Modified Soret Lenses for Dual-Band Integrated Detectors at Millimetre and Submillimetre Wavelengths

Abstract

This paper presents a planar silicon integrated subharmonic mixer on top of a photonic-crystal platform. The local oscillator (LO) power is injected through a 2D photoniccrystal (PC) slab to a resonant cavity that effectively couples the signal to a planar bow-tie antenna. The same antenna, which is printed on the top of the PC cavity, contains an antiparallel Schottky diode pair which performs the down-conversion. The proposed design is a simple, easy to integrate, low cost, low profile device. Moreover, the described fabrication process is compatible with active components integration. The performance of the design has been experimentally demonstrated showing good agreement with the simulation and is comparable with the stateof-the-art of planar mixers. The work presented here is based on concepts and technologies from electronics and photonics domains and may be a good starting point for the creation of new devices, allowing the integration and upgrading of existing techniques from both worlds.

Dual-Band and integrated detectors for submillimetre applications

“…The proposed approach can be an alternative for compact integrated detectors, which are of great relevance to obtain in a single measurement information of different spectral ranges, reducing instrument cost, size, weight, and power consumption. Some of the work presented in this chapter has been published in [Tor19].…”