A new low-frequency terahertz source shows promise as a simpler, less expensive option for terahertz applications.KAZUUE FUJITA AND KAZUKI HORITA, HAMAMATSU PHOTONICS, AND STEPHANIE BUTRON, HAMAMATSU CORP.The terahertz (THz) spectral range between the infrared and microwave has long been recognized as an unexploited range of frequency bands. It has considerable potential for application in numerous fields, including communications, imaging, spectroscopy, and biological engineering since the THz wave can pass through nonconducting materials such as many dielectric materials, semiconductors, and medicines. Unlike x-ray radiation with its ionizing properties, THz radiation is nonionizing and nondestructive with low photon energies, making it safer for humans. However, widespread commercialization...Read full articleRelated content from Photonics MediaARTICLESTerahertz Technology Is Heating UpResearchers at ETH Zurich have reported the highest operating temperature of a quantum cascade laser, which eliminates a major barrier in the practical implementation of the technology. While...Photonics.com 8/2/2019Laser Direct IR Imaging Projects Microplastics AnalysisContamination of soil, air, and drinking water by microplastics is a growing focus of attention around the world. Environmental agencies are increasing the monitoring of waterways, and governmental...BioPhotonics Sep/Oct 2020 IssueInfrared Sensors Offer Insights into Invisible ThreatsMark Zondlo has an atmospheric chemistry laboratory at Princeton University, but you may have a hard time finding him there. 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Semiconductor lasers first made their appearance in 1962 when Robert...Photonics HandbookLasers: Understanding the Basics: Although lasers range from quantum-dot to football-field size and utilize materials from free electrons to solids, the underlying operating principles are always the same. This article provides the basic information about how and why lasers work.Almost 60 years have passed since the first demonstration of a laser in 1960. After the initial spark of interest, lasers were for a while categorized as “a solution waiting for a...Photonics HandbookNd:YAG Lasers: Standing the Test of Time: The Nd:YAG laser crystal was developed not long after the discovery of the ruby laser in the 1960s. Of all the solid-state laser crystals, it has stood the test of time best. Its high gain, narrow linewidth, low threshold and physical properties make it a most versatile laser material for a variety of applications.The ubiquitous Nd:YAG laser has played many roles over the years. 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This paper gives you an overview about several methods of camera-based observation to find the best solution...Photonics.com 7/1/2020WEBINARSThe Future of Lasers: Two PerspectivesThe Future of Lasers: Two Perspectives brings together two expert viewpoints on the future of quantum cascade lasers, fiber lasers and next-generation solid-state lasers. Our Expert Panel: ...Photonics.com 6/21/2011New Directions in Microscopy IlluminationBelow is Michael Walsh's presentation - Join us for a FREE webinar: Wednesday, Aug. 13, 2014, 1 p.m. EDT New Directions in Microscopy Illumination In optical microscopy, light is...Photonics.com 8/13/2014Laser Transmitters for Fiber Optic CommunicationsFREE WEBINAR Dr. Hamid Hemmati Supervisor, Optical Communications Group Jet Propulsion Laboratory California Institute of Technology In this talk, Dr. Hemmati will cover...Photonics.com 3/28/2013Raman Spectroscopy for Research and IndustryFREE WEBINAR Additional Questions and Answers from the Webinar are below: Speakers to include: David J. Brady, Duke University Computational and Compressive Raman Spectroscopy ...Photonics.com 6/24/2013PHOTONICS DICTIONARY TERMSquantum cascade laserA Quantum Cascade Laser (QCL) is a type of semiconductor laser that emits light in the mid- to far-infrared portion of the electromagnetic spectrum. Quantum cascade lasers offer many benefits: They...EDU.photonics.com 6/25/2019terahertz radiationElectromagnetic radiation with frequencies between 300 GHz and 10 THz, and existing between regions of the electromagnetic spectrum that are typically classified as the far-infrared and microwave...EDU.photonics.com 9/8/2009terahertz (THz)A unit of frequency that equals 1012 cps.EDU.photonics.com 9/8/2009backlightingThe forming of a clear silhouette of an object by placing a light source behind it. Used in machine vision when surface features of an object are not important.EDU.photonics.com 9/8/2009MEDIACapasso Group's Optical Harmonic Combs Could Operate as THz SourceResearchers at Harvard's John A. 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Dr. Englund's group, the Quantum Photonics Group, is made up of postdocs and...Photonics.com 3/29/2018UniKLasers Lab Virtual TourPhotonics.com 1/18/2021PHOTONICS BUYERS' GUIDE CATEGORIESQuantum Cascade LasersFrequency CombsTerahertz LasersOptical RadarsCOMPANIESHamamatsu CorporationHamamatsu Corporation is the North American subsidiary of Hamamatsu Photonics K.K. (Japan), a leading manufacturer of devices for the generation and measurement of infrared, visible, and ultraviolet...Photonics Buyers' GuideFOCtek Photonics Inc.FOCtek provides customers with all types of custom manufactured lenses, Precision Optical Components, Polarizing Optics, Prisms, Filters, Coatings, Optical Systems, Crystals, Nonlinear Crystals,...Photonics Buyers' GuideOhara Corporation, Western OfficeOhara manufactures precision optical glasses: strip/slab, cut/molded blanks, pressings, high homogeneity blanks, fine gobs, polished ball lenses, near-UV transmitting i-Line glass, ceramic...Photonics Buyers' GuideOZ Optics LimitedEstablished in 1985, OZ Optics is a leading worldwide supplier of fiber optic components, test equipment and sensors. OZ Optics manufactures its products in three locations, Ottawa (Canada),...Photonics Buyers' Guide