Q. XuQianfan Xu

Assistant Professor

Electrical and Computer Engineering

Rice University


Office: Brockman Hall 338

Phone: (713)348-3576

e-mail: qianfan@rice.edu



Ph.D. Cornell University, 2007

M.S. Cornell University, 2006

M.E. Tsinghua University, 2002

B.E. Tsinghua University, 1999


Research Areas

Nanophotonic Devices and Systems; Optical Interconnections; Optical Sensing.

Selected Publications

  • Q. Xu, B. Schmidt, S. Pradhan, and M. Lipson, "Micrometre-scale silicon electro-optic modulator," Nature 435, 325-327, (2005).
  • Q. Xu, P. Dong, and M. Lipson, "Breaking the Delay-Bandwidth Limit in a Photonic Structure," Nature Physics 3, 405-410 (2007).
  • Y. Xia, C.Qiu, X. Zhang, W. Gao, J. Shu & Q. Xu "Suspended Si ring resonator for mid-IR application," Opt. Lett. 38,1122-1124(2013).
  • C. Qiu, J. Chen & Q. Xu "Ultraprecise measurement of resonance shift for sensing applications," Opt. Lett. 37,5012-5014(2012).
  • C. Qiu, J. Chen, Y. Xia & Q. Xu "Active dielectric antenna on chip for spatial light modulation," SCIENTIFIC REPORTS 2, 855 (2012).
  • C. Qiu, X. Ye, R. Soref, L. Yang, and Q. Xu, "Demonstration of reconfigurable electro-optical logic with silicon photonic integrated circuits," Opt. Lett. 37, 3942-3944(2012).
  • W. Gao, J. Shu, C. Qiu, and Q. Xu, "Excitation of Plasmonic Waves in Graphene by Guided-Mode Resonances," ACS NANO 6, 7806-7813 (2012).
  • C. Qiu and Q. Xu, "Controlling normal incident optical waves with an integrated resonator," Opt. Express 19, 26905-26910 (2011).
  • J.Shu, C.Qiu, V.Astley, D.Nickel, D.M. Mittleman, and Q.Xu, "High-contrast terahertz modulator based on extraordinary transmission through a ring aperture," Opt. Express 19, 26666-26671 (2011).
  • J.Shu, C.Qiu, X.Zhang, and Q.Xu, "Efficient coupler between chip-level and board-level optical waveguides," Opt. Lett. 36, 3614-3616 (2011).
  • Q. Xu, and R. Soref, "Reconfigurable optical directed-logic circuits using microresonator-based optical switches," Opt. Express 19, 5244-5259 (2011).
  • C. Qiu, J. Shu, Z. Li, X. Zhang, and Q. Xu, "Wavelength tracking with thermally controlled silicon resonators," Opt. Express 19, 5143-5148 (2011).
  • Q. Xu, "Silicon dual-ring modulator," Opt. Express 17, 20783-20793 (2009).
  • J. Ahn, M. Fiorentino, R. Beausoleil, N. Binkert, A. Davis, D. Fattal, N. Jouppi, M. McLaren, C. Santori, R. Schreiber, S. Spillane, D. Vantrease, and Q. Xu, "Devices and architectures for photonic chip-scale integration," Applied Physics A: Materials Science & Processing 95, 989-997 (2009).
  • Q. Xu, D. Fattal, and R. G. Beausoleil, "Silicon microring resonators with 1.5-um radius," Opt. Express 16, pp. 4309-4315 (2008).
  • S. Preble, Q. Xu, and M. Lipson, "Changing the color of light in a silicon resonator," Nature Photonics 1, 293-296 (2007).
  • Q. Xu, S. Manipatruni, B. Schmidt, J. Shakya, and M. Lipson, "12.5 Gbit/s carrier- injection-based silicon micro-ring modulators," Opt. Express 15, 430-436 (2007). [PDF]
  • Q. Xu, and M. Lipson, "All-optical logic based on silicon micro-ring resonators," Opt. Express 15, 924-929 (2007).
  • Q. Xu, S. Sandhu, M. L. Povinelli, J. Shakya, S. Fan, and M. Lipson "Experimental Realization of an On-Chip All-Optical Analogue to Electromagnetically Induced Transparency," Phys. Rev. Lett. 96, 123901 (2006). 
  • Q. Xu, B. Schmidt, J. Shakya, and M. Lipson, "Cascaded silicon micro-ring modulators for WDM optical interconnection," Opt. Express 14, 9431-9435 (2006).
  • Q. Xu, J. Shakya, and M. Lipson, "Direct measurement of tunable optical delays on chip analogue to electromagnetically induced transparency," Opt. Express 14, 6463- 6468 (2006). 
  • Q. Xu and M. Lipson, "Carrier-induced optical bistability in silicon ring resonators," Opt. Lett. 31, 341-343 (2006).
  • Q. Xu, V. Almeida, and M. Lipson, "Micrometer-scale all-optical wavelength converter on silicon," Opt. Lett. 30, 2733-2735 (2005).
  • Q. Xu, V. Almeida, and M. Lipson, "Demonstration of high Raman gain in a submicrometer-size silicon-on-insulator waveguide," Opt. Lett. 30, 35-37 (2005).
  • Q. Xu, V. Almeida, and M. Lipson, "Time-resolved study of Raman gain in highly confined silicon-on-insulator waveguides," Opt. Express 12, 4437-4442 (2004).
  • Q. Xu, V. Almeida, and M. Lipson, "Experimental demonstration of guiding and confining light in nanometer-size low-refractive-index material," Opt. Lett. 29, 1626-1628 (2004). 
  • V. Almeida, Q. Xu, C. A. Barrios, and M. Lipson, "Guiding and confining light in void nanostructure," Opt. Lett. 29, 209-1211 (2004).
  • Q. Xu and M. Yao, "Theoretical analyses on short-term stability of semiconductor fiber ring lasers," IEEE J. Quantum Electron. 39, 1260-1265 (2003).
  • Q. Xu, M. Yao, Y. Dong, W. Cai, and J. Zhang, "Experimental demonstration of pattern effect compensation using an asymmetrical Mach-Zehnder interferometer with SOAs," IEEE Photon. Technol. Lett. 13, 1325-1327 (2001).
  • Q. Xu, M. Yao, M. Chen, and J. Zhang, "Analytical calculation based on probability model for the pattern effect of SOA as in-line amplifier for WDM system," Opt. Commun. 195, 159-166 (2001).
  • Q. Xu, M. Yao, Y. Dong, and J. Zhang, "Interferometric method of suppressing the pattern effect in a semiconductor optical amplifier," Opt. Lett. 25, 1597-1599 (2000).