Researchers at the University of California, Riverside (UC Riverside) and the University of Texas at Austin demonstrated the use of nontoxic silicon nanocrystals to convert low-energy photons into high-energy ones. The use of nontoxic materials for photon upconversion could help advance the development of photodynamic treatments for cancer. Ultraviolet (UV) light can form free radicals that can attack cancer tissue. However, it does not travel deep enough into tissues to generate therapeutic radicals close to the cancer site. 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As little as 0.06% of the light that hits the ultrablack butterfly...Photonics Spectra May 2020 IssueElectric field-induced Charging Could Improve Colloidal Quantum Dot LasingResearchers at Nanyang Technological University (NTU Singapore) have demonstrated tunable, controllable amplified spontaneous emission (ASE) in a colloidal semiconductor device via electric...Photonics Spectra February 2020 IssueMaterials Integrated with Silicon Photonics Manipulate Light Phase at Low LossA Columbia University team used a 2D material from the transition metal dichalcogenide (TMD) class to control the phase of light without changing its amplitude or depleting its power. By placing the...Photonics Spectra May 2020 IssuePRODUCTSLight EngineThe ZIVA light engine from Lumencor Inc. features seven individually addressable lasers and advanced electronic control systems. 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These articles will provide the tools optics designers need to tailor their designs to the appropriate manufacturing process and to optimize the cost of component fabrication.Aspheric surfaces are powerful tools that combine the optical corrections of multiple lenses into a single element (Figure 1) and affect performance in ways that spherical optics cannot. 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Toussaint Jr. Quantitative...Photonics.com 3/21/2013PHOTONICS DICTIONARY TERMSrefractive index contrastA measure of the relative difference in refractive index between two optical materials. Most commonly used in fiber optics where the refractive index contrast, D, is given as follows: where n1 equals...EDU.photonics.com 3/5/2018linear plasticA term for thermoplastic optical materials; that is, those in which the polymer chains remain linear after heating and molding and which thus can be remolded again and again, unlike thermoset...EDU.photonics.com 9/8/2009photonicsThe technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and...EDU.photonics.com 3/22/2016radiation trappingThat process by which radiation spontaneously emitted by a volume of optical materials is resonantly reabsorbed within the same volume before it escapes. 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For the...Photonics.com 7/2/2018PHOTONICS BUYERS' GUIDE CATEGORIESElectro-Optic CrystalsOptical GlassUltraviolet Transmitting FiltersMagneto-Optic GlassCOMPANIESOhara 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' GuideGlass Fab Inc.A History of Quality Since 1974 Glass Fab Inc. has met customers' stringent specifications by providing fabricated parts made of optical glass, filter glass, fused quartz and fused silica, low...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' GuideLaCroix Precision OpticsOptics that Defend, Build, Cure and Discover The LaCroix name is synonymous with quality precision optics. Since 1947, three generations of family leadership have placed LaCroix Precision Optics...Photonics Buyers' Guide