A Broadband Silicon-Integrated Chopper for Passive Terahertz Cameras

Hoogelander, M.; Llombart, Nuria; Spirito, M.; Alonso Del Pino, M.

A Broadband Silicon-Integrated Chopper for Passive Terahertz Cameras

Conference paper (2024)

Authors

M. Hoogelander Tera-Hertz Sensing -

Nuria Llombart Tera-Hertz Sensing -

M. Spirito Electronics -

M. Alonso Del Pino Tera-Hertz Sensing -

Research Group

Tera-Hertz Sensing () (TU Delft)

Terahertz Passive imaging SiGe Chopping Modulator Reconfigurable surface

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Published Date

2024

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

In this contribution, we describe a reconfigurable surface, designed in 130um SiGe technology, to realize a fully-electronic, planar chopper aiming at passive terahertz imaging applications. This surface consists of subwavelength metallic patches that are interconnected using FET-based varactors. By switching the bias voltage of the varactors between 0V and 1.2V, the reconfigurable surface can switch between a transmissive and opaque state, respectively. The expected transmissivity is simulated to be between 0.2 and 0.9 over a wide frequency band, from 250 GHz to 550 GHz. This chopping solution would enable a high degree of system integration for future passive terahertz cameras.