Research Interests

• Quantum materials and devices
• Quantum-classical interface
• Novel nonreciprocal microwave devices

Ph.D., Princeton University, 2011

M.Sc., Princeton University, 2007

B.S., Zhejiang University, 2002

1. D.-X. Qu, J. J. Cuozzo, N. E. Teslich, K. G. Ray, Z. Dai, T. T. Li, G. F. Chapline, J. L. DuBois, and E. Rossi, "Phase-Slip Lines and Anomalous josephson effects in Tungsten nanoscale Cluster-Based Topological Insulator Nanobridges: Implications for Topologically Protected Qubits and Quantum Sensors," ACS Appl. Nano Mater. 7, 3702 (2024).
2. L. A. Martinez, G. Qiu, P. Deng, P. Zhang, K. G. Ray, L. Tai, M.-T. Wei, H. He, K. L. Wang, J. L. Dubois, and D.-X. Qu, "Edge magnetoplasmon dispersion and time-resolved plasmon transport in a quantum anomalous Hall insulator," Phys. Rev. Research 6, 013081 (2024).
3. D.-X. Qu, J. Berry, N. P. Calta, M. F. Crumb, G. Guss, and M. J. Matthews, “Temperature Measurement of Laser-Irradiated Metals Using Hyperspectral Imaging”, Phys. Rev. Applied 14, 014031 (2020).
4. Dong-Xia Qu, Nick E. Teslich, Zurong Dai, George F. Chapline, Thomas Schenkel, Sean R. Durham, and Jonathan Dubois, "Onset of a Two-Dimensional Superconducting Phase in a Topological-Insulator–Normal-Metal Bi_1-xSb_x/Pt Junction Fabricated by Ion-Beam Techniques", Phys. Rev. Lett. 121, 037001 (2018).
5. D.-X. Qu, X. Che, X. Kou, L. Pan, J. Crowhurst, M. R. Armstrong, J. Dubois, K. L. Wang, and G. F. Chapline, "Anomalous helicity-dependent photocurrent in the topological insulator (Bi_0.5Sb_0.5)₂Te₃ on a GaAs substrate", Physical Review B, 97, 045308 (2018).
6. D.-X Qu, S. K. Roberts, and G. F. Chapline , "Observation of Huge Surface Hole Mobility in the Topological Insulator Bi_0.91Sb_0.09 (111)", Physical Review Letters, 111, 176801 (2013).
7. D.-X Qu, Y. S. Hor, and R. J. Cava, "Quantum Oscillations in Magnetothermopower Measurements of the Topological Insulator Bi₂Te₃", Physical Review Letters, 109, 246602 (2012).
8. D.-X Qu, Y. S. Hor, J. Xiong, R. J. Cava, and N. P. Ong, "Quantum Oscillations and Hall Anomaly of Surface States in the Topological Insulator Bi₂Te₃", Science, 329 821 (2010).
9. J. G. Checkelsky, Y. S. Hor, M.-H. Liu, D.-X Qu, R. J. Cava and N. P. Ong, "Quantum Interference in Macroscopic Crystals of Nonmetallic Bi₂Se₃", Physical Review Letters, 103 246601 (2009).
10. D. Qu, R. Cendejas, Z. Liu, and C. Gmachl, "The Effect of Notch Angles on Quantum Cascade Microlasers with Highly Deformed Spiral-Resonators", Applied Physics Letters, 93 261116 (2008).
11. D. Qu and C. Gmachl, "Quasi-Chaotic Optical Multipass Cell", Physical Review A, 78, 033824 (2008).
12. D. Qu, Z. Liu, and C. Gmachl, "A compact asymmetric chaotic optical cavity with long optical path lengths", Applied Physics Letters, 93, 014101 (2008).
13. D. Qu, F. Xie, G. Shu, S. Momen, E. Narimanov, C. Gmachl, and D. L. Sivco, "Second-harmonic generation in quantum cascade lasers with electric field and current dependent nonlinear susceptibility", Applied Physics Letters, 90, 031105 (2007).
14. D. Qu and D. Grischkowsky, "Observation of a New Type of THz Resonance of Surface Plasmons Propagating on Metal-film Hole Arrays", Physical Review Letters, 93, 196804, (2004).
15. D. Qu, D. Grischkowsky, and W. Zhang, "Terahertz Transmission Properties of Thin Subwavelength Metallic Hole Arrays", Optics Letters, 29, 896, (2004).

• NSF Graduate Fellowship, 2009-2011
• Graduate Fellowship, Princeton University, 2005
• China Instrument Society Scholarship, China Instrument Society, 2002
• Outstanding Undergraduate Student Award, Zhejiang Province, China, 2002
• Meritorious Award in Mathematical Contest in Modeling (MCM), Consortium for Mathematics and Its Applications (COMAP), USA, 2001
• First Prize, Chinese Mathematical Contest in Modeling (CMCM), China, 2000
• Outstanding Scholarship, Zhejiang University, 1999-2001