A practical guide to Terahertz imaging using thermal atomic vapour

Abstract

This tutorial aims to provide details on the underlying principles and methodologies of atom-based terahertz imaging techniques. Terahertz imaging is a growing field of research which can provide complementary information to techniques using other regions of the electromagnetic spectrum. Unlike infrared, visible and ultraviolet radiation, terahertz passes through many everyday materials, such as plastics, cloth and card. Compared with images formed using lower frequencies, terahertz images have superior spatial resolution due to the shorter wavelength, while compared to x-rays and gamma rays, terahertz radiation is non-ionising and safe to use. The tutorial begins with the basic principles of terahertz to optical conversion in alkali atoms before discussing how to construct a model to predict the fluorescent spectra of the atoms, on which the imaging method depends. We discuss the practical aspects of constructing an imaging system, including the subsystem specifications. We then review the typical characteristics of the imaging system including spatial resolution, sensitivity andbandwidth. We conclude with a brief discussion of some potential applications

arXiv commentInvited Review. 37 pages

References in corpus (32)

• Quantum sensing
• Optical Magnetometry
• Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency
• Nuclear spin gyroscope based on an atomic co-magnetometer
• Quantum superhet based on microwave-dressed Rydberg atoms
• ARC: An open-source library for calculating properties of alkali Rydberg atoms
• Broadband Rydberg Atom-Based Electric-Field Probe: From Self-Calibrated Measurements to Sub-Wavelength Imaging
• Rydberg atom quantum technologies
• Real-Time Near-Field Terahertz Imaging with Atomic Optical Fluorescence
• Objectively discerning Autler-Townes Splitting from Electromagnetically Induced Transparency
• Modulation transfer spectroscopy in atomic rubidium
• ElecSus: A program to calculate the electric susceptibility of an atomic ensemble
• Ultra-high-speed Terahertz Imaging Using Atomic Vapour
• Vapor-cell-based atomic electrometry for detection frequencies below kHz
• Microwave dressing of Rydberg dark states
• Laser frequency stabilization to highly excited state transitions using electromagnetically induced transparency in a cascade system
• Three-photon electromagnetically induced transparency using Rydberg states
• Grating chips for quantum technologies
• A compact differential gravimeter at the quantum projection noise limit
• Simple microwave field imaging technique using hot atomic vapor cells
• Polarization spectroscopy of an excited state transition
• Widefield Microwave Imaging in Alkali Vapor Cells with sub-100 um Resolution
• Laser cooling in a chip-scale platform
• An all-optical intrinsic atomic gradiometer with sub-20 fT/cm/$\sqrt{\mathrm{Hz}}$ sensitivity in a 22 $\mu$T earth-scale magnetic field
• Triple stack glass-to-glass anodic bonding for optogalvanic spectroscopy cells with electrical feedthroughs
• Microcontroller based scanning transfer cavity lock for long-term laser frequency stabilization
• Single-photon cesium Rydberg excitation spectroscopy using 318.6-nm UV laser and room-temperature vapor cell
• Dressed-state electromagnetically induced transparency for light storage in uniform phase spin-waves
• Better magneto-optical filters with cascaded vapor cells in the Faraday-Faraday and Faraday-Voigt geometries
• Low-drift Zeeman shifted atomic frequency reference
• Rapid readout of terahertz orbital angular momentum beams using atom-based imaging
• Single Molecule DNA Detection with an Atomic Vapor Notch Filter

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