Real‐Time THz Beam Profiling and Monitoring via Flexible Vertically Aligned Carbon Nanotube Arrays. Issue 21 (15th August 2022)

• Record Type: Journal Article
• Authors: Xiao, Dongyang; Wang, Qian; Wang, Zhaosong; Zhang, Yili; Wu, Jingbo; Fan, Kebin; Sun, Leimeng; Zhu, Minmin; Ng, Zhi Kai; Teo, Edwin Hang Tong; Hu, Fangjing
• Is Part Of: Advanced optical materials. Volume 10:Issue 21(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-15
• Subjects: carbon nanotubes -- flexible absorbers -- quasi‐optical systems -- real‐time imaging -- terahertz; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202201363
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: In terahertz (THz) quasi‐optical systems, the real‐time profiling and visualization of THz beams is of great importance for beam focusing and collimation applications. Herein, a cost‐effective and room‐temperature‐operated THz imaging device for this purpose is demonstrated experimentally using a flexible and broadband THz absorber based on a vertically aligned carbon nanotube (VACNT) array. Excellent THz absorption performances with an average power absorptance >96.8% are achieved within 0.1 and 2.5 THz. The energy of the incident THz wave is absorbed by the THz absorber and converted into heat that will re‐radiate and can be detected by an infrared (IR) camera as a result of the THz‐to‐IR conversion mechanism. Real‐time THz beam imaging and monitoring applications are demonstrated by a series of experiments at both 0.1 and 0.3 THz, providing an alternative approach for real‐time beam profiling and monitoring of THz waves. Abstract : The THz beam profiling and visualization is demonstrated experimentally via a cost‐effective and room‐temperature‐operated THz absorber based on the vertically aligned carbon nanotube array. Real‐time THz beam profiling and monitoring experiments are demonstrated at 0.1 THz and 0.3 THz utilizing the THz‐to‐IR conversion mechanism, providing an alternative approach for THz wave imaging using the mature IR techniques.