Zero-Index Terahertz Quantum-Cascade Metamaterial Lasers

被引：33
|
作者：
Tavallaee, Amir Ali [1 ,2 ]
Hon, PhilipW. C. [1 ]
Mehta, Karan [1 ,2 ]
Itoh, Tatsuo [1 ]
Williams, Benjamin S. [1 ,2 ]
机构：
[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, CNSI, Los Angeles, CA 90095 USA
来源：
IEEE JOURNAL OF QUANTUM ELECTRONICS | 2010年 / 46卷 / 07期
基金：
美国国家科学基金会;
关键词：
Composite right/left-handed transmission line; quantum-cascade lasers; terahertz active metamaterials; WAVE-GUIDE; MODE;
D O I：
10.1109/JQE.2010.2043642
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We propose a new one-dimensional composite right/left-handed (CRLH) transmission line active metamaterial based upon a sub-wavelength metal waveguide loaded with quantum-cascade material that provides terahertz gain via stimulated emission. Finite element simulations were performed to design and characterize a one-dimensional CRLH metamaterial supporting "backward" waves in the range of 1-2 THz. The addition of capacitive gaps in the top metal and inductive virtual current paths from top contact to the ground plane of a metal-metal quantum-cascade waveguide introduces propagating negative index and zero-index modes. We evaluate the feasibility of a zero-index terahertz quantum-cascade laser, based on a CRLH resonator, which exhibits a uniform spatial mode that is immune to spatial hole burning. An alternate balanced design for traveling-wave applications is also discussed.
引用
收藏
页码：1091 / 1098
页数：8
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