YUHANG REN, Ph.D.
Associate Professor
Department of Physics and Astronomy
Hunter College

Office Address:
695 Park Avenue, Room 1204 HN
New York, NY 10065

Phone: 212 772-5258
Fax: 212 772-5390
Email: yre@hunter.cuny.edu

Office Hours for Fall 2009:  

M, W 3-4 PM

 

RESEARCH INTERESTS & ACTIVITIES

Novel electronic and magnetic materials and devices, semiconductor quantum structures, optical response of solids, spintronic and electronic properties of solids, nano-fabrication, biomedical optics, coherent ultrafast x-rays, THz, far- and mid-infrared spectroscopy.

The Ultrafast Optics Group

CLASSES FOR 2005 - 2009

Fall 2008
Physics 334: Intermediate Electricity & Magnetism

Spring 2008
Physics 120: General Physics: Introduction to Electricity and Magnetism

Fall 2005, 2007, and Spring 2009
Physics 121: Introduction to Electricity, Magnetism, Light, & Quantum Physics

Spring 2006, 2007
Physics 111: General Physics: Introductory Course in Mechanics, Heat, and Sound

Fall 2006, 2009
Physics 330: Atomic & Nuclear Physics

Education History

Postdoctoral Research Fellow: Oct. 2003 -Sept. 2005, at the University of Michigan, Ann Arbor, MI ( Advisor: Prof. Roberto Merlin)

Ph.D in Laser & Optics (and Surface & Interface), Applied Science Dep. May 09, 2003
College of William & Mary, USA
Thesis: Time-Resolved Optical Studies of Colossal Magneto-Resistance and Charge- Density Wave Materials ( Advisor : Prof. Gunter Lüpke)

Ph. D in Condensed Matter Physics, Physics Dep. May 26, 1999
Zhejiang University, China
Thesis: Confined Polaron in Low-dimensional Semiconductor Heterojunctions ( Honored )
(Advisors : Prof. Qirui Zhang and Prof. Zhengkuan Jiao)

RECENT PUBLICATIONS 

1. “Shining Light on BaFe1.85Co0.15As2: a multi-gap, nonphonon dominated, s-wave superconductor”, “J. J. Tu, J. Li, W. Liu, Y. Gong, L. J. Li, G. H. Cao, J. P. Carbotte, C. C. Homes, Z. A. Xu, and Y. H. Ren, (submitted, 2009.)

2. “Universal entangler with photon pairs in arbitrary states”, Bing He, Janos Bergou, and Yuhang Ren, J. Phys. B: At. Mil. Opt. Phys. 43, 025502 (2010).

3. “Ultrafast quasiparticle dynamics of charge/orbital ordered and ferromagnetic clusters in La0.7Ca0.3MnO3”, Y. H. Ren, M. Ebrahim, Z.A. Xu, and G. Luepke, N. J. Phys. 11, 113013 (2009).

4. “Processing multiphoton state through operation on single photon: Methods and applications”, Qing Lin, Bing He, Janos Bergou, and Yuhang Ren, Phys. Rev. A 80, 042311 (2009).

5. “Determination of magnetic anisotropies, interlayer coupling and spin relaxation in CoFeB/Cr/CoFeB”, Y. Gong, Z. Cevher, W. Lai, Y. Chen, S. D. Yoon, N. X. Nian, and Y. H. Ren, J. Appl. Phys. 106, 063916 (2009).

6. “Ultrafast optical diagnostics of surface/interface magnetism and magnetization reorientation in Fe film and nanoparticle arrays”, Y. H. Ren, W. Lai, R. Kutayiah, C. Kim, S. Delikanli, and Hao Zeng, Composites Part B: Engineering (invited, in press, 2009).

7. “Observation of insulating nano-islands in ferromagnetic GaMnAs”, D. M. Wang, Y. H. Ren, P. W. Jacobs, S. Fahy, X. Liu, J. K. Furdyna, V. F. Sapega, and R. Merlin, Phys. Rev. Lett. 102, 256401 (2009).

8. “Giant electrical field tuning of magnetism in novel multiferroic FeGaB/Lead Zinc Niobate Lead Titanate heterostructures”, Jing Hou, Ming Liu, David Reed, Yuhang Ren, and Nian X. Sun, Adv. Mater., 21, 1 (2009).

9. “Creation of high-quality long-distance entanglement with flexible resources”, Bing He, Yuhang Ren, Janos Bergou, Phys. Rev. A 79, 052323 (2009).

10. “Magnetic anisotropy and spin wave relaxation in CoFe/PtMn/CoFe trilayer films”, Y. H. Ren, C. Wu, G. Yu, C. Pettiford, and N. X. Sun, J. App. Phys. 105, 073910 (2009).

11. “Ultrafast optical study of spin wave resonance and relaxation in CoFe/PtMn/CoFe trilayer films”, Y. H. Ren, C. Wu, Y. Gong, C. Pettiford, and Nian X. Sun, J. App. Phys. 105, 07D304 (2009).

12. “Time-resolved optical studies of spin and quasiparticle dynamics in in colossal magnetoresistance materials: La0.67Ca0.33 MnO3, La0.67Sr0.33MnO3, and Sr2FeMoO6”, Y. H. Ren, M. Ebrahim, H.B. Zhao, G. Luepke, Z. A. Xu, V. Adyam, and Qi Li, Phys. Rev. B 78, 014408 (2008).

13. “Ferromagnetic resonance studies of surface and bulk spin-wave modes in CoFe/PtMn/CoFe multilayer films”, Cheng Wu, Steven Greenbaum, Carl Pettiford, Nian X Sun, Yuhang Ren, J. App. Phys. 103. 07B525 (2008).

14. “Angular dependence of spin-wave resonance and relaxation in half-metallic Sr2FeMoO6 thin films”, Tetiana Nosach, Gabriella Mullady, Steven Greenbaum, Adyam Venimadhav, Qi Li, Yuhang Ren, J. App. Phys. 103. 07E311 (2008).

15.  “Universal discriminator for completely unknown optical qubits”, Bing He, Janos Bergou, Yuhang Ren, Phys. Rev. A 76, 032301 (2007).

16. “Generation and detection of coherent longitudinal acoustic phonons in the La0.67Sr0.33MnO3 thin films by femtosecond light pulses”, Y. H. Ren, M. Trigo, R. Merlin, Venimadhav Adyam, and Qi Li, Appl. Phys. Lett. 90, 251918 (2007).

17. “Light-induced magnetic precession in (Ga,Mn)As slabs: Hybrid standing-wave Damon-Eshbach modes”, D. M. Wang, Y. H. Ren, X. Liu, J. K. Furdyna, M. Grimsditch, and R. Merlin, Phys. Rev. B 75, 233308 (2007).

18. “Ultrafast magneto-optical Kerr study of standing spin waves in ferromagnetic GaMnAs films”, D. M. Wang, Y. H. Ren, X. Liu, Y. J. Cho, J. K. Furdyna, M. Grimsditch, and R. Merlin, Superlattices and Microstructures 41, 372 (2007).

19. “Anomalous first-to-zero sound crossover in La1-xCaxMnO3: hard solid shows soft side”, Yuhang Ren, G. Lüpke, Yufeng Hu, Qi Li, C. S. Hong, N. H. Hur, and R. Merlin, Phys. Rev. B 74, 012405 (2006).

20. “Low-energy collective excitations in a charge–density wave conductor K0.3MoO3”, Z. A. Xu, X. F. Xu, G. Lüpke and Y. H. Ren, Journal of Luminescence 119-120, 395 (2006).