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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

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Spiral Antenna-Coupled Microbridge Structures for THz Application.

Jun Gou¹, Tian Zhang², Jun Wang³

¹State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Nanoscale Research Letters

|February 8, 2017

Summary

This summary is machine-generated.

This study presents novel antenna-coupled microbolometer structures for terahertz (THz) imaging. Optimized spiral antennas achieve over 75% THz absorption, enhancing detector performance for real-time imaging applications.

Keywords:

Absorption Design Microbolometer Spiral antenna THz

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Area of Science:

Terahertz (THz) technology
Microbolometer sensor development
Electromagnetic wave absorption

Background:

Bolometer sensors offer compact, cost-effective, and wideband solutions for THz imaging.
Infrared microbolometer structures serve as a basis for novel THz detector designs.

Purpose of the Study:

To propose and simulate antenna-coupled microbridge structures for enhanced THz wave absorption.
To optimize absorption at 2.52 THz, a key frequency for CO2 lasers, for detection and imaging applications.

Main Methods:

Design and simulation of two microbridge structures with different spiral antennas: on a support layer and with extended legs.
Analysis of the impact of spiral antenna parameters (rotation angle, line width, spacing) on THz absorption.
Optimization of structure parameters to maximize absorption rate at 2.52 THz.

Main Results:

A spiral antenna with extended legs demonstrates high absorption at low frequencies and dual functionality as an electrode lead.
An optimized spiral antenna-coupled microbridge structure achieved an absorption rate exceeding 75% at 2.52 THz.
Demonstrated tunability of THz absorption through spiral antenna design variations.

Conclusions:

Spiral antennas, particularly those with extended legs, are effective for enhancing and tuning THz absorption in microbolometer structures.
The developed structures provide a viable fabrication pathway for advanced THz microbolometer detectors.
These detectors hold significant potential for real-time THz imaging applications.