Báo cáo sinh học: A high-performance quantum-dot superluminescent diode with two-section structure

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A high-performance quantum-dot superluminescent diode with two-section structure
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Báo cáo sinh học: " A high-performance quantum-dot superluminescent diode with two-section structure"Nanoscale Research Letters This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. A high-performance quantum-dot superluminescent diode with two-section structure Nanoscale Research Letters 2011, 6:625 doi:10.1186/1556-276X-6-625 Xinkun Li (phylxk@semi.ac.cn) Peng Jiu (pengjin@semi.ac.cn) Qi An (anqi@semi.ac.cn) Zuocai Wang (pkufish@semi.ac.cn) Xueqin Lv (xqlv@semi.ac.cn) Heng Wei (weiheng@semi.ac.cn) Jian Wu (wujian@semi.ac.cn) Ju Wu (wuju@semi.ac.cn) Zhanguo Wang (zgwang@semi.ac.cn) ISSN 1556-276X Article type Nano Express Submission date 8 September 2011 Acceptance date 12 December 2011 Publication date 12 December 2011 Article URL http://www.nanoscalereslett.com/content/6/1/625 This peer-reviewed article was published immediately upon acceptance. It can be downloaded, printed and distributed freely for any purposes (see copyright notice below). Articles in Nanoscale Research Letters are listed in PubMed and archived at PubMed Central. For information about publishing your research in Nanoscale Research Letters go to http://www.nanoscalereslett.com/authors/instructions/ For information about other SpringerOpen publications go to http://www.springeropen.com © 2011 Li et al. ; licensee Springer.This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.A high-performance quantum dot superluminescent diode with a two-sectionstructureXinkun Li1, Peng Jin*1, Qi An1, Zuocai Wang1, Xueqin Lv1, Heng Wei1, Jian Wu1, JuWu1, and Zhanguo Wang11 Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors,Chinese Academy of Sciences, Beijing, 100083, China*Corresponding author: pengjin@semi.ac.cnEmail addresses:XL: phylxk@semi.ac.cnPJ: pengjin@semi.ac.cnQA: anqi@semi.ac.cnZW: pkufish@semi.ac.cnXL: xqlv@semi.ac.cnHW: weiheng@semi.ac.cnJW: wujian@semi.ac.cnJW: wuju@semi.ac.cnZW: zgwang@semi.ac.cnAbstractBased on InAs/GaAs quantum dots [QDs], a high-power and broadbandsuperluminescent diode [SLD] is achieved by monolithically integrating aconventional SLD with a semiconductor optical amplifier. The two-section QD-SLDdevice exhibits a high output power above 500 mW with a broad emission spectrumof 86 nm. By properly controlling the current injection in the two sections of theQD-SLD device, the output power of the SLD can be tuned over a wide range from200 to 500 mW while preserving a broad emission spectrum based on the balancebetween the ground state emission and the first excited state emission of QDs. Thegain process of the two-section QD-SLD with different pumping levels in the twosections is investigated.Keywords: quantum dot; superluminescent diode; two-section structure; opticalamplification.IntroductionSuperluminescent diodes [SLDs] have attracted extensive attention for a wide rangeof applications, such as optical coherence tomography [OCT] [1, 2], opticalfiber-based sensors [3-5], external cavity tunable lasers [6-8], optoelectronic systems[9], etc. A wide emission spectrum corresponding to a low degree of coherence isrequired for these applications of SLD, which allows the realization of sensors withimproved resolution. It has been proposed that self-assembled quantum dots [QDs][10-12] and quantum well grown on a high-index surface are beneficial to broaden thespectral bandwidth of the device [13]. Till now, QDs have successfully been used asthe active media in several broadband light-emitting devices, such as QD-SLDs[14-20], QD semiconductor optical amplifiers [SOAs] [21-23], and Q ...