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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.
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[1] 王海玲, 王霆, 张建军 2019 物理学报 68 117301
Google Scholar
Wang H L, Wang T, Zhang J J 2019 Acta Phys. Sin. 68 117301
Google Scholar
[2] OzakiN, Ikuno D 2022 J. Cryst. Growth 588 126657
Google 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 035103
Google Scholar
[4] 王霆, 张建军, 刘会赟 2015 物理学报 64 204209
Google Scholar
Wang T, Zhang J J, Liu H Y 2015 Acta Phys. Sin. 64 204209
Google 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 14 388
Google 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 151572
Google 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 5738
Google Scholar
Tian P, Huang L R, Fei S P, Yu Y, Pan B, Xu W, Huang D X 2010 Acta Phys. Sin. 59 5738
Google 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 1
Google 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 1129
Google Scholar
[12] Coleman J J, Young J D, Garg A 2011 J. Lightwave Technol. 29 499
Google Scholar
[13] Sugawara M, Usami M 2009 Nat. Photonics 3 30
Google Scholar
[14] Yamaguchi K, Yujobo K, Kaizu T 2000 Jpn. J. Appl. Phys. 39 L1245
Google Scholar
[15] Leonard D, Krishnamurthy M, Reaves C M, Denbaars S P, Petroff P M 1993 Appl. Phys. Lett. 63 3203
Google Scholar
[16] Yang J, Tang M, Chen S, Liu H Y 2023 Light. Sci. Appl. 12 16
Google 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 073003
Google Scholar
[18] Zhou Z, Ou X, Fang Y, Alkhazraji E, Xu R, Wan Y, Bowers J E 2023 eLight 3 1
Google Scholar
[19] Liang D, Srinivasan S, Descos A, Zhang C, Kurczveil G, Huang Z, Beausoleil R 2021 Optica 8 591
Google 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 2704
Google 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 094204
Google Scholar
[23] Kumar R, Saha J, Tongbram B, Panda D, Gourishetty R, Kumar R, Gazi S A, Chakrabarti S 2023 Curr. Appl. Phys. 47 72
Google Scholar
[24] Pötschke K, Müller-Kirsch L, Heitz R, Sellin R L, Pohl U W, Bimberg D, Zakharov N, Werner P 2004 Physica E 21 606
Google 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 45051
Google 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 5164
Google Scholar
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