sakai Kyosuke, Iwahashi Seita, Noda Susumu
Department of Electronic Science and Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Kyoto 615-8510, Japan.
Opt Express. 2012 Jul 2;20(14):15945-61. doi: 10.1364/OE.20.015945.
We develop a coupled-wave model that is capable of treating finite-size square-lattice photonic crystal surface emitting lasers with transverse-electric polarization. Various properties of interest including threshold gain, mode frequency, field intensity envelope within the device, far-field pattern, as well as polarization and divergence angle of the output beam for the band-edge modes are calculated. Theoretical predictions of the lowest threshold mode and the output beam profile are in good agreement with our experimental findings. In particular, we show that, contrary to the infinite periodic case, the finite length of the device significantly affects surface emission and mode selection properties of the laser device.
我们开发了一种耦合波模型，该模型能够处理具有横向电偏振的有限尺寸方形晶格光子晶体表面发射激光器。计算了各种感兴趣的特性，包括阈值增益、模式频率、器件内的场强包络、远场图案，以及带边模式下输出光束的偏振和发散角。最低阈值模式和输出光束轮廓的理论预测与我们的实验结果吻合良好。特别是，我们表明，与无限周期情况相反，器件的有限长度会显著影响激光器件的表面发射和模式选择特性。
