Vitiello Miriam S, Xu Ji-Hua, Kumar Mirgender, Beltram Fabio, Tredicucci Alessandro, Mitrofanov Oleg, Beere Harvey E, Ritchie David A
CNR-Istituto Nazionale di Fisica Applicata Nello Carrara, Sesto Fiorentino, Italy.
Opt Express. 2011 Jan 17;19(2):1122-30. doi: 10.1364/OE.19.001122.
We demonstrate that azimuthally polarized surface emitting Terahertz quantum cascade lasers fabricated in a micro-ring resonator geometry can be coupled to cylindrical hollow aluminum waveguides reaching efficiencies as high ≈98%, when a collimating lens is used. By placing the waveguide in close contact with the QCL in a simple back-to-back geometry, the laser mode can be perfectly matched with the low loss TE(01) waveguide mode showing attenuation losses as low as ≈2.3-2.7 dB/m at 3.2 THz.
我们证明，当使用准直透镜时，采用微环谐振器结构制造的方位角偏振表面发射太赫兹量子级联激光器可以耦合到圆柱形空心铝波导中，耦合效率高达约98%。通过将波导以简单的背对背结构与量子级联激光器紧密接触，激光模式可以与低损耗的TE(01)波导模式完美匹配，在3.2太赫兹时显示出低至约2.3-2.7分贝/米的衰减损耗。
