Low threshold, single-mode laser based on individual CdS nanoribbons in dielectric DBR microcavity

被引：55

作者：

Zhang, Qinglin ^{[1
]}

Wang, Shao-Wei ^{[2
]}

Liu, Xingxing ^{[2
]}

Chen, Tianren ^{[1
]}

Li, Huafen ^{[2
]}

Liang, Junwu ^{[1
]}

Zheng, Weihao ^{[1
]}

Agarwal, Ritesh ^{[3
]}

Lu, Wei ^{[2
]}

Pan, Anlian ^{[1
]}

机构：

[1] Hunan Univ, Key Lab Micronano Phys & Technol Hunan Prov, Key Lab Micro Nano Optoelect Devices, Minist Educ,Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

[3] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

NANO ENERGY | 2016年 / 30卷

关键词：

Single-mode laser; Dielectric DBR; Microcavity; Nanoribbons; COMBINATORIAL ETCHING TECHNIQUE; INTEGRATED FILTER ARRAY; ROOM-TEMPERATURE; NANOWIRE LASERS; SEMICONDUCTOR NANOWIRES; CADMIUM-SULFIDE; WAVE-GUIDES; NANOBELTS; EMISSION; CIRCUITS;

D O I：

10.1016/j.nanoen.2016.10.045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single-mode lasers with low threshold are attractive for their potential applications in many areas, such as optical communication, signal processing and displays. Here we report a nanoscale single-mode laser with CdS nanoribbons (NRs) sandwiched between two dielectric distributed Bragg reflectors (DBRs). Under optical pumping, the band edge emission of CdS ribbons can be effectively confined and give lasing in the DBR microcavity, with the lasing threshold as low as similar to 8 mu J/cm(2), which is one order lower than those of bare CdS ribbons for comparison. More importantly, the CdS-DBR laser can realize single-mode emission, for the length of the resonance cavity can support a mode spacing larger than the bandwidth of the optical gain. Light polarization measurements demonstrate the single-mode lasing has a polarization degree as high as 97.4%. Time-resolved photoluminescence (TRPL) measurements further reveal that the lasing action comes from the electron-hole plasma recombination process. Moreover, the wavelength of the lasing mode can be broadly tuned by changing the thickness of CdS NRs. This low-threshold single-mode laser may find applications in highly integrated photonics devices and systems.

引用

页码：481 / 487

页数：7

共 59 条

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