Small, low-loss heterogeneous photonic bandedge laser.
Small, low-loss heterogeneous photonic bandedge laser.
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小型、低损耗异质光子带边激光器。
DOI：
10.1364/opex.12.005356
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发表时间：
2004
期刊：
影响因子：
3.8
通讯作者：
Sung
中科院分区：
文献类型：
--
作者：
Soon;Se‐Heon Kim;Sun;Yong;Sung
我们演示了一种新型的非均质光子晶体激光器，一种由光子带隙辅助的五晶格常数大光子带隙激光器，在室温下在三角形晶格中工作。当周围光子晶体（PC）的空穴半径略小于带模区域的空穴半径时，中心区域第一个K点带模的大部分面内损耗被抑制，模式的品质因数大大提高到50000。我们通过光谱位置、近场模式和偏振状态识别出光子带隙-带隙（PBG-BE）激光模式，与三维时域有限差分（FDTD）方法的计算结果吻合良好。通过傅里叶分析验证了第一个K波段的二维反馈机制。由于PBG-BE模式的低光损耗，实现了~ 0.24 mW的低阈值入射峰值泵浦功率。
We have demonstrated the operation of a new type of heterogeneous photonic crystal laser, a five-lattice-constant large photonic bandedge laser assisted by a photonic bandgap, in a triangular lattice at room temperature. When the air hole radius of the surrounding photonic crystal (PC) is slightly smaller than that of the bandedge mode region, most in-plane losses of the first K point bandedge mode in the central region are suppressed and the quality factor of the mode is greatly enhanced to 50000. We identified the photonic bandgap-bandedge (PBG-BE) lasing modes through the spectral position, near-field pattern, and the state of polarization, which correspond well with the results of the three-dimensional (3D) finite-difference time-domain (FDTD) method computation. The two-dimensional (2D) feedback mechanism of the first K bandedge was verified through the Fourier analysis. Low threshold incident peak pump power of ~ 0.24 mW is achieved owing to the low optical loss of the PBG-BE mode.