Using direct laser writing to create 3D submicron structures

first_img New VECSEL could mean a step forward for spectroscopy More information: M. Thiel, J. Fischer, G. von Freymann, and M. Wegener, “Direct laser writing of three-dimensional submicron structures using a continuous-wave laser at 532 nm,” Applied Physics Letters (2010). Available online: link.aip.org/link/APPLAB/v97/i22/p221102/s1 Copyright 2010 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. Explore further Miniaturized replicate of the Brandenburg Gate in Berlin (Germany). Structure written by M. Thiel (Nanoscribe). Citation: Using direct laser writing to create 3D submicron structures (2010, December 16) retrieved 18 August 2019 from https://phys.org/news/2010-12-laser-3d-submicron.html The technique that Thiel refers to is one that involves using direct laser writing with a continuous-wave laser to create three dimensional submicron structures. This technique has the potential to be useful in a number of fields, and it offers opportunities to enhance lithography. Thiel and his colleagues, Fischer, von Freymann and Wegener, describe the experiments used to test their state-of-the-art technique in Applied Physics Letters: “Direct laser writing of three-dimensional submicron structures using a continuous-wave laser at 532 nm.”“We are already quite used to seeing lithography in two dimensions,” Thiel says. “Our new technique allows patterning in three dimensions. We use a very local writing tip that exposes only one spot, and that allows us to pattern in 3D.”In order to get this very local writing tip, Thiel and his fellow team members concentrated photons from a laser onto a photo-sensitive material. The tips can be directed by a computer, so it is possible to program the pattern on the computer, and then use the laser to create what has been programmed. “You pattern whatever you want,” Thiel says. “There are a number of possibilities.”One of the things that makes the patterning technique developed at the Karlsruhe Institute of Technology so unique is that a continuous-wave laser is used. When most scientists think of direct laser writing, they think of focused, mode-locked femtosecond laser pulses. “The continuous-wave laser makes it easier to produce for industry,” Thiel explains. “We wanted to show that you could still do direct laser writing with a continuous-wave laser, and we have shown that it is possible to get state-of-the-art results when using our technique to create submicron structures.”A continuous-wave laser is easier to direct, and it is less expensive than the femtosecond lasers used in the past. This, combined with the fact that Thiel and his colleagues were careful to demonstrate their technique using commercially available photoresists, creates a situation in which lithography for a variety of applications becomes possible.“There are several applications for direct laser writing,” Thiel points out. “Some of the customers who have bought our systems from Nanoscribe have used them to produce cloaking devices, and others have created metamaterials. There are applications in photonics, cell biology or microfluidics.”Thiel maintains that the ideal is to continue to improve the system so that the technique can become more widely available. “We are working to get the technique for direct writing of 3D structures up to the industrial standard for lithography,” he says. “Our system should be very easy for the customer to use, and it offers a number of opportunities for future applications.”“This 3D microworld is very fascinating,” Thiel continues. “And it’s no longer just a laboratory curiosity. You can use our technique to make a design file from your computer into a real structure.” (PhysOrg.com) — “Several groups have been using direct laser writing since the end of the 1990s,” Michael Thiel tells PhysOrg.com. Thiel is a scientist has been working at the Karlsruhe Institute of Technology (KIT) in Germany. “Direct laser writing has evolved rapidly, and direct laser writing is used in lithography. The group I have been working with has made even more improvements, and the technique we have developed is so successful that we spun off a company, Nanoscribe, which is located in an incubation facility on campus.” This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Read More
NASA develops Augmented Reality headset for commercial pilots

first_imgImage: NASA Automation in the air dulls pilot skill Augmented reality is where computer generated images are projected onto a piece of glass that the user looks through. In so doing, the user can see both the real world and the images that are displayed, which are tied to real world objects. An AR device for commercial pilots for example could display what looks like the actual runway (and tower, other planes, etc.) as a plane approaches for landing in fog. Once on the ground, it could display the runway centerline, as well as interconnecting runways, and the taxi pathway that is supposed to be followed. Because most commercial plane accidents occur during landing, takeoff or when taxiing, more focus has been aimed at providing tools to pilots to help them better see what is going on.The new AR headset is designed to do just that. It fits over the head, and has one eyepiece that the pilot looks through. It also uses gyroscopes and sensors that read pieces of paper placed on cabin walls to orient itself so that it can correctly interpret which direction the pilot is looking and respond accordingly. It also includes voice recognition software to allow the pilot to communicate with the system orally. Examples of Synthetic Vision System Displays. Image: NASA © 2011 PhysOrg.com Explore furthercenter_img The system is similar in some respects to AR headsets worn by pilots of military jets and helicopters and is an improvement over current headsets used on some commercial flights that overlay information in front of the pilot, but aren’t tied to the real world. None of the technology in the headset is new, and in fact all of the information they provide to a pilot is now currently available. The difference is the headset will allow the pilot to keep his or her eyes focused on where the plane is heading, rather than having to look away to study maps or electronic devices.The AR headset is part of a larger effort by NASA to improve visualization for pilots, called Synthetic Vision. The idea is to eventually move augmented reality imagery to the windshield in a way that is both informative and free of unnecessary clutter that could get in the way of actually flying the plane. Citation: NASA develops Augmented Reality headset for commercial pilots (2012, March 15) retrieved 18 August 2019 from https://phys.org/news/2012-03-nasa-ar-headset-commercial.html (PhysOrg.com) — NASA’s Langley Research Center in Virginia has been hard at work developing an Augmented Reality headset for use by commercial pilots to help reduce airline accidents due to poor weather and overcrowding at airports. The results of that effort have now become known as NASA has recently begun searching for a company to make and market the headset which thus far, doesn’t have an official name. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Read More
Intels Haswell to extend battery life set for Taipei launch

center_img More information: via Computerworld Intel will highlight next-gen Haswell processors at next week’s IDF Citation: Intel’s Haswell to extend battery life, set for Taipei launch (2013, May 25) retrieved 18 August 2019 from https://phys.org/news/2013-05-intel-haswell-battery-life-taipei.htmllast_img read more

Read More
Structured glam drama

Gupta’s show was high on drama. Models walked in with sideswept long bangs. Ivories with patches of neon on georgette and cotton formed jumpsuits, mermaid dresses, kaftans, blouses. The one-shouldered dress was spotted quite a few times. There were padded shoulders and halter necks, scooped ruches gathered at the neck, digital prints and more.There was a mix of structure and fluidity with lots of kimono sleeves and even some pre-stitched saris.

Read More
Medical student receives financial support from state

first_imgKolkata: The Mamata Banerjee government has extended all support to a medical student to carry on with his studies.Soujanya Chakraborty on Tuesday went to Nabanna, along with his father Niranjan Chakraborty. They went to the Chief Minister’s Office. Soujanya received a cheque of Rs 50,000 from the state government to carry on with his studies withoutfacing any trouble.He also received assurances of all the support required for continuing his studies. Also Read – Rain batters Kolkata, cripples normal lifeIt may be recalled that Chief Minister Mamata banerjee had mentioned about Soujanya while addressing the Martyrs’ Day’s rally.She said that she has come to know about him from an article in a Bengali daily and subsequently had a talk with him over telephone.She assured all help to Soujanya. It may be mentioned that the Mamata Banerjee government has taken several steps in the past seven years to ensure that children in the state can continue with their higher studies.She introduced the project ‘Kanyashree’ to extend support to girl students to continue with their higher studies.last_img read more

Read More
Dalit literature festival to be held in December

first_imgThe first edition of the Dalit Literature Festival will be held from December 6 to 8 on the 62nd death anniversary of B R Ambedkar, the organisers said on Friday.“An annual not-for-profit literary initiative, Dalit Literature Festival is envisioned as a unique festival built to promote Dalit literature,” said a press release issued by Dalit Literature Festival Planning Board.Dalit literature, whether oral or written, has been an integral and vibrant part of Indian literary tradition for centuries, said the release.The festival will also provide a stage for Dalit culture, arts, films, food, it said.“There are several writers, Dalit and non-Dalit, who have enriched Dalit literature and continue to be committed to this art form. Dalit literature is a movement of protest or awakening, considering its subjects are varied and contemporary,” it said.last_img read more

Read More
TMC sweeps up victory in ward 117 as Amit Singh wins by

first_imgKolkata: Trinamool Congress candidate Amit Singh has won the by-election in ward 117, by defeating his BJP rival by over 5,000 votes.Singh got 7,926 votes while Somnath Banerjee of BJP received 2,444 votes, losing by 5,482 votes. Singh is the son of Tarak Singh, who is the Member, Mayor-in-Council (Drainage) of Kolkata Municipal Corporation (KMC). Amitava Karmakar of CPI(M) got 1,011 votes, while Abhishek Singh of Congress bagged 436 votes only. Also Read – Rain batters Kolkata, cripples normal lifeThe seat fell vacant after Sailen Dasgupta of Trinamool Congress died in 2016. After this, the seat remained vacant for two years. BJP’s share of votes has gone down substantially. In 2015, when the KMC election took place, BJP received 4,026 votes while Dasgupta got 6,002 votes. Left Front has also witnessed a similar decline. In 2015, the Left Front candidate had received 2,600 votes, while Karmakar received 1,011. There are 18,893 voters in ward 117. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedCommenting on Amit’s success, Tarak Singh said people of the area have voted for development. In the past three and a half years, extensive development work has been carried out in the area. The condition of roads has been improved, better street lights have been installed and the parks that are situated in the ward have been upgraded. “People have voted for the extensive development work that has been carried out in the area,” Singh said. There will be another by-election in ward 82, where Mayor Firhad Hakim will be contesting on January 6, 2019. The seat fell vacant after the sitting Trinamool councillor Pranab Biswas resigned recently.last_img read more

Read More