Flexible distributed feedback lasers based on nanoimprinted cellulose diacetate with efficient multiple wavelength lasing
Multi-colored polymer lasers Highly luminescent polymers can work as lasers when incorporated with suitable cavities and now the nano-imprinting makes the fabrication much cheaper and more scalable. An international team led by Prof Juan Cabanillas-Gonzalez from Madrid Institute for Advanced Studies...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | article |
| Language: | EN |
| Published: |
Nature Portfolio
2019
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| Subjects: | |
| Online Access: | https://doaj.org/article/530d7e40fdbf4acea7bf44e7d5c4ebf9 |
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| Summary: | Multi-colored polymer lasers Highly luminescent polymers can work as lasers when incorporated with suitable cavities and now the nano-imprinting makes the fabrication much cheaper and more scalable. An international team led by Prof Juan Cabanillas-Gonzalez from Madrid Institute for Advanced Studies in Nanoscience, Spain demonstrates transparent all-polymer distributed feedback (DFB) lasers in blue, green, yellow and red. The most important step is to make sub-wavelength periodic gratings on the flexible and highly transparent cellulose diacetate substrates by thermal nano-imprinting with high fidelity to maximize the constructive interference effect. As a result, these lasers show narrow linewidths below 1 nm at low power thresholds of several μJ cm^−2, which is comparable to conventional approaches. This large area nano-imprinting method is scalable and adaptable and it enables stackable multi-colored laser emission. |
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