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Breakthroughs Bring THz Spectroscopy, Sensing Closer to Mainstream
The terahertz (THz) electromagnetic spectrum (1 to 10 THz), sitting between the infrared wavelengths on the higher frequency side and microwaves on the lower frequency side, has unique and important properties. THz waves can pass through a number of materials, including synthetics, textiles, paper and cardboard. Many biomolecules, proteins, explosives or narcotics feature characteristic absorption lines — so-called spectral “fingerprints” — at frequencies between 1 and
Photonics Spectra, December 2016
OLEDs Step In Where Design Matters
The near-ideal visual characteristics of OLED displays mean OLEDs will thrive as a mainstream display technology in coming years, while their compatibility with flexible and transparent materials is creating a new market for displays.
Photonics Spectra, December 2016
No One-Size-Fits-All Approach to Selecting Optical Coatings
Optical coating design and performance are critical for a growing number of applications in fields as diverse as biomedicine and astronomy. Coatings can perform a variety of functions, from imparting high reflectivity on telescope mirrors, to...
Photonics Spectra, December 2016
Wavefront Sensing Under Unique Lighting Conditions
While the invention of the general principle of Hartmann wavefront sensing goes back to the beginning of the 20th century1, the advent of industrial cameras and micro lenses in the 1970s facilitated broader applications2. Nowadays, Shack-Hartmann...
Photonics Spectra, December 2016
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Medical Lasers Cut and Heal
For medical lasers, the future may include both addition and subtraction. That’s because, in medicine, lasers have traditionally been used for ablation, cutting and other processes that remove tissue. Now researchers and companies are looking into...
Photonics Spectra, December 2016
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Airborne Optics to See and Strike
For optics, part of the future is up in the air. Airborne imaging depends on optics to get light where it needs to go. Now, larger detectors in traditional imaging bands, and others that operate in relatively new spectral ranges, are forcing optical...
Photonics.com, December 2016
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Solar Steps Up
Despite a challenging environment, there is hope for the solar market with progress being made across many areas of technology. While the advances may not be revolutionary, the small steps toward improving the key features of cost, efficiency and...
Photonics.com, December 2016
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Overcoming Precision-Guided Munitions, Sensing Challenges
Situational awareness is an ever-increasing challenge for armed forces deployed across vast areas and engaged in multiple conflicts. Modern soldiers have become data collectors in today’s complex command, communication and control systems, and...
Photonics.com, December 2016
New Milestone in Laser Bonding
The demand for lightweight construction and economic efficiency has led to R&D efforts in metal-plastic combinations. Although primarily driven by the automotive industry, this has become an increasingly important topic for other industries as...
Photonics Spectra, October 2016
Femtosecond Lasers Power New Approaches in Optogenetics
One of the most active and exciting areas in neuroscience is the use of optogenetics to unravel how neural pathways in the brain process and transmit information. Optogenetics involves the use of light-sensitive opsins — a special class of...
Photonics Spectra, November 2016
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Optical Materials of Tomorrow
From silicon photonics and quantum dots to metamaterials and carbon nanotubes, innovative materials promise a faster, brighter and more integrated future. While some materials have already enjoyed a measure of commercial success, for others, the...
Photonics Spectra, November 2016
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In Vitro Diagnostics, Immunology Spurring Advances in Flow Cytometry
Cells are the building blocks of organisms. From yeast and bacteria to elephants and whales, cells are the fundamental units of both biological structure and function. They have long been the subject of intense study: to better understand how they...
Photonics Spectra, November 2016
Quantum Cascade Laser Breakthrough for Advanced Remote Detection
The atoms in a molecule can bend, stretch and rotate with respect to one another, and these excitations are largely optically active. Most molecules, from simple to moderately complex, have a characteristic absorption spectrum in the 3- to...
Photonics Spectra, November 2016
A High-Resolution View of the Universe
Under ideal circumstances, the resolution of an optical system is limited by the diffraction of light waves. This diffraction limit, the maximum resolution a telescope can achieve, improves linearly with the telescope’s aperture. However, the...
Photonics Spectra, November 2016
Laser Welding Joins the Lightweighting Trend
To return the Cadillac brand to the global prestige luxury stage, General Motors threw as much as it could — 13 materials in all — into the sedan’s body to make it the lightest vehicle in its class. And then to join this...
Photonics.com, September 2016
Machine Vision Helps Adhesive Trend Stick in Auto Industry
Business has been getting stickier for Ron Weber, president of USS Vision, a Livonia, Mich., machine vision integration and automated inspection system firm. As automakers race to meet federal regulations that call for higher fuel-efficiency...
Photonics.com, September 2016
Two-Photon Polymerization: Additive Manufacturing From the Inside Out
The 20th century was an era of revolutionary materials science development, as plastics, semiconductors and biomaterials were introduced, and established materials such as metals and ceramics were significantly upgraded. These new and improved...
Photonics.com, September 2016
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Great Strides in Optical Fabrication
In 2018, a six-and-a-half-meter mirror made up of 18 hexagonal segments will quietly unfurl 1.5 million km from Earth, marking the end of years of intense research and refining of optics fabrication techniques. In the silence of space, the James...
Photonics Spectra, October 2016
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Two-Dimensional MEMS Arrays Pave Way for Mobile Spectrometers
In the field of near-infrared (NIR) spectroscopy, a system that combines portability with the accuracy and functionality of high-performance laboratory systems would significantly enhance real-time analysis. The development of small handheld...
Photonics Spectra, October 2016
Maximum Exposure: Ray-Tracing Software Optimizes Reflector Design
The concentrated solar market is often overshadowed by photovoltaic (PV) panels, yet the market segment is expected to grow by nearly 20 percent annually through 2020. Concentrated solar power — or CSP — has unique performance advantages...
Photonics Spectra, October 2016
3D Displays Get Closer but Face Hurdles
For viewers, a trip into the third dimension is getting cheaper and more satisfying. It also could be getting a lot nearer, driven by changes in photonics, optics and the market. Further out lies the possibility of 3D displays that mimic what is...
Photonics Spectra, October 2016
THz Photonics: Delivering Fiber Data Rates on Radio Channels
The development of THz devices, operating at fiber optic wavelengths, could soon cover the last available part of the spectrum — millimeter/submillimeter frequencies — tackling the problem of bandwidth requirements for mobile end-user connectivity.
Photonics.com, September 2016
For Compactness and Ruggedness, Linear Variable Filters Fit the Bill
Spectroscopic optical applications have conventionally utilized dispersive elements such as diffraction gratings and, less commonly, prisms to separate light into its constituent wavelengths for spectral interrogation. Gratings have the advantage in...
Photonics Spectra, September 2016
Member Exclusive
For MEMS Displays, Projections of Success
When it comes to microelectromechanical systems (MEMS)-based displays, what’s old is new — and now the only game in town. The old, and now only, technology involves projectors, which exploit MEMS chips to create images by bouncing light off either...
Photonics Spectra, September 2016
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Testing the Limits of Excimer Lasers: Annealing for Advanced Displays
Low-temperature polycrystalline silicon is increasingly used as the thin-film transistor material on the glass backplanes of high-performance displays, particularly for smartphones. These thin films are fabricated on large glass panels that then are...
Photonics Spectra, September 2016
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