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利用InAs/GaAs数字合金超晶格改进InAs量子点有源区的结构设计

杜安天 刘若涛 曹春芳 韩实现 王海龙 龚谦

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利用InAs/GaAs数字合金超晶格改进InAs量子点有源区的结构设计

杜安天, 刘若涛, 曹春芳, 韩实现, 王海龙, 龚谦

Improving structure design of active region of InAs quantum dots by using InAs/GaAs digital alloy superlattice

Du An-Tian, Liu Ruo-Tao, Cao Chun-Fang, Han Shi-Xian, Wang Hai-Long, Gong Qian
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  • 利用分子束外延技术, 通过InAs/GaAs数字合金超晶格代替传统的直接生长InGaAs层的方式, 在GaAs(100)衬底上生长了InAs量子点结构并成功制备了1.3 μm InAs量子点激光器. 通过原子力显微镜和光致荧光谱测试手段, 对传统生长模式和数字合金超晶格生长模式的两种样品进行了表征, 研究发现采用32周期InAs/GaAs数字合金超晶格样品的量子点密度非常高, 发光性能良好. 通过与常规生长方式所制备激光器的性能对比, 发现采用InAs/GaAs数字合金超晶格生长InAs量子点的有源区也可以得到高质量的激光器. 利用该方式生长的InAs量子点激光器的阈值电流为24 mA, 相应的阈值电流密度仅为75 A/cm2, 最高工作温度达到120 ℃. InAs/GaAs数字合金超晶格既可以保证生长过程中源炉的温度保持不变, 还可以对InGaAs层的组分实现灵活调控. 不需要改变生长速度, 通过改变InAs/GaAs数字合金超晶格的周期数以及InAs层和GaAs层的厚度, 便可以获得任意组分的InGaAs, 从而得到不同发光波长的激光器. 这种生长方式对量子点有源区的结构设计和外延生长提供了新思路.
    A 1.3-μm InAs quantum dot laser has been successfully fabricated on a GaAs(100) substrate by molecular beam epitaxy (MBE) technique through using InAs/GaAs digital alloy superlattices instead of the conventional InGaAs layer. The samples grown by conventional growth method and the digital alloy superlattice growth method are characterized by atomic force microscope (AFM) and photoluminescence (PL) spectroscopy. It is found that 8-period sample possesses a low quantum dot density and poor luminescence performance. With the increase of the number of growth periods, the quantum dot density of the sample increases and the luminous performance improves. This indicates that the quality of the grown sample improves with the increase of InAs/GaAs period of the InGaAs layer. When the total InAs/GaAs period is 32, the quantum dot density of the sample is high and the luminescence performance is good. After the experimental measurement, the sample DAL-0 fabricated by conventional growth method and the sample DAL-32 (32-periods InAs/GaAs digital alloy superlattices) are utilized to fabricate quantum dot laser by standard process. The performances of two types of quantum dot lasers obtained with different growth methods are characterized. It is found that the InAs quantum dot lasers fabricated by the sample grown by digital alloy superlattice method have good performances. Under continuous wave operation mode, the threshold current is 24 mA corresponding to a threshold current density of 75 A/cm2. The highest operation-temperature reaches 120 ℃. In addition, InAs quantum dot laser using digital alloy superlattice has good temperature stability. Its characteristic temperature is 55.4 K. Compared with the traditional laser, the InAs quantum dot laser grown by InAs/GaAs digital alloy superlattice has good performance in terms of threshold current density, output power and temperature stability, which indicates that high-quality laser can be obtained by this growth method. Using the InAs/GaAs digital alloy superlattice growth method, the InGaAs composition can be changed without changing the temperature of the source oven. Thus InAs quantum dot lasers with different luminescence wavelengths can be obtained through this growth method. The InAs/GaAs digital alloy superlattice structure can be used to realize different averaging of In content in the growth structure. The method provides a new idea for designing and growing the active region of quantum dot laser.
      通信作者: 王海龙, hlwang@qfnu.edu.cn ; 龚谦, qgong@mail.sim.ac.cn
    • 基金项目: 国家自然科学基金(批准号: 61674096)资助的课题.
      Corresponding author: Wang Hai-Long, hlwang@qfnu.edu.cn ; Gong Qian, qgong@mail.sim.ac.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 61674096).
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    Alexander R R, Childs D T D, Agarwal H, Groom K M, Liu H Y, Hopkinson M, Hogg R A, Ishida M, Yamamoto T, Sugawara M, Arakawa Y, Badcock T J, Royce R J, Mowbray D J 2007 IEEE J. Quantum Elect. 43 1129Google Scholar

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    Xu B, Wang G, Du Y, Miao Y, Li B, Zhao X, Lin H, Yu J, Su J, Dong Y, Ye T, Radamson H H 2022 Nanomaterials 12 2704Google Scholar

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    Pötschke K, Müller-Kirsch L, Heitz R, Sellin R L, Pohl U W, Bimberg D, Zakharov N, Werner P 2004 Physica E 21 606Google Scholar

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  • 图 1  GaAs基InAs量子点激光器结构示意图

    Fig. 1.  Schematic diagram of GaAs based InAs quantum dot laser structure.

    图 2  GaAs基InAs量子点激光器截面SEM图

    Fig. 2.  Cross section SEM of InAs quantum dot laser on GaAs.

    图 3  InAs量子点2 µm×2 µm的AFM图像 (a) DAL-8; (b) DAL-16; (c) DAL-32; (d) DAL-0

    Fig. 3.  AFM images of InAs quantum dots 2 µm×2 µm: (a) DAL-8; (b) DAL-16; (c) DAL-32; (d) DAL-0.

    图 4  不同生长方式的InAs量子点的PL光谱

    Fig. 4.  PL spectra of InAs quantum dots with different growth methods.

    图 5  连续工作模式下两种InAs量子点激光器的I-V-P特性曲线 (a) DAL-0; (b) DAL-32

    Fig. 5.  I-V-P characteristic curves of two InAs quantum dots lasers in CW mode: (a) DAL-0; (b) DAL-32.

    图 6  温度20 ℃、注入电流250 mA时, 两种InAs量子点激光器的发射光谱

    Fig. 6.  Emission spectra of two InAs quantum dots lasers at the temperature of 20 ℃ and injection current of 250 mA.

    图 7  两种InAs量子点激光器特征温度的变化曲线

    Fig. 7.  Characteristic temperature curves of two InAs quantum dots lasers.

  • [1]

    王海玲, 王霆, 张建军 2019 物理学报 68 117301Google Scholar

    Wang H L, Wang T, Zhang J J 2019 Acta Phys. Sin. 68 117301Google Scholar

    [2]

    OzakiN, Ikuno D 2022 J. Cryst. Growth 588 126657Google Scholar

    [3]

    Yang J, Liu Z, Jurczak P, Tang M, Li K, Pan S, Sanchez A, Beanland R, Zhang Z C, Wang H 2021 J. Phys. D Appl. Phys. 54 035103Google Scholar

    [4]

    王霆, 张建军, 刘会赟 2015 物理学报 64 204209Google Scholar

    Wang T, Zhang J J, Liu H Y 2015 Acta Phys. Sin. 64 204209Google Scholar

    [5]

    Wang Z, Qi W, Feng Q, Wang T, Zhang J 2021 Opt. Express 29 674

    [6]

    Bimberg D, Pohl U W 2011 Mater. Today 14 388Google Scholar

    [7]

    Ruiz-Marín N, Reyes D F, Stanojević L, BenT, Braza V, Gallego-Carro A, Bárcena-González G, Ulloa J M, González D 2022 Appl. Surf. Sci. 573 151572Google Scholar

    [8]

    田芃, 黄黎蓉, 费淑萍, 余奕, 潘彬, 徐巍, 黄德修 2010 物理学报 59 5738Google Scholar

    Tian P, Huang L R, Fei S P, Yu Y, Pan B, Xu W, Huang D X 2010 Acta Phys. Sin. 59 5738Google Scholar

    [9]

    Norman J C, Jung D, Zhang Z, Wan Y, Liu S, Shang C, Herrick R W, Chow W W, Gossard A C, Bowers J E 2019 IEEE J. Quantum Elect. 55 1Google Scholar

    [10]

    Arsenijević D, Bimberg D 2017 Green Photonics and Electronics (Cham, Switzerland: Springer International Publishing) pp75–106

    [11]

    Alexander R R, Childs D T D, Agarwal H, Groom K M, Liu H Y, Hopkinson M, Hogg R A, Ishida M, Yamamoto T, Sugawara M, Arakawa Y, Badcock T J, Royce R J, Mowbray D J 2007 IEEE J. Quantum Elect. 43 1129Google Scholar

    [12]

    Coleman J J, Young J D, Garg A 2011 J. Lightwave Technol. 29 499Google Scholar

    [13]

    Sugawara M, Usami M 2009 Nat. Photonics 3 30Google Scholar

    [14]

    Yamaguchi K, Yujobo K, Kaizu T 2000 Jpn. J. Appl. Phys. 39 L1245Google Scholar

    [15]

    Leonard D, Krishnamurthy M, Reaves C M, Denbaars S P, Petroff P M 1993 Appl. Phys. Lett. 63 3203Google Scholar

    [16]

    Yang J, Tang M, Chen S, Liu H Y 2023 Light. Sci. Appl. 12 16Google Scholar

    [17]

    Thomson D, Zilkie A, Bowers J E, Komljenovic T, Reed G T, Vivien L, Marris-Morini D, Cassan E, Virot L, Fédéli J M, Hartmann J M, Schmid J H, Xu D X, Boeuf F, O’Brien P, Mashanovich G Z, Nedeljkovic M 2016 J. Optics 18 073003Google Scholar

    [18]

    Zhou Z, Ou X, Fang Y, Alkhazraji E, Xu R, Wan Y, Bowers J E 2023 eLight 3 1Google Scholar

    [19]

    Liang D, Srinivasan S, Descos A, Zhang C, Kurczveil G, Huang Z, Beausoleil R 2021 Optica 8 591Google Scholar

    [20]

    Xu B, Wang G, Du Y, Miao Y, Li B, Zhao X, Lin H, Yu J, Su J, Dong Y, Ye T, Radamson H H 2022 Nanomaterials 12 2704Google Scholar

    [21]

    Tatebayashi J, Nishioka M, Arakawa Y 2002 J. Cryst. Growth 237 1296

    [22]

    ZhangY, Yang C A, Shang J M, Chen Y, Niu Z 2021 Chin. Phys. B 30 094204Google Scholar

    [23]

    Kumar R, Saha J, Tongbram B, Panda D, Gourishetty R, Kumar R, Gazi S A, Chakrabarti S 2023 Curr. Appl. Phys. 47 72Google Scholar

    [24]

    Pötschke K, Müller-Kirsch L, Heitz R, Sellin R L, Pohl U W, Bimberg D, Zakharov N, Werner P 2004 Physica E 21 606Google Scholar

    [25]

    Kim Y, Chu R J, Ryu G, Woo S, Lung Q N D, Ahn D H, Han J H, Choi W J, Jung D 2022 ACS Appl. Mater. Interfaces 14 45051Google Scholar

    [26]

    Fathpour S, Mi Z, Bhattacharya P, Kovsh A R, Mikhrin S S, Krestnikov I L, Kozhukhov A V, Ledentsov N N 2004 Appl. Phys. Lett. 85 5164Google Scholar

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出版历程
  • 收稿日期:  2023-02-23
  • 修回日期:  2023-03-27
  • 上网日期:  2023-04-15
  • 刊出日期:  2023-06-20

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