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Photoluminescence Spectroscopy Optimizes Perovskite Quantum Dots Photoluminescence Spectroscopy Optimizes Perovskite Quantum Dots
Perovskite semiconductors have attracted tremendous attention in recent years because of the rapid rise of perovskite solar cell efficiencies — from less than 10% to more than 20% in less than five years — and the potential for the materials to provide low-cost solar power. The properties that make these materials well suited as absorber layers in solar cells also make them excellent emitters of light, and researchers have shifted their attention toward material optimization for...
Photonics.com, September 2019
Innovative Design of Optical Systems Boosts Industrial Metrology Innovative Design of Optical Systems Boosts Industrial Metrology
Image sensor evolution has been extremely expansive since the first digital camera was created in 1975. In more recent years, increasing use of image sensors has rapidly driven camera chip evolution in many aspects: resolution, sensitivity,...
Photonics Spectra, December 2019
Display Manufacturing Enriches Consumer Products Display Manufacturing Enriches Consumer Products
Consumer electronics are growing more sophisticated, at breakneck speed and with remarkable advancements in technology and refinement. A highly visible example is the ever-increasing picture clarity in large-screen TVs, and in the evolution of...
Photonics Spectra, September 2019
Demand for Versatile CMOS Sensors Continues to Grow Demand for Versatile CMOS Sensors Continues to Grow
Twenty-five years ago, physicist and engineer Eric Fossum predicted the end of the charge-coupled device (CCD) imaging sensor. Fossum, a Dartmouth University professor who was then at NASA’s Jet Propulsion Lab just north of Pasadena, Calif.,...
Photonics Spectra, September 2019
Fiber Optic Sensors Compete in Environmental Monitoring Market Fiber Optic Sensors Compete in Environmental Monitoring Market
Modern societies are facing rising concerns about global environmental issues, including an alarming rise in pollution of our seas, waterways, land, and air. As we bear witness to widespread industrialization along with mass consumption trends,...
Photonics.com, September 2019
Data Centers and More for Silicon Photonics Data Centers and More for Silicon Photonics
Decades of research and development are finally paying off for silicon nanophotonics. The silicon optical transceiver market, for example, is projected to grow nearly twentyfold in volume over the next five years, much of it driven by the needs of...
Photonics Spectra, August 2019
Robust Optical Materials for Aerospace and Laser Applications Robust Optical Materials for Aerospace and Laser Applications
While single-crystal materials and ceramics are not as widely used for optical applications as glass, there are niche applications, such as aerospace, submarine optronic, and high-energy laser windows, for which these materials are favored. The...
Photonics Spectra, August 2019
Protecting Photonic Quantum States Using Topology Protecting Photonic Quantum States Using Topology
The use of topology to protect quantum information is well known to the condensed-matter community and, indeed, topological quantum computing is a burgeoning field of research. It is one of the competing avenues to demonstrate that quantum computers...
Photonics Spectra, August 2019
Visible Entangled Photons from an Ultrafast Fiber Laser Source Visible Entangled Photons from an Ultrafast Fiber Laser Source
Entangled photons are key to the development of optical quantum technologies such as enhanced metrology, computing, and communication. It is projected that the global quantum communications market will reach $1.53 billion by 2023, with an estimated...
Photonics Spectra, August 2019
Long-Lifetime Laser Diodes for Space Long-Lifetime Laser Diodes for Space
There has been a flurry of announcements in the news recently about low-Earth-orbit satellite constellations, which are primarily expected to be able to provide wideband internet anywhere in the world. Many of these satellite networks will require...
Photonics Spectra, August 2019
Integrated Photonics Looks to Advance Safety for Lidar Integrated Photonics Looks to Advance Safety for Lidar
The history of radar (radio detection and ranging) dates back to the 1880s when renowned German physicist Heinrich Hertz showed that radio waves were reflected by metallic objects. Based on the principles demonstrated by Hertz, Christian...
Photonics Spectra, July 2019
On the Shoulders of Giants On the Shoulders of Giants
For millennia, scholars in the old and new worlds have realized that their efforts depend largely on the works of those who came before. The “eureka!” moments experienced by scientists and other observers of nature do arise, but there...
Photonics Spectra, June 2019
A History of the Laser: 1960 - 2019 A History of the Laser: 1960 - 2019
In 2020, the laser turns 60. This is a timeline of some of the more notable scientific accomplishments related to light amplification by stimulated emission of radiation (laser). An interactive version of the laser timeline is available, as well as...
Photonics Spectra, June 2019
Laser Pioneers Laser Pioneers
Listed here are many breakthroughs that followed the first ruby laser demonstration. Nearly all of the devices mentioned have played major roles in science or everyday life, and continue to today. This brief list of pioneers — not exhaustive...
Photonics Spectra, June 2019
Member Exclusive
An Avalanche of APD Innovations An Avalanche of APD Innovations
When autonomous vehicles hit the streets, they navigate with the help of avalanche photo­diodes, or APDs. These semiconductor photodetectors capture returning laser pulses as part of lidar systems, and this APD-derived data determines the distance...
Photonics Spectra, July 2019
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Backstory: Laser-Based Denim Finishing
Nearly 25 years ago, Icon Laser Technologies, a small startup in Florida, developed and patented (Patent 5567207) the first laser-based color-fading process for dyed denim garments and fabrics. Icon’s color-fading process was based on the...
Photonics Spectra, June 2019
Measuring Up with High-Power Fiber Lasers Measuring Up with High-Power Fiber Lasers
Fiber lasers are used in ever-increasing numbers across a range of applications. In the 2- to 20-kW-power output range, laser applications are growing in materials processing and in finesse applications such as 3D micromilling, microcutting,...
Photonics Spectra, July 2019
Backstory: VCSEL Breakthrough, 1989
Thursday, May 11, 1989 It was the first test of our first attempt to fabricate VCSELs. They lit up! Thousands of VCSELs on a crumb-size chip lased readily with low threshold currents (1s of mA), the smallest lasers in the world. The original ~6-...
Photonics Spectra, June 2019
Critical Considerations for Embedded Vision Design Critical Considerations for Embedded Vision Design
Embedded vision is a hot topic in many industrial spaces. The integration of data processing on board a camera without the need for a back-end PC, server, or other costly system has system developers — in industries from factory test and...
Photonics Spectra, July 2019
IR Metrology with Visible Light IR Metrology with Visible Light
IR instruments are indispensable tools for material analysis, environmental sensing, and homeland security. Through decades of development and commercialization, one common and significant limitation has been the weak efficiency of IR optical...
Photonics Spectra, July 2019
Photovoltaic Technologies Aim for Higher Efficiency Ratings Photovoltaic Technologies Aim for Higher Efficiency Ratings
In a time of growing concern about climate change and the high cost of humanity’s carbon footprint, there are glimmers of hope. A global boom in sustainable energy investment is underway. The Renewable Energy Policy Network for the 21st...
Photonics Spectra, July 2019
Laser World of Photonics 2019 Laser World of Photonics 2019
LASER World of PHOTONICS 2019, one of the largest photonics trade shows in Europe, will be held in Munich June 24-27. The biennial event will feature the latest in photonics research, technology, and applications. The fair will take place across...
Photonics Spectra, June 2019
Picosecond Lasers Transform Volume Manufacturing Picosecond Lasers Transform Volume Manufacturing
Laser micromachining has revolutionized volume manufacturing, enabling smaller feature sizes, novel device geometries and materials, improved process yields, and reduced production costs. Industries as diverse as consumer electronics, medical...
Photonics Spectra, June 2019
Optical Coatings with Atomic Precision Optical Coatings with Atomic Precision
Today, optical coatings are a commodity: They exist on all types of professional and consumer optics. Among the various technologies for depositing optical coatings1,2, atomic layer deposition (ALD) stands out for its conformal coating on...
Photonics Spectra, June 2019
LaserNetUS Reinvigorates Ultrahigh-Intensity Laser Research LaserNetUS Reinvigorates Ultrahigh-Intensity Laser Research
Since the invention of chirped pulse amplification (CPA) in 1985 by two of the three winners of the 2018 Nobel Prize in physics — Gérard Mourou and Donna Strickland — and the subsequent development of this technology into...
Photonics Spectra, June 2019
(2,985 results found)

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