Conference Presentations

3.    Tianshu Li. Unveiling the role of short–range order in GeSn alloy. 3rd AFRL Workshop on
GeSn and GeSiSn, Virtual, September 2020. (Fully supported by MURI).

2.    Jifeng Liu. Towards High Stability, High–Sn Composition GeSn Mid–Infrared and α–Sn(Ge)
Quantum Materials. 2020 IEEE Summer Topical Meeting, July 2020 (Invited talk). (Partially
supported by MURI).

1.    Tianshu Li. Large–scale first principle computational modeling of GeSn alloys. Conference on
Lasers and Electro–optics, Virtual, May 2020 (Invited talk) (Fully supported by MURI).

7.    Shang Liu, Alejandra Cuervo Covian, Cory Cline, Xiaoxin Wang, and Jifeng Liu. High–fidelity
retrieval of nanoscale short–range order distribution in GeSn alloys guided by statistical methods.
2021 Materials Research Society Fall Meeting, Paper CH04.07.04

6.    Shang Liu, Alejandra Cuervo Covian, Xiaoxin Wang, and Jifeng Liu. Reversed Phase
Transformation of α→β–Sn at Elevated Temperatures towards Quantum Material Integration on
Silicon. 2021 Materials Research Society Fall Meeting, Paper EQ18.03.05

5.    Tianshu Li. Complex structures of Si–Ge–Sn alloys. 4th AFRL Workshop on GeSn and
GeSiSn, Virtual, September 2021. (Fully supported by MURI)

4.    T. McCarthy, Z. Ju, S. Schaefer, S.–Q. Yu, and Y.–H. Zhang. Momentum (k)–Space Charge–
Separation Infrared Photodetectors Using SiGeSn Alloys. IEEE Summer Topical conference
presentation, July 19–21st 2021.

16.    T. McCarthy, Z. Ju, R. Basnet, A. McMinn, J. Hu, S.–Q. Yu, and Y.–H. Zhang. α–Sn and Sn1–
xGex Thin Films Grown on CdTe/InSb(100) Substrate. 22nd International Conference on
Molecular Beam Epitaxy (ICMBE 2022) conference presentation – September 4–9th 2022.

15.    Shui–Qing Yu, Gregory Salamo, Wei Du, Baohua Li, Greg Sun, Richard A. Soref, Yong–
Hang Zhang, and Guo–En Chang. SiGeSn Technology for All–Group–IV Photonics. 80th Device
Research Conference (DRC 2022). June 26–29 (2022).

14.    T. McCarthy, Z. Ju, S. Schaefer, X. Qi, A. McMinn, S.–Q. Yu, and Y.–H. Zhang. Molecular
Beam Epitaxy Grown Group–IV Alloys: Ideal Candidate for Momentum(k)–Space Carrier
Separation Photodetectors. North American Molecular Beam Epitaxy poster presentation –
September 19 – 21st 2022.

13.    T. McCarthy, Z. Ju, S. Schaefer, S.–Q. Yu, and Y.–H. Zhang. Momentum(k)–Space Carrier
Separation Using SiGeSn Alloys for Photodetector Applications. – Tri–Service Workshop on
GeSn and GeSiSn – January 10–11th 2022.

12.    Shunda Chen, Xiaochen Jin, Wanyu Zhao, and Tianshu Li. Short–range order in Group IV binary
alloys and non–universal deviation from Vegard’s law. APS March Meeting, Chicago, IL, March
2022. (Fully supported by MURI)

11.    (Invited) Tianshu Li. Chemical short–range order in SiGeSn medium–entropy alloys for
optoelectronics. Virtual, Korea Physical Society Pioneer Session, April 2022. (Fully supported
by MURI)

10.    (Invited) Tianshu Li. Computational discovery of co–existence of multiple short–range orders in
Si–Ge–Sn medium–entropy alloys. MRS Spring Meeting, Honolulu, HI, May 2022. (Fully
supported by MURI)

9.    (Invited) Tianshu Li. Short–range order in Si–Ge–Sn alloys. IEEE Photonics Society Summer
Topicals, Cabos San Lucas, Mexico, July 2022. (Fully supported by MURI)

8.    G. Sun, R. A. Soref, G.–E. Chang, S.–Q. Yu. Achievable Performance of Group–IV Mid–IR
Photodetectors and Longwave IR Quantum Cascade Detectors. invited talk at 2022 Summer
Topicals Meeting Series sponsored by IEEE Photonics Society, July 11–13, 2022.

25. Tyler T. McCarthy, R. Basnet, Z. Ju, J. Hu, S.-Q. Yu, and Y.-H. Zhang, “SiGeSn Alloys: From MBE Growth to Quantum Transport and Photodetector Applications” – Compound Semiconductor Week Workshop (CSW) – oral presentation – May 28th – June 3rd, 2023.

24. Tyler T. McCarthy, Rabindra Basnet, Zheng Ju, Xin Qi, Allison M. McMinn, Jin Hu, Shui-Qing Yu, and Yong-Hang Zhang. “Molecular Beam Epitaxy Grown Group-IV Alloys for Infrared Photodetector and Quantum Transport Applications.” The 37th North American Conference on Molecular Beam Epitaxy (NAMBE) – poster presentation – September 17 – 20th, 2023.

23. Tyler T. McCarthy, Zheng Ju, Xin Qi, Allison M. McMinn, Shui-Qing Yu, and Yong-Hang Zhang, “Molecular Beam Growth and Characterization of SiGeSnPb Group-IV alloys” – Tri-Service Workshop on GeSn and GeSiSn – oral presentation – October 25-26th, 2023.

22. G Sun, R. A. Soref, J. B. Khurgin, S.-Q. Yu and G.E. Chang “Design of L-Valley Ge/GeSiSn Waveguide Quantum Cascade Detector,” CLEO Conference (2023).

21.    Shunda Chen, Tianshu Li. Impacts of Short–range Order on Thermal conductivity of Si–Ge–Sn
Alloysα–Sn and Sn1–xGex Thin. APS March Meeting 2023, March 20–22 (2023).

20.    H. Stanchu, A. Kuchuk, O. Olorunsola, F. M. de Oliveira, Yu. I. Mazur, K. Pandey, M.
Benamara, M. Teodoro, S.–Q. Yu, G. Salamo. Thermal stability and Sn segregation in GeSn
structures. The 48th Conference on the Physics and Chemistry of Surfaces and Interfaces
(PCSI–48), January 15–19 (2023).

19.    N. M Eldose, H. Stanchu, C. Gunder‚ C. Li‚ F. M. de Oliveira‚ Yu. Mazur‚ M. Benamara, S.–Q.
Yu, G. J. Salamo. Growth of Ge1–xSnx Heteroepitaxial Layers with High Sn Content on InAs
(001) Substrate. The 48th Conference on the Physics and Chemistry of Surfaces and Interfaces
(PCSI–48), January 15–19 (2023).• Shunda Chen, Tianshu Li. Impacts of Short–range Order on Thermal conductivity of Si–Ge–Sn
Alloysα–Sn and Sn1–xGex Thin. APS March Meeting 2023, March 20–22 (2023).

18.    H. Stanchu, A. Kuchuk, O. Olorunsola, F. M. de Oliveira, Yu. I. Mazur, K. Pandey, M.
Benamara, M. Teodoro, S.–Q. Yu, G. Salamo. Thermal stability and Sn segregation in GeSn
structures. The 48th Conference on the Physics and Chemistry of Surfaces and Interfaces
(PCSI–48), January 15–19 (2023).

17.    N. M Eldose, H. Stanchu, C. Gunder‚ C. Li‚ F. M. de Oliveira‚ Yu. Mazur‚ M. Benamara, S.–Q.
Yu, G. J. Salamo. Growth of Ge1–xSnx Heteroepitaxial Layers with High Sn Content on InAs
(001) Substrate. The 48th Conference on the Physics and Chemistry of Surfaces and Interfaces
(PCSI–48), January 15–19 (2023).

32. Tianshu Li,“Bridging the gap between modeling and characterization to unravel short-range order and properties of Si-Ge-Sn-Pb alloys”, MRS Spring Meeting, Seattle, WA, April 2024. Supported by both MURI and EFRC.

31. Tianshu Li, “Bridging the gap between modeling and characterization to unravel the structure and properties of Si-Ge-Sn alloys”, 6th AFRL Workshop on GeSn and GeSiSn, Colorado Spring, CO, October 2024. Supported by both MURI and EFRC.

30. T. T. McCarthy, A. McMinn, X. Liu, R. Hossain, X. Qi, Z. Ju and Y-H. Zhang. GePb Alloys Grown using Molecular Beam Epitaxy for Infrared Photodetector and Short-Range Order Applications, – The 7th Tri-Service Workshop on GeSn and GeSiSn – oral presentation – September 22 – 24th, 2024.

29. T.T. McCarthy, A. McMinn, X. Liu, R. Hossain, X. Qi, Z. Ju, J. Liu, D. J. Smith, D. Jaeger, S.-Q. Yu, and Y.-H. Zhang. Transmission Electron Microscopy and Atomic Probe Tomography of SiGeSn Superlattices Grown Using Molecular Beam Epitaxy. – The 7th Tri-Service Workshop on GeSn and GeSiSn – oral presentation – September 22 – 24th, 2024.

28. T.T. McCarthy, A. M. McMinn, X. Liu, R. Hossain, X. Qi, Z. Ju, J. Liu, D. J. Smith, D. Jaeger, S.-Q. Yu, and Y.-H. Zhang. Molecular Beam Growth and Short-Range Order Effect in SiGeSn Digital Alloys and Superlattices. – The 7th Tri-Service Workshop on GeSn and GeSiSn – oral presentation – September 16 – 17th, 2024.

27. Tyler T. McCarthy, Allison M McMinn, Xiaoyang Liu, Razine Hossain, Xin Qi, Zheng Ju, and Yong-Hang Zhang. “Short Range Order Effects in Molecular Beam Epitaxy Grown SiGe/GeSn Superlattices” The 23rd International Conference on Molecular Beam Epitaxy (ICMBE) – submitted – September 8 – 13th, 2024.

26. Tyler T. McCarthy, Allison M. McMinn, Xiaoyang Liu, Razine Hossain, Xin Qi, Zheng Ju, and Y.-H. Zhang. “Molecular Beam Epitaxy Grown GePb Alloys.” The 38th North American Conference on Molecular Beam Epitaxy (NAMBE) – submitted – July 20 – 24th, 2024.

38. A. M. McMinn, T. T. McCarthy, H. Stanchu, X. Liu, Y. Wang, D. Jaeger, J. Liu, D. J. Smith, S.-Q. Yu and Y.-H. Zhang. Strained-Layer SiGe/GeSn Superlattices Grown Using Molecular Beam Epitaxy. – The 8th Tri-Service Workshop on GeSn and GeSiSn, Sept. 22-14, 2025.

37. A. M. McMinn, T. T. McCarthy, Y. Wang, X. Liu, R. Hossain, X. Qi, Z. Ju, D. Jaeger, J. Liu, D. J. Smith and Y-H. Zhang. SiGe/GeSn Superlattices Grown Using Molecular Beam Epitaxy. – The 39th North American Conference on Molecular Beam Epitaxy (NAMBE) – oral presentation – August 25 – 27th, 2025.

36. Nair A., Chen, S. Jin, X. & Li, T. Impact of Short-Range Ordering on Vacancy Formation in Group-IV Semiconductor Alloys, Research and Development Showcase of the School of Engineering and Applied Science at the George Washington University, March 2025.

35. Diandian Zhang, NIROSH ELDOSE, Dinesh Baral, Hryhorii Stanchu, Fernando Oliveira, Wei Du, Gregory Salamo, Shui-Qing Yu. Development of High-Quality SiSn and SiGeSn Alloys for Optoelectronic and Photonic Applications. The 39th North American Conference on Molecular Beam Epitaxy (NAMBE 2025), Albuquerque, New Mexico, August 25-27 (2025).

34. Shui-Qing Yu, Diandian Zhang, Nirosh Eldose, Dinesh Baral, Hryhorii Stanchu, Fernando Oliveira, Wei Du, Gregory Salamo. High-Quality Epitaxy of SiSn, GeSn, and SiGeSn Alloys Using MBE for Si-Based Optoelectronic Applications. The 39th North American Conference on Molecular Beam Epitaxy (NAMBE 2025), Albuquerque, New Mexico, August 25-27 (2025).

33. Nirosh Meckamalil Eldose, Diandian Zhang, Dinesh Baral, Hryhorii Stanchu, Fernando Maia de Oliveira, Sudip Acharya, Wei Du, Fisher Yu, Gregory J Salamo. Epitaxial Growth and Optical Properties of GeSn Alloys on Ge (100) and Si (100) via Molecular Beam Epitaxy. The 39th North American Conference on Molecular Beam Epitaxy (NAMBE 2025), Albuquerque, New Mexico, August 25-27 (2025).