Terahertz Imaging Applications
Terahertz Imaging Applications - Related Videos
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Cited by 9 •
2013
We describe methods for the design, fabrication, and experimental characterization of plasmonic photoconductive emitters, which offer two orders of magnitude higher terahertz power levels compared to conventional photoconductive emitters.
07:28
Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Cited by 3 •
2012
The procedure for implementing a refractive index sensor for terahertz frequencies based on a grooved parallel-plate waveguide geometry is described here. The method yields a measurement of the refractive index of a small volume of liquid through monitoring of the shift in the resonant frequency of the waveguide...
10:28
Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
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Cited by 1 •
2017
A protocol for the design and fabrication of a novel nanopillar-based split ring resonator (SRR) is presented.
08:56
Terahertz Imaging and Characterization Protocol for Freshly Excised Breast Cancer Tumors
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Cited by 18 •
2020
Freshly excised human breast cancer tumors are characterized with terahertz spectroscopy and imaging following fresh tissue handling protocols. Tissue positioning is taken into consideration to enable effective characterization while providing analysis in a timely manner for future intraoperative applications.
10:53
A Novel Application of Musculoskeletal Ultrasound Imaging
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Cited by 14 •
2013
We describe a new ultrasound-based vector tissue Doppler imaging technique to measure muscle contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities. This approach provides complementary measurements of dynamic muscle function and could lead to a better understanding of mechanisms underlying musculoskeletal disorders.
FAQs
Chemical and structural contrast arises when different regions alter terahertz absorption, reflection, or transmission in distinct ways. Those signal changes are mapped spatially, allowing an image to show composition, internal structure, or defects across a heterogeneous sample. Because the contrast depends partly on dielectric properties, materials with similar visible appearance can still produce different terahertz responses.
Terahertz pulses interact with molecular rotations, intermolecular vibrations, and material dielectric properties. These interactions change how a sample absorbs, reflects, or transmits the radiation, creating measurable signatures associated with its chemical and structural state. The resulting information can support chemical identification and help distinguish different solid forms, including polymorphs with differing crystal structures.
Terahertz methods provide a non-destructive, non-ionizing measurement that combines spatial imaging with spectroscopic information. This combination can reveal composition, defects, or concealed features that may not be represented by visual appearance alone. Used with optical, infrared, or X-ray techniques, terahertz imaging complements rather than replaces those approaches in chemical research and industrial analysis.
A basic workflow measures how terahertz pulses interact with a sample and records the resulting absorption, reflection, or transmission. The measured signals are then associated with spatial positions to create an image, while their spectral behavior provides additional chemical information. Interpreting both dimensions helps locate heterogeneous regions, identify material differences, and examine defects without destroying the sample.
They are useful when pharmaceutical quality control requires information about composition, solid form, or spatial uniformity without damaging the sample. Terahertz measurements can support chemical identification and polymorph analysis, while imaging shows where relevant differences occur. This combination is valuable for examining heterogeneous pharmaceutical materials and assessing whether their chemical or structural features are consistent.
Differences in material composition and dielectric properties can change terahertz absorption, reflection, or transmission at particular locations. Mapping those changes can expose hidden layers or indicate regions containing contaminants, even when the surface does not reveal them visually. The approach therefore supports non-destructive inspection of layered or heterogeneous materials in both chemical research and industrial settings.