Ultralow Threshold Lasing from Carbon Dot-Ormosil Gel Hybrid-Based Planar Microcavity

Yiqun Ni; Zhixia Han; Junkai Ren; Zhen Wang; Wenfei Zhang; Zheng Xie; Yonghong Shao; Shuyun Zhou

doi:10.3390/nano11071762

Ultralow Threshold Lasing from Carbon Dot-Ormosil Gel Hybrid-Based Planar Microcavity

Nanomaterials (Basel). 2021 Jul 6;11(7):1762. doi: 10.3390/nano11071762.

Authors

Yiqun Ni¹, Zhixia Han^{2

3}, Junkai Ren^{2

3}, Zhen Wang^{2

3}, Wenfei Zhang^{1

4}, Zheng Xie², Yonghong Shao¹, Shuyun Zhou^{2

3}

Affiliations

¹ Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
² Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
³ University of Chinese Academy of Sciences, Beijing 100049, China.
⁴ Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

Abstract

The absence of an ideal solid matrix with resistance to harsh conditions for carbon dots (CDs) and high transmittance in the visible/near infrared region is the bottleneck in CD applications. In this study, we show that a stable rigid structure can be formed between CDs and organically modified silicates (ormosil) gel when CDs are incorporated into ormosil gel hybrids as a solid matrix. A high photoluminescence quantum yield (PLQY) of 63% is achieved at a 583 nm emission. Peak optical gain of the hybrids was found to be 67 cm^-1 at peak wavelength. Ultralow threshold (~70 W/cm²) lasing can also be demonstrated from a planar microcavity by using CD-ormosil gel hybrids as a gain medium.

Keywords: carbon dots; ormosil gel hybrids; planar microcavity; ultralow threshold lasing.

Abstract

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