4 and 8-pixel THz Fourier phase gratings
B Mirzaei (TU Delft - QN/Mol. Electronics & Devices)
J.R.G. Silva (SRON–Netherlands Institute for Space Research)
Y. C. Luo (Student TU Delft)
X. X. Liu (Student TU Delft)
Lei Wei (TU Delft - ImPhys/Optics)
Darren J. Hayton (SRON–Netherlands Institute for Space Research)
Jian Gao (SRON–Netherlands Institute for Space Research, TU Delft - QN/Gao Lab)
C. Groppi (Arizona State University)
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Abstract
Modelling, manufacturing and characterization of two 4 and 8-pixel Fourier phase gratings operated at 1.4 THz are reported, mainly applicable as local oscillator multiplexers for heterodyne receivers. Comparing the measurements with full 3D simulations shows good agreements and provides good understanding. Power efficiency of around 70% is experimentally derived for both gratings. We demonstrate the application of both, as multiple beam local oscillators to simultaneously pump (or operate) an array of 4-pixel superconducting mixers.
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