Search
Menu
Sheetak - Cooling at your Fingertip 11/24 LB
submit feature idea
Features

A Laser’s Force Dampens Cantilever Action
David M. Weld and Aharon Kapitulnik of Stanford University in California recently demonstrated that even low-power lasers pack a punch. Using laser-driven radiation pressure force-feedback, they reduced the effective quality factor and temperature of a silicon nitride microcantilever by more than a factor of 15. For cantilever-based gravity experiments, physicists at Stanford University developed a force-feedback mechanism that uses radiation pressure provided by a second laser in the...
Photonics Spectra, January 2007
A Wealth of Opportunities from a Little Generosity
At heart, I’m a scientist and an engineer. I enjoy the process of figuring out how things work and how various pieces fit together to make an efficiently functioning system. The challenge of solving problems, whether in optics, information...
Photonics Spectra, January 2007
Cavity-Enhanced Absorption Spectroscopy
Detects Geothermal Gases
Gas phase chromatography and mass spectrometry often are used to analyze volcanic emissions because of their ability to detect low levels of trace gases. However, these techniques are limited by their instrumental complexity and inability to...
Photonics Spectra, January 2007
Converging Complexity Challenges Educators to Prepare Tomorrow’s Innovators
Although there is much publicity and debate in the US over the outsourcing of engineering jobs to countries that pay lower wages, the problem is the dearth of graduating engineers for those jobs.1 The challenge to US educators remains the same...
Photonics Spectra, January 2007
Correlating Excitation and Emission Wavelengths Yields Analysis of Complex Chemical Environments
Spectroscopically scrutinizing chemicals within complex environments — such as inside cometary matter or combustible materials — is challenging because many molecules absorb and emit at similar wavelengths, confounding spectral analysis....
Photonics Spectra, January 2007
Current Trends in Machine Vision
More than 25 years after machine vision appeared in the industrial automation marketplace, the technology has established itself as a necessary part of high-quality, cost-effective manufacturing. Over the past decade, the capabilities promised from...
Photonics Spectra, January 2007
Fast Light, Slow Light and Optical Precursors: What Does It All Mean?
The speed of light in vacuum (c ≈ 3 × 108 m/s) is an important physical constant that appears in Maxwell’s theory of electromagnetism. For this reason, scientists have endeavored to measure it with very high precision, making it...
Photonics Spectra, January 2007
Forecast for 2007: Nano Gets Big
Not long ago, nanometer-scale positioning was a laboratory curiosity. Today, the robust and responsive nanopositioning provided by piezoelectric actuation is more vital than ever in the lab and has become an essential commodity for industries...
Photonics Spectra, January 2007
Intrazeolite PbS Quantum Dots with Nonlinear Properties Observed
At Sogang University in Seoul, South Korea, scientists have successfully incorporated lead sulfide quantum dots into zeolite-Y films and found high levels of third-order nonlinear optical activity. The material could be used for optical switches,...
Photonics Spectra, January 2007
Machine Vision in Germany and Europe
Machine vision technology remains the key to quality, productivity and competitiveness in production. It also is extending beyond the traditional factory applications and beginning to conquer new markets such as robotic vision. In Europe and,...
Photonics Spectra, January 2007
New Laser Export Controls Set to Take Effect
The Wassenaar export controls exist to limit the shipment of products that have potential military applications to non-Wassenaar countries whose military and/or political motivations are unclear. The 40 Wassenaar countries (see table) agree on a...
Photonics Spectra, January 2007
Playing Rough to Get the Light Out
Researchers at the Electronics and Telecommunications Research Institute of Daejeon, South Korea, have shown that, when it comes to getting a silicon quantum dot LED to shine, it helps to play rough — at least with the surface. The group enhanced...
Photonics Spectra, January 2007
Searching for the Source of Stradivari’s Sublime Sound
Musicians and listeners alike have debated for centuries why instruments crafted by Italian master Antonio Stradivari have such a sublime sound. Modern technology may at last have found the answer. Researchers used solid-state nuclear magnetic...
Photonics Spectra, January 2007
Sharp Corners and Kaleidoscopes Lead to Novel Microscopy Techniques
Researchers at Harvard Medical School in Boston have developed two microscopy techniques: a near-field method that offers potentially better performance than other superresolution techniques and a “mirror tunnel” approach that promises...
Photonics Spectra, January 2007
Silicon Nanowires Act as Nanoscale Avalanche Photodetectors
Researchers at Harvard University in Cambridge, Mass., have synthesized PIN silicon nanowires with single-crystal structures and uniform diameters that demonstrate potential for use as avalanche photodetectors in integrated photonic systems. The...
Photonics Spectra, January 2007
Transient Form of Two-Dimensional IR Spectroscopy
Shows Molecules in Motion
Understanding the way that molecules operate means digging deeply — examining not only their structures, but also how they change shape under various conditions. Techniques such as nuclear magnetic resonance and x-ray crystallography help...
Photonics Spectra, January 2007
White Polymer LEDs Incorporate New Dopant
Researchers at the Chinese Academy of Sciences in Beijing and at the University of California, Los Angeles, have demonstrated white LEDs that feature emission layers of the orange-emitting polymer...
Photonics Spectra, January 2007
3-D Vision Gets Real
Many classes of commercial and consumer products would benefit from the ability to visually sense their environment and react to what is happening in real time. These products would have to operate in dynamic, variably lit real-world environments....
Photonics Spectra, December 2006
Adaptive Headlights Aim to Ease Nighttime Driving Hazards
Despite the fact that the optical performance of novel headlight systems for motor vehicles has increased impressively in recent years, nighttime driving is still loaded with risks. In Europe, for example, 47 percent of all fatalities happen at...
Photonics Spectra, December 2006
Adaptive Optical Solutions
The fundamental dilemma in forward lighting is the converse relationship between providing sufficient visibility for the driver and limiting the excess glare generated toward oncoming traffic. Research performed at the University of Michigan...
Photonics Spectra, December 2006
Capturing Hot Fluorescent Images
Roberto Etchenique and Oscar Filevich of Universidad de Buenos Aires in Argentina were attempting to carry out time-lapse measurements of cell cultures in long-term experiments. However, for such investigations, temperature stability is a necessity....
Photonics Spectra, December 2006
Compound White OLED Proves Efficient
Researchers at Princeton University in New Jersey and at the University of Michigan in Ann Arbor have fabricated a compound fluorescent/phosphor-sensitized fluorescent white OLED capable of achieving 100 percent internal quantum efficiency. The...
Photonics Spectra, December 2006
Getting to the (Very Small) Point of Imaging
Sometimes ideas pan out better than expected. Such is the case with an imaging innovation from the University of Maryland, Baltimore County. Under the direction of assistant professor of chemistry and biochemistry Brian M. Cullum, researchers there...
Photonics Spectra, December 2006
Imperfect Tapping, Imperfect Image
Despite the saying, sometimes you can’t believe it when you see it. Researchers at Université de Technologie de Troyes in France, at the University of Illinois at Urbana-Champaign and at Argonne National Laboratory in Illinois have shown that this...
Photonics Spectra, December 2006
LEDs in Exterior Vehicle Lighting
LED lighting is a complete paradigm shift in vehicle lighting. Filament bulbs have been the only means for providing illumination in and on vehicles since 1910, when the first electric lamps were fitted to a production model. Now, solid-state...
Photonics Spectra, December 2006
(2,924 results found)

Explore Our Content
News
Features
Latest Products
Webinars
White Papers
All Things Photonics Podcast
Photonics Spectra Now
Videos
Our Summits & Conferences
Industry Events
Bookstore
Join Our Community
Subscribe
Advertise
Become a member
Sign in
Contribute a Feature
Suggest a Webinar
Submit a Press Release
Mobile Apps

About Us
Our Company
Our Publications
Editorial Advisory Board
Contact Us
Career Opportunities
Teddi C. Laurin Scholarship

Terms & Conditions
Privacy Policy
California Consumer Privacy Act (CCPA)



©2024 Photonics Media
100 West St.
Pittsfield, MA, 01201 USA
[email protected]
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.