The demand for communication services has led to the exploration of higher frequency bands, including the D-band (110 GHz to 170 GHz) for wireless backhaul/access networks. However, electromagnetic waves at this frequency experience significant path loss in free space, making it necessary to improve antenna efficiency. An ideal antenna for high frequencies should have low loss, high...
Jitter-free THz for ultrafast electron microscopy
A. Zimmermann1, J. Kuttruff1, M. V. Tsarev1, P. Baum1
1 Department of Physics, Universtiy of Konstanz, Universitätsstr. 10, 78464 Konstanz, Germany
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Electron pulses of short duration play a pivotal role in time-resolved atomic-scale diffraction and electron microscopy. We utilize a...
Spintronic terahertz emitters (STEs) offer ultra-broadband terahertz sources that are easy to scale at low cost [1]. Our recently developed fiber-tip STEs allow terahertz systems to become fully fiber-coupled, narrowing the gap for STEs to be used in integrated photonic devices and industrial applications [2, 3]. Here, we present a proof-of-concept for non-destructive layer thickness...
Terahertz (THz) radiation finds extensive applications in a wide range of fields [1-4]. Recently, there has been a growing interest in high repetition rate, high peak power THz radiation sources due to their ability to observe temporary phenomena in materials [1], enable real-time THz spectroscopic imaging of molecules [2], and serve as sources for electronic/ion emission (Scanning Tunneling...
For the detection of THz usually electro-optic sampling (EOS) using a pump-probe scheme is utilized [1]. With
this, a multi-shot approach, multi-shot EOS (MEOS), is used by which the timing between the THz pump and
probe is modified to measure the temporal change in the refractive index of the material, which is proportional to
the THz amplitude [2]. This approach has some disadvantages....
Terahertz (THz) radiation emission from laser plasma, achieved by focusing two-color femtosecond pulses in air or gas, is widely utilized for its broad spectrum and relatively high peak intensity. Optimizing the THz yield from two-colour plasma is crucial to approach the signal levels attained in crystals. The pulse chirp plays a significant role in controlling the THz-optical conversion...
This research explores the potential of integrating a THz source into an X-ray free-electron laser facility. We present a study that characterises and comprehends THz undulator radiation in the presence of a waveguide (the vacuum pipe). By building on previous work, we have developed a code for calculating synchrotron radiation in the presence of boundary conditions. Our approach utilises the...
