Search by tag «Lasers» 22 results
An international team of researchers announced the development of the world’s most compact semiconductor laser that works in the visible range at room temperature. According to the authors of the research, the laser is a nanoparticle of only 310 nanometers in size (which is 3,000 times less than a millimeter) that can produce green coherent light at room temperature. The research article was published in ACS Nano.
Scientists Use Lasers and Gold Particles to Turn Titanium Oxide Into Nanocomposite for Photocatalysts
Oxides of different metals often serve as photocatalysts in various systems such as air purification, reactions of water decomposition and even in the production of self-cleaning surfaces for glass and mirrors. The physical-chemical properties of such materials can be improved by adding nanoparticles, which turn an ordinary oxide into a nanomaterial with new capabilities. To successfully perform this, however, it is necessary to understand the processes going on as a nanocomposite is being formed, and to be able to control them. ITMO University researchers together with their colleagues from France and the USA have demonstrated how a femtosecond laser can be used to tune the structure and nanocomposite properties for titanium dioxide films filled with gold nanoparticles. The paper was published in ACS The Journal of Physical Chemistry C.
Almost all of us store data on cloud services and use social networks. Some know that servers hosting that data occupy whole buildings and require significant resources to maintain. The world’s best researchers are at work trying to make data hosting more affordable, secure and user-friendly, but no revolutionizing changes have happened so far. Recently, Alexandra Kalashnikova, a physicist at the Ioffe Institute and ITMO University, along with colleagues from Radboud University Nijmegen (the Netherlands) and the Prokhorov General Physics Institute of the Russian Academy of Sciences have published a paper in Physics Reports. In the article, researchers explain why the industry hasn’t yet begun recording data on HDDs with lasers, or dropped disk drives altogether. Alexandra told ITMO.NEWS more about the paper.
Last year, Evgeniy Odlyanitskiy, ITMO University Faculty of Photonics and Optical Information’s PhD student, was invited for a six-month long internship at the University of Bordeaux in France. In six months, the Russian-French research team was supposed to create a laser system that is able to take high-quality pictures of objects in terahertz frequency range with subwave resolution. At the moment, the only system of that kind is located in Japan. Evgeniy was supposed to create his own version to be applied in the field of biophotonics. Read on to learn more about his research process and achieved results in this ITMO.NEWS article.
Scientists from ITMO and S.N. Fyodorov Eye Microsurgery Complex Have Developed and Introduced New Laser Method for Cataract Surgery
Cataract is among the most widespread eye diseases. According to WHO, up to a third of all visual impairments have to do with cataract. The treatment methods are well-known but can sometimes be traumatizing. Scientists from ITMO and the S.N. Fyodorov Eye Microsurgery Complex spent over 20 years working on reducing the side effects of cataract surgery. As a result, they came up with a technology where a laser is used both to destroy the clouded eye lens and to stimulate the regeneration of adjacent tissue. The researchers gave a detailed description of their method in an article that has been recently published in Optical and Quantum Electronics.
Daniil Nikitichev, a graduate of ITMO’s Faculty of Laser and Light Engineering, has been living and doing research in the UK for the past 12 years. His current work at the Department of Medical Physics and Biomedical Engineering of University College London (Top 7 in the QS World Rankings) is dedicated to developing a 3D printer that would be able to print soft models for training medical specialists. In this interview with ITMO.NEWS, the researcher shares about the importance of networking and his career path, as well as recollects what it was like to move to another country.
The Nobel week has just ended in Stockholm. Scientists Arthur Ashkin, Gerard Mourou, and Donna Strickland were awarded the 2018 Nobel Prize in Physics for breakthroughs in the field of lasers. According to the Royal Swedish Academy of Sciences, “the inventions being honored this year have revolutionized laser physics”. In this article, ITMO researchers talk about the significance of the inventions.
Scientists from ITMO University’s Research Institute of Laser Physics have developed a high-power laser with short pulse duration for use in a lunar laser locator. The locator will make it possible to measure the distance between the Moon and Earth with a margin of error of just a few millimeters. This would make it possible to correct calculations of celestial coordinates of the Moon in order to improve the accuracy of satellite navigation systems. An article on the new laser was published in Optics Letters.
How can we make a laser that will work effectively on low pump energy, be quite small and will allow dynamically changing the output radiation spectrum? Vladimir Borisov, a PhD student at ITMO’s Department of Photonics and Optical Information Technologies, has won a grant of the Russian Foundation for Basic Research for creating just such a laser. One of the advantages of the new device is that the resonator is placed in the active laser medium, which simplifies the design while changing the resonator itself; it is created by holographic grating and uses quantum dots as photon sources.
The 18th Lasers&Photonics Congress has just kicked off in St. Petersburg; it includes several conferences, schools for young scientists and students, and an exhibition on laser and optoelectronic technologies. The main topics of the congress are: research into quantum dots and their practical application in lasers, a new concept of lasers based on topological insulators, as well as the possibilities offered by the European X-ray free-electron laser (XFEL), experiments on which began last autumn. These topics were discussed during the plenary presentations by the event’s main speakers. The congress is organized by ITMO University together with its partners.