Random lasing realized in n-ZnO/p-MgZnO core–shell nanowire heterostructures

CrystEngComm ◽  
2015 ◽  
Vol 17 (21) ◽  
pp. 3917-3922 ◽  
Author(s):  
Ying-Jie Lu ◽  
Chong-Xin Shan ◽  
Ming-Ming Jiang ◽  
Guang-Chong Hu ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Core Shell ◽  
Random Lasing ◽  
Random Lasers ◽  
Nanowire Heterostructures ◽  
Electrically Pumped ◽  
Low Threshold

Low threshold electrically pumped random lasers were realized in n-ZnO/p-MgZnO core–shell nanowire heterostructures.

scholarly journals Effect of Passivation Layer on the Thin Film Perovskite Random Lasers

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2322
Author(s):  
Subha Prakash Mallick ◽  
Yu-Heng Hong ◽  
Lih-Ren Chen ◽  
Tsung Sheng Kao ◽  
Tien-Chang Lu
Keyword(s):  
Air Force ◽  
Room Temperature ◽  
High Surface ◽  
Spatial Coherence ◽  
Random Lasing ◽  
Random Lasers ◽  
Scattering Effects ◽  
Low Threshold ◽  
Projection Images ◽  
Multiple Scattering Effects

Novel functionalities of disorder-induced scattering effect in random lasers, attributed to low spatial coherence, draw remarkable attention in high-contrast to superior quality speckle-free imaging applications. This paper demonstrates perovskite-polystyrene (PS)-based random lasing action with robust optical performance at room temperature. Optical characterizations are carried out upon perovskite thin films addition with polystyrene of different mixing concentrations (wt.%). A low threshold lasing operation is achieved with an increasing concentration of polystyrene, accompanying a wavy surface texture with high surface roughness. The rough surface dominating multiple scattering effects leads to enhanced feedback efficiency. Moreover, this study also elucidates efficient fabrication process steps for the development of high quality and durable PS-based random lasers. With the advantages of reduced coherent artifacts and low spatial coherence, speckle free projection images of the USAF (U. S. Air Force MIL-STD-150A standard of 1951) resolution test chart are shown for different PS-based random lasers.

scholarly journals Low-threshold electrically pumped ultraviolet random lasing from ZnO film prepared by pulsed laser deposition

2013 ◽  
Vol 62 (8) ◽  
pp. 084207
Author(s):  
Xu Yun ◽  
Li Yun-Peng ◽  
Jin Lu ◽  
Ma Xiang-Yang ◽  
Yang De-Ren
Keyword(s):  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Random Lasing ◽  
Zno Film ◽  
Electrically Pumped ◽  
Low Threshold

scholarly journals Pump-Controlled Plasmonic Random Lasers from Dye-Doped Nematic Liquid Crystals with TiN Nanoparticles in Non-Oriented Cells

2019 ◽  
Vol 10 (1) ◽  
pp. 199 ◽  
Author(s):  
Yuan Wan ◽  
Luogen Deng
Keyword(s):  
Liquid Crystals ◽  
Emission Spectrum ◽  
Localized Surface Plasmon Resonance ◽  
Nematic Liquid Crystals ◽  
Localized Surface Plasmon ◽  
Random Lasing ◽  
Random Lasers ◽  
Tin Nanoparticles ◽  
Low Threshold ◽  
Underlying Mechanisms

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.

Electrical Pumped ZnO UV Random Lasers

2007 ◽  
Vol 1035 ◽  
Author(s):  
S. Yu ◽  
Eunice Sok Ping Leong
Keyword(s):  
Light Emission ◽  
Low Cost ◽  
Laser Diodes ◽  
Optical Gain ◽  
Short Review ◽  
Stringent Requirement ◽  
Random Lasers ◽  
Electrically Pumped ◽  
The Media ◽  
Low Threshold

AbstractThe realization of ZnO random cavities may be an appropriate approach to fabricate low-cost ZnO laser diodes as there is no stringent requirement in the design of the disordered media provided that they can sustain enough optical gain and feedback within the media to achieve closed-loop random lasing. However, ZnO random lasers suffer from some drawbacks such as relatively higher threshold than conventional lasers, lack of directionality and coherency light emission as well as the difficulty to realize electrically pumped ZnO random lasers. In this paper, a short review on the possibilities to realize low threshold directional electrically pumped ZnO random laser diodes.

Low-Threshold Electrically Pumped Random Lasers

2010 ◽  
Vol 22 (16) ◽  
pp. 1877-1881 ◽  
Author(s):  
Hai Zhu ◽  
Chong-Xin Shan ◽  
Ji-Ying Zhang ◽  
Zhen-Zhong Zhang ◽  
Bing-Hui Li ◽  
...  
Keyword(s):  
Random Lasers ◽  
Electrically Pumped ◽  
Low Threshold

Ultrastable and Low-Threshold Random Lasing from Narrow-Bandwidth-Emission Triangular Carbon Quantum Dots

2018 ◽  
Vol 7 (2) ◽  
pp. 1801202 ◽  
Author(s):  
Fanglong Yuan ◽  
Zifan Xi ◽  
Xiaoyu Shi ◽  
Yunchao Li ◽  
Xiaohong Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Random Lasing ◽  
Narrow Bandwidth ◽  
Low Threshold

Electrically pumped random lasing with an onset voltage of sub-3 V from ZnO-based light-emitting devices featuring nanometer-thick MoO3interlayers

Nanoscale ◽  
2015 ◽  
Vol 7 (20) ◽  
pp. 9164-9168 ◽  
Author(s):  
Can-Xing Wang ◽  
Chun-Yan Lv ◽  
Chen Zhu ◽  
Zhi-Fei Gao ◽  
Dong-Sheng Li ◽  
...  
Keyword(s):  
Random Lasing ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Electrically Pumped ◽  
Onset Voltage

scholarly journals Electrically pumped random lasing from FTO/porous insulator/n-ZnO/p^+-Si devices

2013 ◽  
Vol 21 (9) ◽  
pp. 10483 ◽  
Author(s):  
Yanjun Fang ◽  
Yewu Wang ◽  
Xi Ding ◽  
Ren Lu ◽  
Lin Gu ◽  
...  
Keyword(s):  
Random Lasing ◽  
Electrically Pumped

Electrically pumped ultraviolet random lasing from island-like polycrystalline ZnO film

2018 ◽  
Vol 47 (12) ◽  
pp. 1220002
Author(s):  
刘春阳 Liu Chunyang ◽  
鞠 莹 Ju Ying ◽  
王 帅 Wang Shuai ◽  
母一宁 Mu Yining
Keyword(s):  
Random Lasing ◽  
Zno Film ◽  
Electrically Pumped
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