Dual-Terahertz-Comb Spectrometer on CMOS for Rapid, Wide-Range Gas Detection With Absolute Specificity

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Affiliation of Author(s):Massachusetts Institute of Technology (MIT)

Journal:IEEE Journal of Solid-State Circuits (JSSC)

Place of Publication:USA

Key Words:CMOS, frequency-comb, maximum power gain, molecular spectroscopy, slot line, terahertz (THz)

Abstract:This paper describes the design and implementation of a 220-320 GHz spectrometer consisting of a pair of 65-nm CMOS chips. The spectrometer utilizes two counterpropagating frequency-comb signals to seamlessly scan the broadband spectrum and significantly reduces the total scanning time through high parallelism. The comb signal, with ten equally spaced frequency tones, is generated and detected by a chain of inter-locked transceivers on chip. The large reduction of required tuning range for each transceiver enables peak energy efficiency across a wide bandwidth.

Note:Firstly published on ISSCC 2017: https://ieeexplore.ieee.org/document/7870381
Later invited to JSSC: https://ieeexplore.ieee.org/document/8068932

First Author:Cheng Wang

Indexed by:Journal

Correspondence Author:Ruonan Han

Document Code:10.1109/JSSC.2017.2755693

Discipline:Engineering

First-Level Discipline:Computer science and technology

Volume:52

Issue:12

Page Number:3361-3372

Translation or Not:no

Date of Publication:2017-12-01

Date of Publication:2017-12-01