A technique for treating bacterial infections has successfully used light-activated quantum dots (QDs) to kill multiple multidrug-resistant strains. The approach is adaptive to constantly evolving drug-resistant bacteria and avoids damage to surrounding cells, an issue encountered in earlier...Read full articleRelated content from Photonics MediaARTICLESInjected Nanoparticles Could Enable Sight Beyond Visible SpectrumNo mammalian photoreceptor can effectively detect light that exceeds 700 nm, and mammals are unable to see near-infrared (NIR) light or to project a NIR image to the brain. To enable the detection of...BioPhotonics October 2019 IssueNanolaser Proves Fully Functional Within Living TissueResearchers at Northwestern University have created a nanolaser that can be used in living tissues without harming them. Developed in conjunction with a team from Columbia University, the nanolaser...BioPhotonics Nov/Dec 2019 IssueUV-Powered Fluid Pump Could Move Pollutants, Deliver DrugsA highly controllable method that uses UV light to direct particle motion and assembly within liquids could assist in drug delivery and chemical sensing. Developed by the Sen Lab at Pennsylvania...BioPhotonics April 2019 IssueMicroscopic Robots Powered by Light Could Aid Medical DiagnosticsUsing novel nanofabrication techniques, researchers from the University of Pennsylvania and Cornell University have built micro-robots made from silicon and powered by solar cells. One million...BioPhotonics May/Jun 2019 IssuePRODUCTSLight EngineThe ZIVA light engine from Lumencor Inc. features seven individually addressable lasers and advanced electronic control systems. 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The sources feature faster modulation rates because of low time...BioPhotonics September 2018 IssuePHOTONICS HANDBOOK ARTICLESAspheric Lenses: Design Considerations: This first of two articles will cover design and manufacturing options for aspheres; the second will include more detail on manufacturing and testing processes. 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. For example,...Photonics HandbookOptical Delay Lines: Key to Time-Resolved Measurements: To obtain an accurate means of creating reliable delays in any time-resolved spectroscopy or dynamic experiment, several factors about the delay line stage must be considered to reduce or eliminate errors associated with linear stages.One of the most critical elements of any time-resolved spectroscopy and dynamics experiment is the optical delay line. A typical optical delay line consists of a retroreflector or folding mirrors on...Photonics HandbookMicroscopy Illumination: Considering Nonlaser Light Sources: Metal halide and LED light sources are changing the illumination landscape in microscopy. Brighter, easier to use and growing in application, they are driving new options in fluorescence, conventional bright-field and other contrast techniques.As recently as five years ago, shopping for a microscope light source was fairly straightforward. For routine applications, it was tungsten halogen, typically 100 W, while for fluorescence, it was an...Photonics HandbookLight-Emitting Diodes: A Primer: Light-emitting diodes (LEDs) are semiconductors that convert electrical energy into light energy. The color of the emitted light depends on the semiconductor material and composition, with LEDs generally classified into three wavelengths: ultraviolet, visible, and infrared.The wavelength range of commercially available LEDs with single-element output power of at least 5 mW is 360 to 950 nm. Each wavelength range is made from a specific semiconductor material family,...Photonics HandbookWHITEPAPERSMeasuring Illumination Intensity with Accuracy and PrecisionSince LED illumination systems for fluorescence microscopy arrived on the market, what is often known as "illumination intensity" has been a hot topic. The amount of light reaching the sample...Photonics.com 11/6/2019Diode Lasers Enable Diverse Therapeutic ApplicationsDiode lasers have become the dominant laser type used in therapeutic applications. This is because these workhorse devices provide lower cost of ownership, a wider choice of output wavelength and...Photonics.com 10/29/2018White Dwarf and Monaco: A Simple Turnkey Source of <10 fs PulsesThis white paper describes a simple source of ultrashort (<9 femtoseconds) laser pulses: an optical parametric chirped-pulse amplifier (OPCPA) incorporating a high repetition rate ytterbium fiber...Photonics.com 6/13/2018Six Best Practices for Optical Product Design TeamsIn their groundbreaking study Six Myths of Product Development, Stefan Thomke and Donald Reinertsen exposed common fallacies of product development and presented best practices for overcoming them...Photonics.com 5/1/2018WEBINARSBiophotonic Imaging for Medicine: A Digital ConferenceResearchers from around the world presented their latest work at “Biophotonic Imaging for Medicine: A Digital Conference.” Presentations focused on a range of light-based imaging and...Photonics.com 6/11/2015Developments in Optics and Optical ComponentsFree Webinar Additional Questions & Answers from the Webinar below: Speakers: Dr. Robert R. McLeod Associate Professor and Graduate Director Electrical, Computer and Energy...Photonics.com 5/29/2013CLEO 2015 Technology Transfer Preview WebinarThe Technology Transfer Program, part of the annual Conference on Lasers and Electro-Optics, is a chance for researchers to learn about turning their discoveries into marketable products. This...Photonics.com 4/30/2015Quantum Dots Are Making Displays Brighter and Photomedicine BetterIf you are interested in learning how QDs are currently used in displays and how the same materials are being engineered to yield even brighter, more efficient, better colors for future displays,...Photonics.com 4/23/2019PHOTONICS DICTIONARY TERMSquantum dotsAlso known as QDs. Nanocrystals of semiconductor materials that fluoresce when excited by external light sources, primarily in narrow visible and near-infrared regions; they are commonly used as...EDU.photonics.com 6/30/2017comparison lampA reference incandescent light source having a luminous intensity that is used in photometry for comparison of other light sources.EDU.photonics.com 9/8/2009wedge photometerA photometer that uses a wedge, marked to show its reduction of flux density, to make two light sources equal in intensity for comparison of luminous intensities. 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