THz Surface Emission by Difference Frequency Generation in Quantum Cascade Lasers

被引：0
作者：
Demmerle, F. [1 ]
Burghart, D. [1 ]
Oberhausen, W. [1 ]
Wolf, A. [1 ]
Veerabathran, G. K. [1 ]
Krakofsky, J. [1 ]
Schmeiduch, H. [1 ]
Boehm, G. [1 ]
Amann, M-C [1 ]
机构：
[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany
来源：
2017 42ND INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) | 2017年
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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 present THz surface emission by difference frequency generation in nonlinear quantum cascade lasers operating at room temperature. The device comprises two separate, transversely superimposed gratings, one for selective feedback of the mid-infrared modes and one for surface emission of the generated THz radiation. The mid-infrared grating is realized as a higher order, loss-coupled distributed feedback grating for single mode emission at two distinct wavelengths. It defines the spatial distribution of the nonlinear polarization wave, which allows for precise placement of the second order top grating for surface emission.
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