Quantum cascade disk lasers

Quantum cascade disk lasers
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DOI:
10.1063/1.117496
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发表时间:
1996-10-21
影响因子:
4
通讯作者:
Cho, AY
Cho, AY
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Faist, J;Gmachl, C;Cho, AY

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报道了 5 μm 波长量子级联 (QC) 圆盘激光器的制造和表征。 QC 方案为磁盘几何形状带来了几个优点:固有的横向磁极化、可定制的波长和单极载流子传输。低损耗回音壁谐振器允许使用直径为 17-125 μm 的小型设备和低阈值电流(17 μm 直径盘为 2.85 mA),在 15 K 时具有 1.2 kAcm(-2) 的与尺寸无关的脉冲阈值电流密度。根据阈值电流密度,盘的品质因数估计为 Q 值,类似于 3500。发射光谱显示单次和多次回音 画廊模式。 (C) 1996 年美国物理研究所。
The fabrication and characterization of quantum cascade (QC) disk lasers at 5 mu m wavelength is reported. The QC scheme yields several advantages for the disk geometry: an inherently transverse magnetic polarization, tailorable wavelength, and unipolar carrier transport. The low loss whispering gallery resonator allows small devices, 17-125 mu m in diameter, and low threshold currents (2.85 mA for a 17 mu m diameter disk) with a size independent pulsed threshold current density of 1.2 kAcm(-2) at 15 K. From the threshold current density the quality factor of the disks is estimated at Q similar to 3500. The emission spectra show single and multiple whispering gallery modes. (C) 1996 American Institute of Physics.