Dark spots in a beam known as optical vortices can produce new and intriguing effects when used along with polarization control in a microscope. To highlight breakthroughs in this area, the editors of Optics Express, the Optical Society's (OSA) open-access journal, today published a special focus issue on Unconventional Polarization States of Light. The issue was organized and edited by Thomas G. Brown of the Institute of Optics at the University of Rochester and Qiwen Zhan of the University of Dayton.
"What once was a side curiosity of optics is now joining the mainstream, both in fundamental investigations and in applications," said Brown. "Research in this focus issue will cover polarization breakthroughs that have the potential to affect a broad range of disciplines – from nanomaterials to laser devices."
The polarization of light can play an important role in optical trapping, interaction with nanostructures, and focusing in microscopy. The seminal work in the mid-1990s by Colin Sheppard, now at the National University of Singapore, and Dennis G. Hall now at Vanderbilt University launched a flurry of studies in the last decade on the creation and focusing of polarized beams that have certain geometrical symmetries. Beams with a spoke-like 'radial' polarization were of particular interest because of their potential for creating small focal regions of axially polarized light, a key requirement for interacting with nanostructures and coupling to fields tightly confined to metal surfaces. For unconventional polarization states of light, the geometrical arrangement of the polarization can produce vortex behavior in beam propagation, a result that has intrigued physicists and changed how optical engineers think about illumination in microscopes and lithography systems. Meanwhile, the creation of unconventional polarization states within compact laser cavities has offered new ways to begin incorporating these states into more complex optical systems.
Key Findings & Selected Papers
The following papers are some of the highlights of the Optics Express focus issue on Unconventional Polarization States of Light. All are included in volume 18, issue 10 and can be accessed online at http://www.OpticsInfoBase.org/OE.
"On the experimental investigation of the electric and magnetic response of a single nanostructure." Peter Banzer, Ulf Peschel, Susanne Quabis, and Gerd Leuchs, Max Planck Institute for the Science of Light. pp. 10905-10923.
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-18-10-10905New research from the University of Dayton on the stable production of radial, azimuthal and other more complex vectorial beams from a fiber laser.
"Vectorial fiber laser using intracavity axial birefringence." Renjie Zhou, Joseph W. Haus, Peter E. Powers, and Qiwen Zhan, University of Dayton. pp. 10839-10847.
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-18-10-10839A new paper from the University of Rochester that provides an experimental and theoretical analysis of laser beams that contain every possible state of polarization within the cross section of the beam, and the propagation laws that govern those beams.
"Full Poincaré beams." Amber M. Beckley, Thomas G. Brown, and Miguel Alonso, University of Rochester. pp. 10777-10785.
About Optics Express
Optics Express reports on new developments in all fields of optical science and technology every two weeks. The journal provides rapid publication of original, peer-reviewed papers. It is published by the Optical Society and edited by C. Martijn de Sterke of the University of Sydney. Optics Express is an open-access journal and is available at no cost to readers online at http://www.OpticsInfoBase.org/OE.
Uniting more than 106,000 professionals from 134 countries, the Optical Society (OSA) brings together the global optics community through its programs and initiatives. Since 1916 OSA has worked to advance the common interests of the field, providing educational resources to the scientists, engineers and business leaders who work in the field by promoting the science of light and the advanced technologies made possible by optics and photonics. OSA publications, events, technical groups and programs foster optics knowledge and scientific collaboration among all those with an interest in optics and photonics. For more information, visit http://www.osa.org.
Angela Stark | EurekAlert!
Sharpening the X-ray view of the nanocosm
23.03.2018 | Changchun Institute of Optics, Fine Mechanics and Physics
Drug or duplicate?
23.03.2018 | Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.
The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
23.03.2018 | Event News
19.03.2018 | Event News
16.03.2018 | Event News
23.03.2018 | Materials Sciences
23.03.2018 | Agricultural and Forestry Science
23.03.2018 | Physics and Astronomy