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We demonstrate a THz optical delivery system capable of supplying a low divergence HE11 Gaussian beam at a distance of >500mm from the facet of a THz quantum cascade laser. This is achieved by optimising the optical coupling to an external hollow flexible polystyrene-lined Ag waveguide, by utilising a monolithically integrated cylindrical metal waveguide in the laser mounting block. This is shown...
We present a quantum cascade laser emitting around 2.9 THz, based on a new hybrid plasmonic waveguide design. The resultant optical mode provides a performance commensurate with a metal-metal waveguide, while improving the far-field pattern.
We have realized a compact beam-shaping and collimating element for a double metal terahertz (THz) quantum cascade laser (QCL) emitting around 2.9 THz using directly integrated hollow metallic waveguides. Our approach allowed us to efficiently improve the beam profile with respect to the standard emission pattern observed out of a double metal QCL. The Gaussian-like mode profile emerging from the...
Pulsed X-rays were used to perform Single-Event Transient (SET) measurements on a COTS DC/DC PWM controller. The results were consistent with those of the previous heavy ion and pulsed laser testings, which indicates that the pulsed X-ray technique is a complementary tool to investigate SET. However, there are some limitations, such as low energy absorption of X-rays in silicon and total ionizing...
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