Hong, Yanhua

Lee, Min Wong

Masoller, Cristina

English

Bangor University Research Portal

   PRIFYSGOL BANGOR / BANGOR UNIVERSITY  Preface for Special Issue: Advancements in Semiconductor LasersHong, Yanhua; Masoller, Cristina; Lee, Min WongPhotonicsAccepted/In press: 16/08/2023Peer reviewed versionCyswllt i'r cyhoeddiad / Link to publicationDyfyniad o'r fersiwn a gyhoeddwyd / Citation for published version (APA):Hong, Y., Masoller, C., & Lee, M. W. (Accepted/In press). Preface for Special Issue:Advancements in Semiconductor Lasers. 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Aug. 2023     Photonics 2022, 9, x. https://doi.org/10.3390/xxxxx www.mdpi.com/journal/photonics Editorial 1 Preface for Special Issue: Advancements in Semiconductor La- 2 sers 3 Yanhua Hong 1,*, Cristina Masoller 2 and Min Won Lee 3 4 1 School of Computer Science and Engineer, Bangor University, Bangor LL57 1UT, UK 5 2 Physics Department, Universitat Politecnica de Catalunya, Rambla St. Nebridi 22, 08222 Terrassa, Spain; 6 cristina.masoller@upc.edu 7 3 Laboratoire de Physique des Lasers (UMR CNRS 7538), Université Sorbonne Paris Nord 93430 Villetaneuse, 8 France; min.lee@univ-paris13.fr 9 * Correspondence: y.hong@bangor.ac.uk 10  11 We are delighted to present this special issue of "Advancement of Semiconductor Lasers," 12 which features a remarkable collection of 14 papers that explore the diverse and cutting- 13 edge aspects of semiconductor lasers. This collection brings together the latest research 14 and innovations in the field, covering topics ranging from new techniques for understand- 15 ing laser dynamics to devices design and fabrication, investigation of laser dynamics and 16 their applications, and the characterization of compounded semiconductor materials. 17 Semiconductor lasers have revolutionized various industries, enabling critical advance- 18 ments in telecommunications, data communication, sensing, and imaging applications. 19 With a continuous pursuit of higher performance and novel functionalities, the field of 20 semiconductor lasers has witnessed remarkable progress over the years. This special issue 21 showcases some of the most exciting developments and discoveries from leading re- 22 searchers around the world. 23 The first section of this issue presents advancement in understanding the underlying de- 24 terminism of semiconductor lasers, and a new method to distinguish chaotic regimes in a 25 semiconductor laser with feedback. Lenstra et al. offer physical insight into the noise-trig- 26 gered spiking mechanism in a two-section semiconductor laser under excitable and noisy 27 conditions, with potential implications for studying stochastic spiking in biological neu- 28 rons [1]. Nguyen at al. develop Temporal And Reversible DYnamical Symmetry (TAR- 29 DYS) quantifiers, providing a powerful tool for characterizing chaotic regimes in other 30 complex dynamical systems [2]. 31 The second section of this issue presents four papers dedicated to the exploration of new 32 types of semiconductor lasers and devices. Among these, Panajovtov et al. introduce a 33 groundbreaking spin-VCSEL, which embeds a nematic liquid crystal in a second cavity, 34 achieving an astonishing small signal modulation response of several hundreds of GHz 35 [3]. This advancement represents a significant breakthrough, outperforming conventional 36 VCSELs by more than 10 times. Sun at al. focus on the design and fabrication of a trench 37 mode-modulation based edge-emitting laser operating at 650nm [4]. This device not only 38 demonstrates superior beam quality but also maintains high power output. Moreover, 39 Liu et al. reports the successful fabrication of a 792nm semiconductor laser with an im- 40 pressive output power of 232 W and an electro-optic conversion efficiency of 48.6% [5]. 41 Such high-power lasers hold great promise for various industrial and scientific applica- 42 tions. In another significant contribution, a monolithically integrated multi-section 43 Citation: Lastname, F.; Lastname, F.; Lastname, F. Title. Photonics 2022, 9, x. https://doi.org/10.3390/xxxxx Received: date Accepted: date Published: date Publisher’s Note: MDPI stays neu-tral with regard to jurisdictional claims in published maps and institu-tional affiliations.  Copyright: © 2022 by the authors. Submitted for possible open access publication under the terms and con-ditions of the Creative Commons At-tribution (CC BY) license (https://cre-ativecommons.org/licenses/by/4.0/). Photonics 2022, 9, x FOR PEER REVIEW 2 of 3   semiconductor laser is introduced, showcasing enhanced security with 248 key spaces and 44 a data rate of 2.5 Gb/s [6]. 45 Further expanding on the study of nonlinear dynamics of semiconductor lasers and their 46 applications, Zhao et al. experimentally investigates the nonlinear dynamics of an inter- 47 band cascade laser under variable-aperture optical feedback, revealing various dynamical 48 states [7]. Additionally, the mode configuration of an excited-state quantum dot laser (ES- 49 QDL) under concave mirror optical feedback, demonstrating selective excitation of longi- 50 tudinal modes is explored [8]. Bian et al. proposes a simple method using mutually cou- 51 pled free-running VCSELs to generate broadband polarization chaos [9], while the locking 52 map of a semiconductor laser under the injection of a frequency comb is studied [10]. 53 Moreover, a new technique using feedback-delay signatures of a modulated semiconduc- 54 tor laser for fiber fault detection is introduced to enhance detection sensitivity [11]. The 55 effect of VCSEL temperature on the quality of random number generation is explored [12], 56 and the potential of generating high-quality photonic microwave signals in solitary QD 57 spin-VCSELs with optical feedback is demonstrated [13]. 58 Finally, Mikhailov et al. delve into the characterization of compound semiconductor ma- 59 terials [14], specifically the interband electron transition energy in multiple Hg1- 60 xCdxTe/Hg1-yCdyTe quantum wells (MQWs) at room temperature. 61 The fascinating array of topics covered in this special issue highlights the vibrancy and 62 dynamism of the field of semiconductor lasers. We would like to thank all the authors 63 who submitted their exceptional work to this Special Issue. Additionally, we would like 64 to extend our appreciation to the reviewers for their outstanding efforts in evaluating the 65 manuscripts and offering valuable feedback. We would also like to acknowledge Photon- 66 ics for initiating this special Issue, especially, the managing editor Zane Lin for her prep- 67 aration, editing, and managing of this Special Issue. 68 We hope this special issue will inspire further exploration and collaboration in the ad- 69 vancement of semiconductor laser technology, fostering continued progress and innova- 70 tion in the years to come. 71 Conflicts of Interest: The authors declare no conflict of interest. 72   73 Photonics 2022, 9, x FOR PEER REVIEW 3 of 3   References 74  75 1. Lenstra, D.; Puts, L.; Yao, W. M. First-passage-time analysis of the pulse-timing statistics in a two-section semiconductor 76 laser under excitable and noisy conditions. Photonics 2022, 9, 860.  77 2. Nguyen, N. V.; Pattanayak, A. K. Aragoneses A. TARDYS quantifiers: extracting temporal and reversible dynamical sym- 78 metries. Photonics 2022, 9, 938.  79 3. Panajovtov, K.; Petrov, M.; Marinov, T. Liquid-crystal spin-VCSEL with electro-optically controllable birefringence. Pho- 80 tonics 2023, 9, 179.  81 4. Sun, X.; Liu, P.; Ma, X. G.; Zhang, X. D.; Su, J.; Chen, K.; Liu Q.; Jiang, K.; Tang, W. J.; Xia, W.; Xu, X. G. Mode-modulation 82 structure based on 650 nm ridge waveguide edge-emitting laser. Photonics 2023, 10, 302.  83 5. Liu, P.; Sun, W. G.; Sun, X.; Zhu, Z.; Qin, H. B.; Su, J.; Liu, C. C.; Tang, W. J.; Jiang, K.; Xia, W.; Xu, X. G. High–power 792 84 nm fiber–coupled semiconductor laser. Photonics 2022, 9, 619.  85 6. Zhang, F. F.; Wang, Y. C.; Sun, Y. H.; Xu, J. P.; Li, P.; Wang, A. B.; Q. Y. W. Key space enhancement in chaotic secure 86 communication utilizing monolithically integrated multi-section semiconductor lasers. Photonics 2023, 10, 213.  87 7. Zhao, M. R.; Xia, G. X.; Yang, K.; Liu, S. M.; Liu, J. Q.; Wang, Q. P.; Liu, J. L.; Wu. Z. M. Nonlinear dynamics of mid-infrared 88 interband cascade lasers subject to variable-aperture optical feedback, Photonics 2022, 9, 410.  89 8. Zheng, Y. F.; Xia, G. X.; Lin, X. D.; Wang, Q. Q.; Wang, H. P.; Jiang, C.; Chen, H. M.; Wu. Z. M. Experimental investigation 90 on the mode characteristics of an excited-state quantum dot laser under concave mirror optical feedback. Photonics 2023, 91 10, 166.  92 9. Bian, H. F.; Zhang, X. M,; Li; P.; Jia, Z. W.; Li, M.; Xu’ B. J.; Shore, K. A.; Qin, Y. W.; Wang, Y. C. Sub-40 GHz broadband 93 polarization chaos generation using mutually coupled free-running VCSELs. Photonics 2023, 10, 219.  94 10. Al-Hosiny N. M. Dynamics of the frequency shifts in semiconductor lasers under the injection of a frequency comb. Pho- 95 tonics 2022, 9, 886.  96 11. Shi, Z. X.; Zhao, T.; Wang, Y. C.; Wang, A. B. High-sensitivity fiber fault detection method using feedback-delay signature 97 of a modulated semiconductor laser. Photonics 2022, 9, 454.  98 12. Rivero, I.; del Pozo, A. L.; Valle-Miñón, M.; Quirce, A.; Valle, A. Measurement of the temperature dependence of polariza- 99 tion switching in gain-switched VCSELs for quantum random number generation. Photonics 2023, 10, 474.  100 13. Shen, Z. Y.; Huang, Y.; Zhu, X.; Zhou, P.; Mu, P. H.; Li, N. Q. Broad tunable and high-purity photonic microwave generation 101 based on an optically pumped QD spin-VCSEL with optical feedback. Photonics 2023, 10, 326.  102 14. Mikhailov, N. N.; Dvoretsky, S. A.; Remesnik, V. G.; Uzhakov, I. N.; Shvets, V. A.; Aleshkin, V. Y. Interband electron tran- 103 sitions energy in multiple HgCdTe quantum wells at room temperature. Photonics 2023, 10, 430.  104  105 

Preface for Special Issue: Advancements in Semiconductor Lasers

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Preface for Special Issue: Advancements in Semiconductor Lasers

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