Definition of terahertz spectrometer

Photonics Dictionary

terahertz spectrometer: A terahertz spectrometer is a scientific instrument used to measure and analyze the properties of materials in the terahertz frequency range, typically spanning from about 0.1 to 10 terahertz (THz), which corresponds to wavelengths ranging from about 30 micrometers to 3 millimeters. Terahertz radiation lies between the microwave and infrared regions of the electromagnetic spectrum.

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Terahertz spectrometers operate by generating and detecting terahertz waves, which can interact with matter in unique ways, providing valuable information about the material's composition, structure, and physical properties. Terahertz spectroscopy is particularly useful for studying materials that exhibit specific responses to terahertz radiation, such as polymers, semiconductors, pharmaceuticals, biological tissues, and explosives.

A terahertz spectrometer typically consists of several key components:

Terahertz source: This component generates terahertz radiation, often using methods such as photoconductive switches, frequency multiplication, or terahertz quantum cascade lasers.

Optics: Lenses, mirrors, and other optical components are used to focus, collimate, and manipulate the terahertz radiation as it interacts with the sample.

Sample chamber: The sample under investigation is placed in a controlled environment within the spectrometer, allowing for precise measurements under various conditions, such as temperature and pressure.

Detector: Specialized detectors, such as terahertz-sensitive photodiodes or bolometers, are used to measure the intensity of terahertz radiation after it has interacted with the sample.

Data analysis software: Sophisticated software is employed to analyze the terahertz spectra obtained from the measurements, extracting valuable information about the sample's properties.

Terahertz spectrometers find applications in various fields, including materials science, pharmaceuticals, biology, security screening, and nondestructive testing, due to their ability to provide valuable insights into the molecular and structural characteristics of diverse materials.

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Terahertz Spectrometers

Opto Diode Corp. - Detector Spotlight 10-24 MR