Bernd M. Fischer

Tanya M Monro1
Alexander Argyros1
Shaghik Atakaramians1
1Tanya M Monro
1Alexander Argyros
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We propose a novel class of optical fiber with a porous transverse cross-section that is created by arranging sub-wavelength air-holes within the core of the fiber. These fibers can offer a combination of low transmission loss and high mode confinement in the THz regime by exploiting the enhancement of the guided mode field that occurs within these(More)
Using conventional materials, the resolution of focusing and imaging devices is limited by diffraction to about half the wavelength of light, as high spatial frequencies do not propagate in isotropic materials. Wire array metamaterials, because of their extreme anisotropy, can beat this limit; however, focusing with these has only been demonstrated up to(More)
The paper examines several types of anomalously dispersive media that support the argument for superluminal propagation which is the propagation of electromagnetic waves at group velocities exceeding the speed of light. ABSTRACT | This paper reviews earlier studies on superluminal wave propagation in anomalously dispersive media that have been carried out(More)
The thickness of a sample material for a transmission-mode terahertz time-domain spectroscopy (THz-TDS) measurement is the subject of interest in this paper. A sample that is too thick or too thin can raise the problem of measurement uncertainty. Although greater thickness allows the terahertz radiation--or T-rays--to interact more with bulk material, the(More)
— One source of disturbance in a pulsed Tray signal is attributed to ambient water vapor. Water molecules in the gas phase selectively absorb Trays at discrete frequencies corresponding to their molecular rotational transitions. This results in prominent resonances spread over the Tray spectrum, and in the time domain the Tray signal is observed as(More)
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