用于太赫兹源的大型Bi2212台面的热管理
Thermal Management in Large Bi2212 Mesas used for Terahertz Sources
摘要：
我们提出了一个图案化的台面上的Bi 2Sr 2CaCu 2 O 8（Bi 2212）单晶，是基于隧道特性的c轴堆叠的台面中的~800本征约瑟夫森结的热分析。尽管台面体积大（例如，40x300x1.2微米3）和功率耗散，导致电流-电压曲线（I-V）的自加热和回弯，存在可以观察到显著极化太赫兹波发射的可接近的偏置条件。我们通过将准粒子电阻Rqp（T）与包括回弯区域在内的整个I-V上的V/I比相等来估计台面温度。这些温度用于预测到达我们的测辐射热计的非偏振黑体辐射，并且在整个I-V上存在实质性的一致性。因此，回弯由Bi 2212的特定Rqp（T）引起，如芬顿首先讨论的，而不是对能隙的显著抑制。该模型还正确地预测了在~60 K以上观察到的回弯消失。
英文摘要：
We present a thermal analysis of a patterned mesa on a Bi2Sr2CaCu2O8 (Bi2212) single crystal that is based on tunneling characteristics of the c-axis stack of ~800 intrinsic Josephson junctions in the mesa. Despite the large mesa volume (e.g., 40x300x1.2 micron3) and power dissipation that result in selfheating and backbending of the current-voltage curve (I-V), there are accessible bias conditions for which significant polarized THz-wave emission can be observed. We estimate the mesa temperature by equating the quasiparticle resistance, Rqp(T), to the ratio V/I over the entire I-V including the backbending region. These temperatures are used to predict the unpolarized black-body radiation reaching our bolometer and there is substantial agreement over the entire I-V. As such, backbending results from the particular Rqp(T) for Bi2212, as first discussed by Fenton, rather than a significant suppression of the energy gap. This model also correctly predicts the observed disappearance of backbending above ~60 K.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
