A Light-Emitting Diode-Based Strong-Field Terahertz Camera

被引：0
|
作者：
Li S. [1 ,2 ]
Ouyang C. [1 ,2 ]
Ma J. [1 ]
Zhang B. [1 ,2 ]
Wu X. [3 ]
Xu J. [4 ]
Li Y. [1 ,2 ,5 ]
机构：
[1] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing
[2] School of Physical Sciences, Chinese Academy of Sciences, Beijing
[3] School of Electronic and Information Engineering, Beihang University, Beijing
[4] Beijing Office, Texas Instruments Inc., Beijing
[5] Songshan Lake Materials Laboratory, Dongguan
来源：
Guangxue Xuebao/Acta Optica Sinica | 2021年 / 41卷 / 24期
关键词：
Imaging systems; Light emitting diode; Strong-pulsed-field terahertz; Terahertz imaging; Tilted pulse front;
D O I：
10.3788/AOS202141.2411002
中图分类号：
学科分类号：
摘要：
A strong-pulsed-field terahertz camera based on light emitting diode (LED) is reported in this paper. It is based on the operational principle that LED can generate nanosecond pulse-duration photovoltaic signal with a reproducible response to picosecond pulse-duration intense terahertz irradiation due to impact ionization when terahertz electric field strength is larger than 50 kV/cm. By employing this effect, we fabricate scanning and array LED-terahertz cameras. These devices have successfully captured images of focused terahertz beam profile generated in lithium niobate via the tilted pulse front technique. The proposed camera has characteristics of low cost, strong photovoltaic signal, rapid response, and large imaging area. Meanwhile, it would give a new idea in developing terahertz imaging technology based on strong-field nonlinear effect. © 2021, Chinese Lasers Press. All right reserved.
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