Multi‐Wavelength Laser Emission by Hot‐Carriers Transfers in Perovskite‐Graphene‐Chalcogenide Quantum Dots

Pan, Yong; Wang, Li; Zhang, Yan; Su, Xueqiong; Gao, Dongwen; Chen, Ruixiang; Huang, L.; Sun, Wei; Zhao, Yunfei; Gao, Dangli

doi:10.1002/adom.202201044

Cited by 10 publications

(7 citation statements)

References 64 publications

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“…The array unit's nonuniformity allows multiple pump light beams to hit a single region, resulting in a notable improvement. [24] The absorption range has been expanded: The second factor that lowers the threshold can be attributed to the array cavity. Providing the different cavity length and gain environment is the role of the array cavity.…”

Section: Resultsmentioning

confidence: 99%

Threshold Reducing via Micro Rhombic Lasing Misalignment Step‐Cavity with a Simple and Universal Use

Pan,

Zhang,

Cao

et al. 2023

Advanced Optical Materials

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Nanolasers with low‐threshold operation have been attracting attention for a long time. However, research on methods to lower thresholds has been stagnant and underreported. To provide a generalizable method for reducing thresholds, a stepped array cavity designed in this study is demonstrated to reduce the nanolaser excitation threshold. In the experiment, the rhomboid array cavity is fabricated by 3D printing and covered with Cu film. The mechanism of two cavity (cavity α and β) and five modes is designed and displayed for systematically illustrating the parameters of the different cavities and principles of the different oscillation modes. The lasing behavior of modes 1, 2, 4, and 5 is proved by the photoluminescence spectrum at room temperature with the threshold of 1.53 kW cm−2, 2.73 kW cm−2, 66.2 W cm−2, and 371 W cm−2. The optimum angle of incidence for obtaining lower thresholds in the range 40°–60° is suggested. The laser generation mechanism and polarization characteristics are provided. Finally, the method developed in this study uses a wide range of materials and gain modes to achieve a universal threshold reduction method. The results indicate that the designed method is effective and scalable for a wide range of typical materials and gain modes.

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Section: Resultsmentioning

confidence: 99%

Threshold Reducing via Micro Rhombic Lasing Misalignment Step‐Cavity with a Simple and Universal Use

Pan,

Zhang,

Cao

et al. 2023

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The details of PL can be seen in the figure S2. The details process of TA measurement was same to our previous work [12]. The KEITHLEY 2400 current source is used for testing and injection simultaneously.…”

Section: Characterizationmentioning

confidence: 99%

The hot-e lasers based on electron transfer enhanced by electric polarization under photo-electric co-excitation in perovskite and metal

Pan

Gao

Zhao

et al. 2023

Preprint

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The hot electron transfer resulting fluorescence enhancement has the significant meaningful for theory and experiment of photoelectric devices studying. However, the laser emission based on hot electron transfer directly is difficult to realize because of the low transfer efficiency. To achieve laser with new generation mechanism base on hot-electron transfer, the photo-electric co-excitation are proposed for improving the efficiency of hot electron transfer. The lasing behavior at 532 nm are realized with a threshold of 5 kw cm-2&1 μA, which can be considered as the hot e transfer lasing. For details, number of hot electrons transfer process were described via transient absorption spectrum according to the improved ground state bleaching and excited state absorption signal in device ON. Through comparing to optical pump only, the quantum efficiencies of hot electron generation (HEG) and hot electron transfer (HET) were increased by this method about 31% and 31% (about 2.2 and 3.5 times), respectively. Efficient hot electron transferring from the charge regulation of metals by adding an electric field was confirmed. Most importantly, a triple gain mode coupling device including local surface plasmon, hot-e transfer and array oscillation was presented in experiment and simulation. This study can provide theoretical and experimental reference for the research of hot electron lasers and device.

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“…The details of PL can be seen in the gure S2. The details process of TA measurement was same to our previous work [12].…”

Section: Characterizationmentioning

confidence: 99%

The hot-e lasers based on effectively electron transfer enhanced by electric polarization in perovskite and metal

Pan

Zhang

Zhao

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

The hot electron transfer resulting fluorescence enhancement has the significant meaningful for theory and experiment of photoelectric devices studying. However, the laser emission based on hot electron transfer directly is difficult to realize because of the low transfer efficiency. To achieve laser with new generation mechanism base on hot-electron transfer, the optical + electrical excitation simultaneously are proposed for improving the efficiency of hot electron transfer. The lasing behavior at 532 nm are realized with a threshold of 5 kw cm− 2&1 µA, which can be considered as the hot e transfer lasing. For details, number of hot electrons transfer process were described via transient absorption spectrum according to the improved ground state bleaching and excited state absorption signal in device ON. Through comparing to optical pump only, the quantum efficiencies of hot electron generation (HEG) and hot electron transfer (HET) were increased by this method about 31% and 31% (about 2.2 and 3.5 times), respectively. Efficient hot electron transferring from the charge regulation of metals by adding an electric field was confirmed. Most importantly, a triple gain mode coupling device including local surface plasmon, hot-e transfer and whispering gallery mode was presented in experiment and simulation. This study can provide theoretical and experimental reference for the research of hot electron lasers and device.

show abstract

Multi‐Wavelength Laser Emission by Hot‐Carriers Transfers in Perovskite‐Graphene‐Chalcogenide Quantum Dots

Cited by 10 publications

References 64 publications

Threshold Reducing via Micro Rhombic Lasing Misalignment Step‐Cavity with a Simple and Universal Use

Threshold Reducing via Micro Rhombic Lasing Misalignment Step‐Cavity with a Simple and Universal Use

The hot-e lasers based on electron transfer enhanced by electric polarization under photo-electric co-excitation in perovskite and metal

The hot-e lasers based on effectively electron transfer enhanced by electric polarization in perovskite and metal

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