Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells
Manipulation of the performance of the random lasers from dye-doped nematic liquid crystals with TiN nanoparticles in non-oriented cells is studied. The experimental results show that the introduction of TiN nanoparticles into dye-doped nematic liquid crystals significantly reduces the threshold of...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-12-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/10/1/199 |
| _version_ | 1828189164269469696 |
|---|---|
| author | Yuan Wan Luogen Deng |
| author_facet | Yuan Wan Luogen Deng |
| author_sort | Yuan Wan |
| collection | DOAJ |
| description | Manipulation of the performance of the random lasers from dye-doped nematic liquid crystals with TiN nanoparticles in non-oriented cells is studied. The experimental results show that the introduction of TiN nanoparticles into dye-doped nematic liquid crystals significantly reduces the threshold of random lasing due to the localized surface plasmon resonance of TiN nanoparticles. The emission spectrum of random lasers can be controlled by the shape of the pump spot. The threshold of random lasers increases with the decrease of the length of pump stripe. In order to obtain the emission spectrum with fine discrete sharp peaks, the narrow pump stripe is more effective than the circular pump spot. When the pump area is more like a circle, the emission spectrum is more like an amplified spontaneous emission. The underlying mechanisms of these phenomena are discussed in detail. This study provides a promising platform for designing the high-quality and low-threshold random lasers which can be controlled by the shape of the pump spot. |
| first_indexed | 2024-04-12T08:01:15Z |
| format | Article |
| id | doaj.art-9c36653a9c214ec5a4e6f6b72dcf1e4b |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-12T08:01:15Z |
| publishDate | 2019-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-9c36653a9c214ec5a4e6f6b72dcf1e4b2022-12-22T03:41:19ZengMDPI AGApplied Sciences2076-34172019-12-0110119910.3390/app10010199app10010199Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented CellsYuan Wan0Luogen Deng1School of Physics, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Physics, Beijing Institute of Technology, Beijing 100081, ChinaManipulation of the performance of the random lasers from dye-doped nematic liquid crystals with TiN nanoparticles in non-oriented cells is studied. The experimental results show that the introduction of TiN nanoparticles into dye-doped nematic liquid crystals significantly reduces the threshold of random lasing due to the localized surface plasmon resonance of TiN nanoparticles. The emission spectrum of random lasers can be controlled by the shape of the pump spot. The threshold of random lasers increases with the decrease of the length of pump stripe. In order to obtain the emission spectrum with fine discrete sharp peaks, the narrow pump stripe is more effective than the circular pump spot. When the pump area is more like a circle, the emission spectrum is more like an amplified spontaneous emission. The underlying mechanisms of these phenomena are discussed in detail. This study provides a promising platform for designing the high-quality and low-threshold random lasers which can be controlled by the shape of the pump spot.https://www.mdpi.com/2076-3417/10/1/199random laserstin nanoparticleslocalized surface plasmon resonancemultiple scattering |
| spellingShingle | Yuan Wan Luogen Deng Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells Applied Sciences random lasers tin nanoparticles localized surface plasmon resonance multiple scattering |
| title | Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells |
| title_full | Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells |
| title_fullStr | Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells |
| title_full_unstemmed | Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells |
| title_short | Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells |
| title_sort | pump controlled plasmonic random lasers from dye doped nematic liquid crystals with tin nanoparticles in non oriented cells |
| topic | random lasers tin nanoparticles localized surface plasmon resonance multiple scattering |
| url | https://www.mdpi.com/2076-3417/10/1/199 |
| work_keys_str_mv | AT yuanwan pumpcontrolledplasmonicrandomlasersfromdyedopednematicliquidcrystalswithtinnanoparticlesinnonorientedcells AT luogendeng pumpcontrolledplasmonicrandomlasersfromdyedopednematicliquidcrystalswithtinnanoparticlesinnonorientedcells |