High-performance photonic crystal fiber (PCF) has an important impact on the development of full potential complex terahertz systems. A new kind PCF with D-shaped air holes in core region was proposed for (THz) region. The numerical simulation results showed that a flat dispersion 0.09 ± 0.28 ps/THz/cm at 0.8-1.2 THz. At 1 THz, ultra-high birefringence 0.0595, low effective material loss (EML) ...

We present a ground breaking Terahertz Time-Domain spectrometer (THz-TDS) and illustrate its performance by the non-destructive evaluation of fibre reinforced plastics and adhesively joined assemblies. Operated as imaging device this technology gives in a direct way access to the inner structure of dielectric materials and reveals manufacturing defects or fatigue damage in short acquisition tim...

Applications of terahertz technology include detection of biological and chemical hazardous agents, explosive detection, applications in building and airport security, radio astronomy and space research, and in biology and medicine, for example, in cancer diagnostics. These applications have stimulated a lot of interest in terahertz electronics technologies that have potential to replace or aug...

Terahertz (THz) radiation was proposed recently for use in various applications, including medical imaging and security scanners. However, there are concerns regarding the possible biological effects of non-ionising electromagnetic radiation in the THz range on cells. Human embryonic stem cells (hESCs) are extremely sensitive to environmental stimuli, and we therefore utilised this cell model t...

Metamaterials open up various exotic means to control electromagnetic waves and among them polarization manipulations with metamaterials have attracted intense attention. As of today, static responses of resonators in metamaterials lead to a narrow-band and single-function operation. Extension of the working frequency relies on multilayer metamaterials or different unit cells, which hinder the ...

Ultrafast terahertz spectroscopy can be used to probe charge and spin dynamics in semiconductors. We have studied THz emission from bulk InAs and GaAs and from GaAs/AlGaAs quantum wells as a function of magnetic field. Ultrashort pulses of THz radiation were produced at semiconductor surfaces by photoexcitation with a femtosecond TiSapphire laser, and we recorded the THz emission spectrum and t...

The vision of 6G communications is an improved performance the data rate and latency limitations permit ubiquitous connectivity. In addition, will adopt a novel strategy. Terahertz (THz) waves characterize networks, due to integrate terrestrial wireless mobile communication, geostationary medium low orbit satellite communication short distance direct technologies, as well computing, navigation....

Imaging and spec troscopy at terahertz fre quencies have great po tential for healthcare, plasma di ag nos tics, and homeland secu rity ap pli ca tions. Terahertz fre quen cies cor re spond to en ergy level tran si tions of im por tant mol e cules in bi ol ogy and as trophys ics. Terahertz ra di a tion (T-rays) can pen e trate cloth ing and, to some ex tent, can also pen e trate bi o log i cal ...

Terahertz (THz) electromagnetic wave has been widely used as a spectroscopic probe to detect the collective vibrational mode in vast molecular systems and investigate dielectric properties of various materials. Recent technological advances in generating intense THz radiation and the emergence of THz plasmonics operating with nanoscale structures have opened up new pathways toward THz applicati...

We demonstrate a terahertz (THz) beam steering method using difference frequency generation that is based on the principle of phased array antennas. A strip-line photoconductive antenna was illuminated by two spatially dispersed beams produced from an ultrafast laser. THz radiation with a bandwidth of 65 GHz was generated from the overlapping area of the two beams, between which the frequency d...