High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks
Lasers based on Fabry–Pérot or whispering gallery resonators generally require complex fabrication stages and sensitive alignment of cavity configurations. The structural defects on reflective surfaces result in scattering and induce optical losses that can be detrimental to laser performance. On th...
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Online Access: | http://dx.doi.org/10.1063/5.0020528 |
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doaj-94c4e49ab0cf44fdb51d25711d378e992020-11-25T04:04:33ZengAIP Publishing LLCAPL Photonics2378-09672020-10-01510106105106105-910.1063/5.0020528High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracksItir Bakis Dogru-Yuksel0Mertcan Han1Gregor Pirnat2Emir Salih Magden3Erkan Senses4Matjaž Humar5Sedat Nizamoglu6Graduate School of Biomedical Sciences and Engineering, Koc University, Sariyer, Istanbul 34450, TurkeyDepartment of Electrical and Electronics Engineering, Koc University, Sariyer, Istanbul 34450, TurkeyDepartment of Condensed Matter Physics, J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, SloveniaDepartment of Electrical and Electronics Engineering, Koc University, Sariyer, Istanbul 34450, TurkeyDepartment of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, TurkeyDepartment of Condensed Matter Physics, J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, SloveniaGraduate School of Biomedical Sciences and Engineering, Koc University, Sariyer, Istanbul 34450, TurkeyLasers based on Fabry–Pérot or whispering gallery resonators generally require complex fabrication stages and sensitive alignment of cavity configurations. The structural defects on reflective surfaces result in scattering and induce optical losses that can be detrimental to laser performance. On the other hand, random lasers can be simply obtained by forming disordered gain media and scatterers, but they generally show omnidirectional emission with a low Q-factor. Here, we demonstrate directional random lasers with a high Q-factor emission (∼1.5 × 104) via self-assembled microstructural cracks that are spontaneously formed upon radial strain-release of colloidal nanoparticles from the wet to dry phase. The rough sidewalls of cracks facilitate light oscillation via diffuse reflection that forms a spatially localized feedback, and they also serve as the laser out-coupler. These self-assembled cracks exhibit random lasing at optical pump powers as low as tens of μJ/mm2. We demonstrate a wide variety of random lasers from nano- and biomaterials including silica nanoparticles, fluorescent proteins, and biopolymers. These findings pave the way toward self-assembled, configurable, and scalable random lasers for sensing, displays, and communication applications.http://dx.doi.org/10.1063/5.0020528 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Itir Bakis Dogru-Yuksel Mertcan Han Gregor Pirnat Emir Salih Magden Erkan Senses Matjaž Humar Sedat Nizamoglu |
spellingShingle |
Itir Bakis Dogru-Yuksel Mertcan Han Gregor Pirnat Emir Salih Magden Erkan Senses Matjaž Humar Sedat Nizamoglu High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks APL Photonics |
author_facet |
Itir Bakis Dogru-Yuksel Mertcan Han Gregor Pirnat Emir Salih Magden Erkan Senses Matjaž Humar Sedat Nizamoglu |
author_sort |
Itir Bakis Dogru-Yuksel |
title |
High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks |
title_short |
High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks |
title_full |
High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks |
title_fullStr |
High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks |
title_full_unstemmed |
High-Q, directional and self-assembled random laser emission using spatially localized feedback via cracks |
title_sort |
high-q, directional and self-assembled random laser emission using spatially localized feedback via cracks |
publisher |
AIP Publishing LLC |
series |
APL Photonics |
issn |
2378-0967 |
publishDate |
2020-10-01 |
description |
Lasers based on Fabry–Pérot or whispering gallery resonators generally require complex fabrication stages and sensitive alignment of cavity configurations. The structural defects on reflective surfaces result in scattering and induce optical losses that can be detrimental to laser performance. On the other hand, random lasers can be simply obtained by forming disordered gain media and scatterers, but they generally show omnidirectional emission with a low Q-factor. Here, we demonstrate directional random lasers with a high Q-factor emission (∼1.5 × 104) via self-assembled microstructural cracks that are spontaneously formed upon radial strain-release of colloidal nanoparticles from the wet to dry phase. The rough sidewalls of cracks facilitate light oscillation via diffuse reflection that forms a spatially localized feedback, and they also serve as the laser out-coupler. These self-assembled cracks exhibit random lasing at optical pump powers as low as tens of μJ/mm2. We demonstrate a wide variety of random lasers from nano- and biomaterials including silica nanoparticles, fluorescent proteins, and biopolymers. These findings pave the way toward self-assembled, configurable, and scalable random lasers for sensing, displays, and communication applications. |
url |
http://dx.doi.org/10.1063/5.0020528 |
work_keys_str_mv |
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