Multifrequency focusing and wide angular scanning of terajets
Multifrequency focusing and wide angular scanning of terajets
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DOI：
10.1364/ol.40.000245
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发表时间：
2015-01-15
期刊：
影响因子：
3.6
通讯作者：
Minin, O. V.
中科院分区：
文献类型：
--
作者：
Pacheco-Pena, V.;Beruete, M.;Minin, O. V.
在过去，它已经被证明，它是可能的产生terajets在其焦点处使用平面波照明下的3D介电长方体的高分辨率。在这里，使用长方体的terajets的谐波和角响应进行了系统的研究。在基频和两个更高频率谐波处证明了多频聚焦，对于每种情况，示出了类似于10、类似于18和类似于14的强度增强。这种能力，使用3D介电长方体产生terajets在基频和第一谐波的实验评估，在亚太赫兹频率，与数值结果吻合良好。此外，一个强大的角度响应数值和实验表明，在焦点位置的强度保持在一个很宽的角度范围内（从0度到45度），展示了作为一个宽扫描terajet聚焦透镜工作的能力。这里呈现的结果可以在不同的频带（例如光学频率）处缩放，并且可以用于显微技术和传感器。(C)2015年美国光学学会
In the past, it has been demonstrated that it is possible to produce terajets with high resolution at its focus using 3D dielectric cuboids under plane-wave illumination. Here, a systematic study of the harmonic and angular response of terajets using cuboids is performed. Mutifrequency focusing is demonstrated at the fundamental frequency and two higher frequency harmonics showing an intensity enhancement of similar to 10, similar to 18, and similar to 14 for each case. This capability to use 3D dielectric cuboids to produce terajets at the fundamental frequency and first harmonic is experimentally evaluated at sub-THz frequencies, with good agreement with numerical results. Moreover, a robust angular response is demonstrated numerically and experimentally showing that the intensity at the focal position is maintained in a wide angular range (from 0 degrees to 45 degrees), demonstrating the capability to work as a wide scanning terajet-focusing lens. The results here presented may be scaled at different frequency bands such as optical frequencies and may be used in microscopy techniques and sensors. (C) 2015 Optical Society of America