About Me

    Hi, thanks for visiting Alex Song's site. I am a postdoctoral fellow in Prof. Shanhui Fan's group at Stanford University. My main research interest is in photonics, where I engage in both theorerical and experimental studies of photonic structures that are applicable in sustainable energy, photonic integration, remote sensing, etc. Some recent topics include topogocial photonics, non-reciprocity, parity-time (\(\mathcal{PT}\)) symmetry in photonics, and passive radiative cooling. Please check my publications page for recent updates.

    My thesis work in Prof. Claire Gmachl's group at Princeton University focuses on intersubband optical devices. The experimental part of the work explores novel quantum cascade light sources and photodetectors, especially in III-nitride material system. The theoretical part focuses on the transport and optical properties of intersubband quantum structures, using techniques such as the non-equilibrium Green's functions. I have worked on mid-IR solid state lasers and negative refraction metamaterials as well.

Journal Publications

  1. Alex Y. Song, Akhil Raj Kumar Kalapala, Weidong Zhou, and Shanhui Fan, "First-principles simulation of photonic crystal surface-emitting lasers using rigorous coupled wave analysis", Appl. Phys. Lett. 113, 041106 (2018)
  2. Alex Y. Song, Peter B. Catrysse, and Shanhui Fan, "Broadband Control of Topological Nodes in Electromagnetic Fields", Phys. Rev. Lett. 120, 193903 (2018)
  3. Yucan Peng, Jun Chen, Alex Y. Song, Peter B. Catrysse, Po-Chun Hsu, Lili Cai, Bofei Liu, Yangying Zhu, Guangmin Zhou, David S. Wu, Hye Ryoung Lee, Shanhui Fan & Yi Cui, "Nanoporous polyethylene microfibres for large-scale radiative cooling fabric", Nature Sustainability 1, 105-112 (2018)
  4. Po-Chun Hsu, Chong Liu, Alex Y. Song, Ze Zhang, Yucan Peng, Jin Xie, Kai Liu, Chun-Lan Wu, Peter B. Catrysse, Lili Cai, Shang Zhai, Arun Majumdar, Shanhui Fan, Yi Cui, "Dual-mode textile for human body radiative heating and cooling", Science Advances 3, 11 (2017)
  5. Lili Cai, Alex Y. Song, Peilin Wu, Po-Chun Hsu, Yucan Peng, Jun Chen, Chong Liu, Peter Catrysse, Yayuan Liu, Ankun Yang, Chenxing Zhou, Chenyu Zhou, Shanhui Fan, and Yi Cui, "Warming up Human Body by Nanoporous Metallized Polyethylene Textile", Nature Communications 8, 496 (2017)
  6. Alex Y. Song, Rajaram Bhat, Pierre Bouzi, Chung-En Zah and Claire Gmachl, "Three Dimensional Interface Roughness in Thin Layered Semiconductor Structures and Its Effects on Intersubband Transitions", Phys. Rev. B 94, 165307 (2016)
  7. Po-Chun Hsu, Alex Y. Song, Peter B. Catrysse, Chong Liu, Yucan Peng, Jin Xie, Shanhui Fan, and Yi Cui, "Radiative Human Body Cooling by Nanoporous Polyethylene Textile", Science 353, 1019 (2016)
  8. Peter B. Catrysse, Alex Y. Song, and Shanhui Fan, "Photonic Structure Textile Design for Localized Thermal Cooling Based on a Fiber Replacement/Blending Scheme", ACS Photonics 3, 2420-2426 (2016)
  9. Alex Y. Song, Rajaram Bhat, Andrew Allerman, Jie Wang, Tzu-Yung Huang, Chung-En Zah, and Claire Gmachl, "Quantum Cascade Emission in III-Nitride Materials Designed with Effective Interface Grading", Appl. Phys. Lett. 107, 132104 (2015)
  10. Omri Wolf, Andrew A. Allerman, Xuedan Ma, Joel Wendt, Alex Y. Song, Eric A. Shaner and Igal Brener, "Enhanced Intersubband second harmonic generation from III-Nitride Heterostructures Coupled to Metamaterials", Appl. Phys. Lett. 107, 151108 (2015)
  11. Yu Song, Rajaram Bhat, Tzu-Yung Huang, Pranav Badami, Chung-En Zah and Claire Gmachl, "III-Nitride Quantum Cascade Detector Grown by Metal Organic Chemical Vapor Deposition", Appl. Phys. Lett. 105, 182104 (2014)
  12. Yu Song, Jens Sonntag, Sergey B. Mirov, Claire Gmachl and Jacob Khurgin, "Mid-infrared light emission from a Fe\(^{2+}\):ZnSe polycrystal using quantum cascade laser pumping", Appl. Phys. Lett. 105, 141108 (2014)
  13. Pierre M. Bouzi, YenTing Chiu, Christoph Deutsch, Yamac Dikmelik, Yu Song, Vadim Tokranov, Serge Oktyabrsky, and Claire F. Gmachl, "Importance of Growth Direction in Mid-Infrared Quantum Cascade Lasers", J. Appl. Phys. 116, 034504 (2014)
  14. Chao Wang, Qi Zhang, Yu Song and Stephen Y. Chou, "Plasmonic Bar-Coupled Dots-on-Pillar Cavity Antenna with Dual Resonances for Infrared Absorption and Sensing: Performance and Nanoimprint Fabrication", ACS Nano 8 (3), 2618-2624 (2014)
  15. Yu Song, Dong Chen, Lai Wang, Hongtao Li, Guangyi Xi, and Yang Jiang, "Splitting of Valance Subbands in Wurtzite c-Plane InGaN/GaN Quantum Well Structure", Appl. Phys. Lett. 93, 161910 (2008)
  16. Jin Huang, Changzheng Sun, Yu Song, Bing Xiong, Yi Luo, "Phase Noise of Optically Generated Microwave using Sideband Injection Locking", Chinese Phys. Lett. 25, 3980 (2008)
These authors contributed equally.

Conference Presentations

  1. Alex Y. Song, Peter B. Catrysse, and Shanhui Fan "Broadband Control of Topological Nodes in Electromagnetic Fields", CLEO: Science and Innovations, FTu3E.7, 2018
  2. Yu Song, Rajaram Bhat, Andrew Allerman, Tzu-Yung Huang, Chung-En Zah, and Claire Gmachl, "Light Emission from III-Nitride Quantum Cascade Structures Designed with Effective Interface Grading", SPIE Photonics West, 2015
  3. Yu Song, Rajaram Bhat, Andrew Allerman, Tzu-Yung Huang, Chung-En Zah, and Claire Gmachl, "Intersubband Electroluminescence in GaN/Al\(_x\)Ga\(_{1-x}\)N Quantum Cascade Emitter Structure", International Quantum Cascade Lasers School & Workshop, 2014
  4. Yu Song, Rajaram Bhat, Andrew Allerman, Tzu-Yung Huang, Pranav Badami, Chung-En Zah, and Claire Gmachl, "Mid-Infrared GaN/Al\(_x\)Ga\(_{1-x}\)N Quantum Cascade Detectors Grown by MOCVD", CLEO: Science and Innovations, STh4I.2, 2014
  5. Yu Song, Rajaram Bhat, Pierre Bouzi, Chung-En Zah and Claire Gmachl, "Effect of Quasi Two Dimensional Interface Roughness in Ultra-Thin Semiconductor Quantum Wells", APS March Meeting, 2014
  6. Yu Song, Rajaram Bhat, Chung-En Zah, Pranav Badami, Tzu-Yung Huang, and Claire Gmachl, "Mid-Infrared GaN/Al\(_x\)Ga\(_{1-x}\)N Quantum Cascade Structures Grown by MOCVD", The 12th International Conference on Intersubband Transitions in Quantum Wells, 2013
  7. Yu Song, Sergey B. Mirov, Claire F. Gmachl, and Jacob B. Khurgin, "Photoluminescence Characteristics of Fe\(^{2+}\):ZnSe Crystals with Quantum Cascade Laser Pumping", CLEO: Science and Innovations, CF1I.1, 2013
  8. Yu Song, Rajaram Bhat, Chung-En Zah, and Claire Gmachl, "Intersubband Absorption and Electron Transport Study in MOCVD Grown GaN / AlN and GaN / Al\(_{0.6}\)Ga\(_{0.4}\)N Superlattices", International Quantum Cascade Lasers School & Workshop, 2012
  9. Yu Song, Sergey B. Mirov, Claire F. Gmachl, and Jacob B. Khurgin, "Photoluminescence in a Fe\(^{2+}\):ZnSe Crystal Using Near Absorption Edge Quantum Cascade Laser Pumping", CLEO: Science and Innovations, CTu2D.3, 2012
  10. Yu Song, Yamac Dikmelik, Claire F Gmachl, and Jacob B Khurgin, "Modeling the Transport and Lasing Characteristics of Quantum Cascade Lasers", Quantum Electronics and Laser Science Conference (QELS), JW2A.93, 2012
  11. Yu Song, Yamac Dikmelik, Jacob Khurgin, "Practical Model for the Transport and Lasing Characteristics of Quantum Cascade Lasers", The 11th International Conference on Intersubband Transitions in Quantum Wells, 2011
  12. Yu Song, Jacob B Khurgin, Yamac Dikmelik, "A Practical Transport and Lasing Model for Quantum Cascade Lasers", SPIE Photonics West, 2011
  13. (Selected from MIRTHE Summer Workshops) Yu Song, Matthew Escarra, Colin Montemarano, William Charles, Claire Gmachl, "Active Metamaterials with Current Injection to Compensate Losses", MIRTHE Summer Workshop, 2010
  14. Yu Song, Bing Xiong, Changzhen Sun, Yi Luo, "Low residual stress and high repeatability of SiNx thin films for InP-based optoelectronic device fabrication by dual radio frequency plasma enhanced chemical vapor deposition", IEEE 19th International Conference on Indium Phosphide and Related Materials, pp. 233, 2007
  15. Jin Huang, Changzheng Sun, Bing Xiong, Yu Song, Yi Luo, "Phase Noise Characteristics of Optically Generated Microwave by Sideband Injection Locking", International Nano-Optoelectronic Workshop, pp. 301, 2008
These authors contributed equally.

Professional Preparation

Postdoc

Electrical Engineering, Stanford University

2015 ~ now

Postdoc

Electrical Engineering, Princeton University

2014 ~ 2015

Ph.D.

Electrical Engineering, Princeton University

2014

 

Minor 1: Applied Mathematics, Minor 2: Physics

 

M.S.

Electronic Engineering, Tsinghua University

2009

B.S. (with Honor)

Mathematics and Physics, Tsinghua University

2006

Services & Other Activities

  • Teaching assistant, ELE-208, “Electronic and Photonic Devices”, 2014 spring & 2013 spring
  • Teaching assistant, IC & Optics Fabrication Course, ELE, 2013 fall
  • Mentor to more than ten undergraduate students in their summer research programs, independent works and/or junior and senior theses at Princeton University
  • I am a reviewer for journals from American Institute of Physics (AIP), Optical Society of America (OSA) and Institute of Electrical and Electronics Engineers (IEEE)
  • I've volunteer in various programs for introducing science and engineering to pre-college students and the general public (YSAP, annual Science and Engineering Expo, engineering school / ELE departmental open houses, MIRTHE exhibition at various conferences and events, etc.) I love teaching science to the next generation!