Physical Optics and Electronics Group
Prof. Rajeev Ram


  1. G. West, W. Loh, D. Kharas, C. Sorace-Agaskar, K. K. Mehta, J. Sage, J. Chlaverini, & R. J. Ram, "Low-loss integrated photonics for the blue and ultraviolet regime," APL Photonics (2019) DOI: [PDF] Link to Publication
  2. V. Mehra, R. Amatya, R. J. Ram, "Estimating the value of demand-side management in low-cost, solar micro-grids," Energy, 163 (2018): 74-87, DOI: [PDF] Link to Publication
  3. V. Stojanović, R. J. Ram, M. Popović, S. Lin, S. Moazeni, M. Wade, C. Sun, L. Alloatti, A. H. Atabaki, F. Pavanello, N. Mehta, & P. Bhargava, "Monolithic silicon-photonic platforms in state-of-the-art CMOS SOI processes," Optics Express, Vol. 26, No. 10 (2018) DOI: [PDF] Link to Publication
  4. A. H. Atabaki, S. Moazeni, F. Pavanello, H. Gevorgyan, J. Notaros, L. Alloatti, M. T. Wade, C. Sun, S. A. Kruger, H. Meng, K. Al Qubaisi, I. Wang, B. Zhang, A. Khilo, C. V. Baiocco, M. A. Popović, V. M. Stojanović & R. J. Ram, "Integrating photonics with silicon nanoelectronics for the next generation of systems on a chip," Nature, 556 (2018): 349-354, DOI: [PDF] Link to Publication
  5. W. F. Herrington Jr., G. P. Singh, D. Wu, P. W. Barone, W. Hancock & R. J. Ram, "Optical Detection of Degraded Therapeutic Proteins," Scientific Reports, 8:5098 (2018) DOI: DOI:10.1038/s41598-018-23409-z [PDF] Link to Publication
  6. S. Moazeni, S. Lin, M. Wade, L. Alloatti, R. J. Ram, M. Popović, V. Stojanović, "A 40-Gb/s PAM-4 Transmitter Based on a Ring-Resonator Optical DAC in 45-nm SOI CMOS," IEEE Journal of Solid-State Circuits Vol: 52, Issue 12, Dec 2017 (2017) DOI: 10.1109/JSSC.2017.2748620 [PDF] Link to Publication
  7. J. Xue, Z. Li, R. J. Ram, "Irreversible Thermodynamic Bound for the Efficiency of Light-Emitting Diodes," American Physical Society, Physical Review Applied, 8, 014017 (2017) DOI: 10.1103/PhysRevApplied.8.014017 [PDF] Link to Publication
  8. K. Mehta, R.J. Ram, "Precise and diffraction-limited waveguide-to-free-space focusing gratings," Nature, Scientific Reports, 7, Article Number: 2019 (2017) (2017) DOI: 10.1038/s41598-017-02169-2 [PDF] Link to Publication
  9. A. Atabaki, H. Meng, L. Alloatti, K. Mehta, R. J. Ram, "High-speed polysilicon CMOS photodetector for telecom and Datacom," Applied Physics Letters (2016): 109, 111106 (2016), DOI: 10.1063/1.4962641 [PDF] Link to Publication
  10. L. Alloatti, R. J. Ram, "Infrared vertically-illuminated photodiode for chip alignment feedback," AIP Advances (2016): 6, 085219 (2016), DOI: 10.1063/1.4961949 [PDF] Link to Publication
  11. K. Mehta, C. Bruzewicz, R. McConnell, R. J. Ram, J. Sage, J. Chiaverini, "Integrated optical addressing of an ion qubit," Nature Nanotechnology (2016) DOI: 10.1038/NNANO.2016.139 [PDF] Link to Publication
  12. P. Perez-Pinera, N. Han, S. Cleto, J. Cao, O. Purcell, K. A. Shah, K. Lee, R. J. Ram, T. K. Lu, "Synthetic biology and microbioreactor platforms for programmable production of biologics at the point-of-care," Nature Communications (2016) DOI: 10.1038/ncomms12211 [PDF] Link to Publication
  13. N. Han, S. Cho, A. Atabaki, E. Ye, W. Herrington, R. J. Ram , "Non-paraxial Talbot Effect for Building Compact Spectrometers," Computational Optical Sensing and Imaging (COSI), Heidelberg, Germany (2016) [PDF] Link to Publication
  14. E. Ye, A. Atabaki, N. Han, R. J. Ram, "Miniature, sub-nanometer resolution Talbot spectrometer," Optics Letters, V. 41, 11 (2016): 2434-2437, [PDF] Link to Publication
  15. L. Alloatti, D. Cheian, R. J. Ram, "High-speed modulator with interleaved junctions in zero-change CMOS photonics," Applied Physics Letters, 108, 131101 (2016) DOI: 10.1063/1.4944999 [PDF] Link to Publication
  16. L. Alloatti, and R. J. Ram, "Resonance-enhanced waveguide-coupled silicon-germanium detector," Applied Physics Letters (2016): 108, 071105 , DOI: 10.1063/1.4941995 [PDF] Link to Publication
  17. C. Sun, M. Wade, Y. Lee, J. Orcutt, L. Alloatti, M. Georgas, A. Waterman, J. Shainline, R. Avizienis, S. Lin, R. Kumar, F. Pavanello, A. Atabaki, H. Cook, A. Ou, B. Moss, J. Leu, Y-H. Chen, K. Asanovic, R. Ram, M. Popovic, V. Stojanovic , "Single-Chip Microprocessor with Integrated Photonic I/O," Nature (2015): v. 528, pp 534–538, DOI: 10.1038/nature16454 [PDF] Link to Publication
  18. H. Meng, A. Atabaki, J. Orcutt, and R. Ram, "Sub-bandgap polysilicon photodetector in zero-change CMOS process for telecommunication wavelength," Optics Express (2015): 23, 32643-32653 , DOI: 10.1364/OE.23.032643 [PDF] Link to Publication
  19. J. Xue, Y. Zhao, S. Oh, W. Herrington, J. Speck, S. DenBaars, S. Nakamura, R. J. Ram, "Thermally enhanced blue light-emitting diode," Applied Physics Letters (2015): 107, DOI: 10.1063/1.4931365 [PDF] Link to Publication
  20. L Alloatti, SA Srinivasan, JS Orcutt, RJ Ram, "Waveguide-coupled detector in zero-change complementary metal–oxide–semiconductor," Appl. Phys. Lett. 107, 041104 (2015) DOI: [PDF] Link to Publication
  21. C Sun, M Wade, M Georgas , S Lin , L Alloatti , B Moss , R Kumar, A Atabaki , F Pavanello , R Ram , M Popović , V Stojanović , "A 45nm SOI Monolithic Photonics Chip-to-Chip Link with Bit-Statistics-Based Resonant Microring Thermal Tuning," VLSI Symposium (2015) [PDF] Link to Publication
  22. NJ Mozdzierz, KR Love, KS Lee, HLT Lee, KA Shah, R. J. Ram, J.C. Love, "A perfusion-capable microfluidic bioreactor for assessing microbial heterologous protein production," Lab on a Chip (2015): 15, 2918-2922, DOI: 10.1039/C5LC00443H [PDF] Link to Publication
  23. L Alloatti, M Wade, V Stojanovic, M Popovic, R J Ram, "Photonics design tool for advanced CMOS nodes," IET Optoelectronics, Vol. 9, Iss. 4, (2015): 163–167, DOI: 10.1049/iet-opt.2015.0003 [PDF] Link to Publication
  24. G. Singh, S. Goh, M. Canzoneri, R. J. Ram, "Raman Spectroscopy of Complex Defined Media: Biopharmaceutical Applications," Journal of Raman Spectroscopy (2015) DOI: 10.1002/jrs.4686 [PDF] Link to Publication
  25. C. Sun, M. Georgas, J. Orcutt, B. Moss, Y.-H. Chen, J. Shainline, M. Wade, K. Mehta, K. Nammari, E. Timurdogan, D. Miller, O. Tehar-Zahav, Z. Sternberg, J. Leu, J. Chong, R. Bafrali, G. Sandhu, M. Watts, R. Meade, M. Popovic, R. Ram, V. Stojanovic, "A Monolithically-Integrated Chip-to-Chip Optical Link in Bulk CMOS," IEEE J. of Solid-State Circuits 50.4 (2015): 828-844, DOI: 10.1109/JSSC.2014.2382101 [PDF] Link to Publication
  26. K. K. Mehta, A. M. Eltony, C. D. Bruzewicz, I. L. Chuang, R. J. Ram, J. M. Sage, and J. Chiaverini, "Ion Traps Fabricated in a CMOS Foundry," Applied Physics Letters (2014) [PDF] Link to Publication
  27. N. Han, O. Purcell, K. S. Lee, T. K. Lu, R. J. Ram, "Microfluidics for Control in Synthetic Biology," MicroTAS, San Antonio, TX (2014) [PDF] Link to Publication
  28. D. Huang, P. Santhanam, and R. J. Ram, "Low-Power Communication with a Photonic Heat Pump," Optics Express, 22, S7 (2014): A1650-58, [PDF] Link to Publication
  29. K. K. Mehta, A. M. Eltony, C. D. Bruzewicz, I. L. Chuang, R. J. Ram, J. M. Sage, and J. Chiaverini, "Ion Traps Fabricated in a CMOS Foundry," Applied Physics Letters 105, 044103 (2014) [PDF] Link to Publication
  30. K. K. Mehta, J. S. Orcutt, J. M. Shainline, O. Tehar-Zahav, Z. Sternberg, R. Meade, M. A. Popović, and R. J. Ram, "Polycrystalline Silicon Ring Resonator Photodiodes in a Bulk Complementary Metal-Oxide-Semiconductor Process," Optics Letters 39, 4 (2014): 1061-4, [PDF] Link to Publication
  31. W. Loh, S. Yegnanarayanan, R. J. Ram, P. Juodawlkis, "A Nonlinear Optoelectronic Filter for Electronic Signal Processing," Nature Scientific Reports 4, 3613 (2014) [PDF] Link to Publication
  32. D. Gray, Jr, P. Santhanam, R. J. Ram, "Design for Enhanced Thermo-Electric Pumping in Light Emitting Diodes," Applied Physics Letters 103.12 (2013): 123503, DOI: 10.1063/1.4821266 [PDF] Link to Publication
  33. S. Chen, S. Lee, H. Lo, Y. Hung, K. Lee, C. Tu, Y. Pan, R. J. Ram, "Silicon Platform with Vertically Aligned Carbon Nanotubes for Enhancing Thermal Conduction in Hybrid Optoelectronic Integration," IEEE Trans. Compon. Packag. Manuf. Technol. 2.7 (2012): 1128-34, [PDF] Link to Publication
  34. J. Bahk, P. Santhanam, Z. Bian, R. J. Ram, A. Shakouri, "Resonant Carrier Scattering by Core-Shell Nanoparticles for Thermoelectric Power Factor Enhancement," Applied Physics Letters 100 (2012) DOI: 10.1063/1.3673615 [PDF] Link to Publication