Quantum dots (QDs) are an efficient interface between matter and light and could potentially form the basis of quantum communications. However, their signal can be obstructed by structures that form by default during their manufacture. Researchers at the University of Basel, Ruhr-Universität Bochum, and Forschungszentrum Jülich have found a way to eliminate these interfering structures. The Bochum team at the Chair for Applied Solid State Physics realizes quantum dots in semiconductors. Courtesy of RUB, Kramer. The QDs manufactured in Bochum are generated in the...Read full articleRelated content from Photonics MediaARTICLESSpin Lasers Could Transfer Data Faster, Use Less Energy than Conventional LasersCurrently, rapid data transfer via optical fiber is accomplished by transmitting light signals that code data by modulating the light intensity. Due to physical limitations, data transfer that is...Photonics Spectra June 2019 IssueRUB Scientists Show Radiative Auger Process in Quantum DotsScientists at Ruhr-University Bochum, working with researchers based in Basel and Copenhagen, have demonstrated the connection between the radiative Auger process and quantum optics. The scientists...EuroPhotonics Autumn 2020 IssueMachine Learning Helps Tune, Characterize Quantum Dots QuicklyUsing a machine-learning approach, scientists from the Universities of Oxford, Basel, and Lancaster are automating the process of characterizing and tuning individual semiconductor quantum dots (QDs)...Photonics.com 9/27/2019Copper-Based Material Could Lead to Inexpensive, High-Yield OLEDsAt the Paul Scherrer Institute (PSI), researchers have discovered a green luminescent substance that could enable OLEDs to deliver high light yields inexpensively and on a large scale. Many of...Photonics Spectra July 2020 IssuePRODUCTSUltrastable LaserThe ORS-Cubic Ultrastable Laser from Menlo Systems GmbH is a compact device based on the rigidly mounted 5-cm cubic cavity developed in cooperation with the National Physical Laboratory with low...EuroPhotonics Summer 2019 IssueMetal-Coated FibersMetal-Coated Specialty Fibers from heracle GmbH are designed for custom applications with gold or aluminum jackets. The product range includes step index fiber for operation in the UV, VIS, or...Photonics.com 12/11/2019SWIR CameraThe HiPe SenS 640V-ST SWIR Camera from New Imaging Technologies SA features the NSC1902T-SI sensor with low-noise operation and ultra-low dark current. The camera is dedicated to low-light...BioPhotonics Sep/Oct 2020 IssueLidarThe Cube Range lidar from Blickfeld GmbH is a microelectromechanical (MEMS) device that detects obstacles at a distance of up to 250 m. The Cube Range was designed as a robust 3D solid-state...Photonics Spectra December 2019 IssuePHOTONICS HANDBOOK ARTICLESLaser Safety: Important Considerations: Laser safety is nothing to scoff at; lasers can be hazardous. Enter Class 1 laser products — lasers that are so safe that the user doesn’t require specific laser safety training or protective eyewear. Some precautions still exist, though.When purchasing an industrial laser system, the astute buyer will look for a Class 1 laser product — a system where the laser beam hazard is completely enclosed and there is no potential laser...Photonics HandbookPhotomultipliers: Low-Light, High-Speed Specialists: Rapid detection of light calls for a sensitive detector and electronics that do not introduce additional signal noise. In fact, for very rapid detection, detector shot noise does not determine the signal-to-noise ratio. Instead, the amplifier has the most impact, which is why many designers have selected a photomultiplier tube for the high-speed or low-light-level detection of photons.The applications where rapid detection of light is a must are many. They include a wide variety: semiconductor inspection, gene sequencing, oil well logging and high-energy physics. The reasons for...Photonics HandbookVibration Control: Limiting Mechanical Noise: Vibration control plays a critical role in research and industry. Mechanical noise, for example, can obscure high-resolution images and affect the quality of nanotechnology processes. Fortunately, vibration can be controlled through proper experimentation, process design, and the use of specialized equipment.In general, there are three common approaches to reducing mechanical excitation of photonic systems. The first is identifying the sources of vibration and implementing ways to eliminate or reduce...Photonics HandbookIndustrial Lasers: An Introduction to Process Qualification: The step from successfully demonstrating a new laser process on a limited number of samples under laboratory conditions, to scaling that process up for high-volume industrial use is a big one. In particular, it’s necessary to determine how variations in process parameters affect end results, so that acceptable process input and operating ranges can be determined.Materials processing with lasers is actually a broad term for a diverse range of applications. The major categories of these uses, and the lasers that service them, are summarized Table 1. At one...Photonics HandbookWHITEPAPERSDiode 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 10/29/2018Photophysical Characterisation of Perovskite Quantum DotsPerovskite Quantum Dots are a promising new class of light emitters. In this paper a complete photophysical characterisation, comprising of absorption spectra, photoluminescence spectra,...Photonics.com 1/1/2019Kinetics of Photocatalysis Reactions Studied by Transient Absorption SpectroscopyPhotocatalysis is the rate increase of a chemical reaction by light, often in the presence of a catalyst that starts the reaction upon irradiation. Photocatalysts are typically semiconducting metal...Photonics.com 11/1/2019Multi-line Lasers Simplify Biomedical ImagingThe introduction of multi-line lasers to fluorescence instrumentation provides a compact, easy-to-use, and service-free solution for integrating up to four laser wavelengths with reliable, stable...Photonics.com 11/13/2019WEBINARSFrom Product to Profit: The Powerful Impact of Early-stage, User-Based ResearchAdditional Q&A - Q: How can I distribute my questionnaire? If I am in the early stage of designing a specific product for India and I know my target audience... How can I reach them? Do you...Photonics.com 7/30/2014Smart Cameras: Technology and ApplicationsOver the past few years the capabilities of smart cameras have increased dramatically. Available image resolution has increased from 5 megapixels maximum to 21 megapixels. Processing power has...Photonics.com 3/13/2018Ultrafast Laser Micro-Machining – Fundamentals and Process OptimizationOver the last decade, material processing using ultrafast laser pulses with pulse durations in the range between 300 fs and about 15 ps has gained in popularity due to the small heat-affected zone...Photonics.com 9/15/2020Silicon Photomultiplier: Theory and PracticeThe silicon photomultiplier (SiPM), also known as Multi-Pixel Photon Counter (MPPC), is becoming a popular choice of a photodetector in applications where even single photons must be detected. The...Photonics.com 1/11/2017PHOTONICS DICTIONARY TERMSsubstrate blankMaterials (usually ceramics or other semiconductors) that are molded into approximate forms to use as supports for large mirrors or as blocks for microcircuits.EDU.photonics.com 9/8/2009conduction bandA partially filled or empty energy band through which electrons can move easily. The material can therefore carry an electric current. 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See where lighting and display technology might be headed – this week on Light Matters!Photonics.com 8/12/2015Spectroscopy Optics - LIGHT MATTERS 03.13.2013-Laser Cancer Test -IR Polution Detector -GRIN Wins On today’s show, spectroscopy could lead to better optical devices, a laser test for breast cancer readies for human trials, an IR camera detects...Photonics.com 3/13/2013PIC Fundamentals, Design at Heart of AIM Photonics Summer AcademyStudents from large and small size companies and bigger Department of Defense affiliates of the AIM Photonics Institute took part in the recent AIM Photonics Summer Academy at MIT. This was the third...Photonics.com 7/30/2018Photonics on the Showroom Floor and in the Lab - LIGHT MATTERS 02.2018On this month's episode of Light Matters, we take you on a brief tour of the Higgins Laboratories at Worcester Polytechnic Institute (WPI). Quinsigamond Community College and WPI received a $4M grant...Photonics.com 2/21/2018PHOTONICS BUYERS' GUIDE CATEGORIESMicrolens ArraysPhoton CountersA photon counter is a device used to evaluate the luminance of a surface by determining the number of photons emitted from a sample surface area.Picosecond DetectorsEducational CoursesCOMPANIESSPIE, The International Society for Optics and PhotonicsPhotonics Buyers' GuideKentek Corp.Laser safety eyewear, barriers & signs, laser components, laser replacement parts, laser accessories, medical laser safety eye protection - find these LaserSmart® products and more in the...Photonics Buyers' GuidePhotonics MediaPhotonics Media is the publisher of Photonics Spectra, BioPhotonics, EuroPhotonics, and Vision Spectra magazines in print, digital and mobile app formats; the Photonics Marketplace featuring the...Photonics Buyers' Guide