Please visit my Google scholar webpage for latest publications (Link)
List of selected publications:
Peer-reviewed Journals:
1. R. Das*, Y. Xie, H. Frankis, K. Chen, J. Bradley, and A. Knights, "Gain enabled optical delay readout unit using CMOS compatible avalanche photodetectors," in OSA Photonics Research, 2022. (In review) (* corresponding author)
2. H. Frankis, Y. Xie, R. Das, K. Chen, J. Bradley, and A. Knights, "Application of the TDFA window in true optical time delay systems," in OSA Optics Express, 2022.
3. J. Kadum, S. Preussler, R. Das, Y. Mandalawi, and T. Schneider, " Temporal Disentanglement of Wireless Signal Carriers based on Quasi-Light-Storage," in IEEE/OSA Journal of Lightwave Technology, 2022. (In revision)
4. S. De, K. Singh, C. Kress, R. Das* et al., "Roll-off Factor Analysis of Optical Nyquist Pulses Generated by an On-chip Mach-Zehnder Modulator," in IEEE Photonics Technology Letters, doi: 10.1109/LPT.2021.3112485. (* corresponding author)
5. J. Kadum, R. Das*, A. Misra, and T. Schneider, "Brillouin Scattering Induced Transparency Enabled Reconfigurable Sensing of RF Signals," in OSA Photonics Research 9, 2021, doi: 10.1364/PRJ.427691. (* corresponding author) (Editor’s pick)
6. S. De, A. Misra, R. Das*, T. K. Ostmann, and T. Schneider, "Analysis of Non-idealities in the Generation of Reconfigurable Sinc-shaped Optical Nyquist Pulses," in IEEE Access, vol. 9, pp. 76286-76295, 2021, DOI: 10.1109/ACCESS.2021.3082847. (* corresponding author)
7. R. Das* and T. Schneider, “Integrated Group Delay Units for Real-time Reconfigurable Spectrum Sensing of mm-wave Signals”, Optics Letters, vol. 45, 4778-4781, doi: 10.1364/OL.396038 (2020). (* corresponding author)
8. S. De, R. Das*, R. Varshney, and T. Schneider, “CMOS-compatible Photonic Phase Shifters with Extremely Low Thermal Crosstalk Performance”, IEEE/OSA Journal of Lightwave Technology, 2020, DOI: 10.1109/JLT.2020.3043631. (* corresponding author)
9. S. De, R. Das*, R. K. Varshney, and T. Schneider, "Design and Simulation of Thermo-Optic Phase Shifters with Low Thermal Crosstalk for Dense Photonic Integration," in IEEE Access, vol. 8, 2020, DOI: 10.1109/ACCESS.2020.3013116. (* corresponding author)
10. R. Das*, Q. Zhang, and H. Liu, " All Passive Realization of Lossy Microwave Filters Using Coupling Matrix Decomposition Technique," in IEEE Access, vol. 7, pp. 5095-5105, 2019, DOI: 10.1109/ACCESS.2018.2887298. (* corresponding author)
11. R. Das, Q. Zhang, and H. Liu, "Computer- Aided Tuning of Highly Lossy Microwave Filters Using Complex Coupling Matrix Decomposition and Extraction," in IEEE Access vol. 6, pp. 57172-57179, 2018, DOI: 10.1109/ACCESS.2018.2873688.
12. R. Das, Q. Zhang, and H. Liu, "Lossy Coupling Matrix Synthesis Approach for the Realization of Negative Group Delay Response," in IEEE Access, vol. 6, pp. 1916-1926, 2018, DOI: 10.1109/ACCESS.2017.2780888.
13. A. Kandwal, Nie Z, Wang L, Liu L.W.Y, and R. Das, “Realization of Low-Profile Leaky Wave Antennas Using the Bending Technique for Frequency Scanning and Sensor Applications” Sensors. 2019, 19(10), 2265, DOI: 10.3390/s19102265.
14. A. Kandwal, Nie Z, Li J Liu Y, WY. Liu L, and R. Das, “Bandwidth and Gain Enhancement of Endfire Radiating Open-Ended Waveguide Using Thin Surface Plasmon Structure”. Electronics. 2019; 8(5):504, DOI: 10.3390/electronics8050504, 2019.
15. Q. Zhang, B. Li, R. Das, and C. Caloz, "One-Port Coupling Matrix Synthesis for Reflection-Type Devices," in IEEE Microwave and Wireless Components Letters, vol. PP, no. 99. PP 1-3, Oct. 2017, doi: 10.1109/LMWC.2017.2750412.
16. A. Kandwal, Q. Zhang, R. Das, X. Tang, and L.Wy Liu, “Model Analysis of Coupled-Mode Leaky Wave Antenna For Forward and Backward Frequency Scanning”, Microw. Opt. Technology Lett., Apr. 2018, DOI: 10.1002/mop.31164.
17. L. Liu, Q. Zhang, Y. Teeti, and R. Das, "Wireless Energy Harvesting by Direct Voltage Multiplication on Lateral Waves from a Suspended Dielectric layer," IEEE Access, vol. 5, pp. 21873-21884, 2017, doi: 10.1109/ACCESS.2017.2757947.
18. A. Kamma, R. Das, D. Bhatt, and J. Mukherjee, "Multi Mode Resonators Based Triple Band Notch UWB Filter," in IEEE Microwave and Wireless Components Letters, vol. 27, no. 2, pp. 120-122, Feb. 2017, doi: 10.1109/LMWC.2017.2649383.
19. A. Kamma, R. Das, and J. Mukherjee, "Spurious Free Independently Controllable Compact Quad-band Filter Using Folded T-shaped Stub Loaded Modified Ring Resonator," in IET Microwaves, Antennas & Propagation, vol. 11, no. 8, 2017, doi: 10.1049/iet-map.2016.0965.
20. A. Kandwal, T. Igbe, J. Li, L. Liu, R. Das, L. Wang, and Z. Nie, “A Novel Method of Using Bifilar Spiral Resonator for Designing Thin Robust Flexible Glucose Sensors," in IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-10, 2021, Art no. 8004810, doi: 10.1109/TIM.2021.3115201.
Peer-reviewed Conference Publications:
R. Das, Y. Xie, A. Knights, "Photonic Image Rejection Filter for Optical Beamforming Network," 2022 Photonics North (PN), ON, Canada, 2022, pp. 1-1.
Y. Xie, R. Das, A. Knights et. al, " Optical Delay Characterization Using Avalanche Photodetectors," 2022 Photonics North (PN), ON, Canada, 2022, pp. 1-1.
R. Kruzelecky, P. Katkov, QY. Peng, I. Sinclair, R. Anthony, Y. Xie, R. Das, A. Knights et. al, " Electro-Absorption Optical Modulator Development for High-Speed Optical Data Links," 2022 Photonics North (PN), ON, Canada, 2022, pp. 1-1.
J. Kadam, S. Preussler, R. Das, T. Schneider, " Stimulated Brillouin Scattering Based Light Storage Enabled Frequency Identification," 2022 CLEO, CA, USA, 2022, pp. 1-1.
H. Frankis, Y. Xie, R. Das, A. Knights et. al, " Optical Delay in the TDFA Wavelength Window," 2022 Photonics North (PN), ON, Canada, 2022, pp. 1-1.
Y. Gao, Y. Xie, R. Das, A. Knights et. al, "All-silicon Avalanche Photodetectors Operating at 1550 nm," 2022 Photonics North (PN), ON, Canada, 2022, pp. 1-1.
S. De, R. Das, K. Singh, Y. Mandalawi, T.K.Ostmann and T. Schneider, "Thermal Crosstalk Mitigation in a Dual-drive Mach-Zehnder Modulator," 2022 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD), Italy, 2022, pp. 1-1.
S. De, R. Das, K. Singh, Y. Mandalawi, T.K.Ostmann and T. Schneider, "Temperature Insensitive Avalanche Photodetectors," 2022 Integrated Photonics Research (IPR), Maastricht, Netherlands, 2022, pp. 1-1, doi:
S. De, R. Das, K. Singh, Y. Mandalawi, T.K.Ostmann and T. Schneider, "Impact of Thermal Crosstalk in Avalanche Photodetectors in THz Domain," 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Delft, Netherlands, 2022, pp. 1-1, doi:
Y. Mandalawi, R Das, and T Schneider, “Integrated Silicon Resonator with Bragg Grating Reflectors for Passive Reservoir Computing” 2021 OSA Frontiers in Optics + Laser Science Conference, 2021.
J. Kadum, R Das, A. Misra, and T Schneider, “Stimulated Brillouin Scattering-Induced All-Optical Spectrum Sensing” 2021 OSA Frontiers in Optics + Laser Science Conference, 2021.
R Das, S. De, and T Schneider, “On-chip Inductive Peaking to Boost the Silicon Modulator Bandwidth”, OSA Advanced Photonics Congress, 26-30 Jul., 2021. (Best paper finalist)
J. Kadum, A. Misra, R Das, and T Schneider, “Slow Light Enabled Reconfigurable Temporal Frequency Discriminator”, OSA Advanced Photonics Congress, 26-30 Jul., 2021. (Best paper finalist)
S. De, R Das, T.K. Ostmann, and T Schneider, “Athermal Travelling Wave Mach-Zehnder Modulator for Optical Interconnects”, OSA Advanced Photonics Congress, 26-30 Jul., 2021.
S. De, R Das, T.K. Ostmann, and T Schneider, “Characterization of non-idealities in optical Nyquist pulses for THz signal sampling metrology”, IEEE IRMMW-THZ, Aug. 29-03 Sept., 2021.
S. De, R Das, T.K. Ostmann, and T Schneider, “Effect of Thermal Crosstalk on Travelling-Wave Mach-Zehnder Modulator”, Conf. on Lasers and Electro-Optics (CLEO)-Europe, Munich, Germany, 20-24 Jun., 2021.
S. De, R. Das, R. K. Varshney and T. Schneider, "Thermal Crosstalk Resilient Integrated Optical Attenuator," in Frontiers in Optics / Laser Science, OSA Technical Digest (Optical Society of America, 2020), paper FW7D.5.
R Das and T Schneider “Photonic Sampling for the Metrology of THz Wireless Communications”, 9th International Workshop on THz Technology and Applications, Kaiserslautern, Germany, 3-4 Mar., 2020.
Q. Zhang and R Das “Coupling Matrix Extraction of Lossy Cross-coupled Filters Using Exact Pole-Zero Identification,” URSI AP-RASC, New Delhi, India, 9-15 Mar. 2019.
R. Das, Q. Zhang, and A. Kandwal, “Coupling Matrix Extraction Technique For Auto Tuning of Highly Lossy Filters,” 2018 IEEE International Microwave Symposium (IMS), Philadelphia, Pennsylvania, US, 10-15 Jun. 2018.
R. Das, Q. Zhang, and A. Kandwal, “Coupling Matrix Sign Reversal Transformation,” 2018 IEEE International Wireless Symposium (IWS), Chengdu, China, 6-10 May 2018.
R. Das, Q. Zhang, and A. Kandwal, and B. Li, “Coupling Matrix Synthesis of Flat Negative Group Delay with Zero Back Scattering,” The 2018 IEEE ICCEM, Chengdu, Sichuan, China, 26-28 Mar. 2018.
R. Das, Q. Zhang, and A. Kandwal, “Synthesis and Implementation of Superluminal Circuits with Zero Group Delay”, The 2017 IEEE Asia-Pacific Conference on Antenna and Propagation (APCAP), Xi’an, China, 16-19 Oct. 2017.
R. Das, Q. Zhang, and A. Kandwal, “General Synthesis Method for Negative Group Delay Response: A Filter Base Approach”, The 20th European Microwave Week, Nuremberg, Germany, 08-13 Oct. 2017. (Travel grant awardee)
R. Das, Q. Zhang, and A. Kandwal, “Synthesis of Dispersionless Zero Group Delay Line for Series-Fed Antenna Arrays”, 2017 International Applied Computational Electromagnetics Society (ACES) Symposium, Suzhou, China, 1-4th Aug. 2017. (Best paper finalist)
R. Das, Q. Zhang, and A. Kandwal, “Synthesis of Lossy Coupling Matrix for Negative Group Delay Filters”, 10th Global Symposium on Millimeter-waves (GSMM 2017), Hong Kong, 24-26 May, 2017.
Q. Zhang, R. Das, and Y. Chen, “Coupling Matrix Synthesis Techniques for Non-Filter Applications,” The Conference on Electromagnetic Compatibility (AP-EMC’2017), Xi’an, China, 16-19 Oct. 2017 (Invited Talk)
A. Kandwal, Q. Zhang, X. Tang, L. WY Liu, R. Das, and Y. Chen, “Cross dipole EBG based high efficiency dual band antenna for millimeter wave communication systems”, The 5th Advanced Electromagnetics Symposium, Incheon-Seoul, South Korea, 26-28 Jul. 2017.
A. Kandwal, Q. Zhang, Y. Chen, X. Tang, R. Das, and T. Guo, “Mode analysis of Inverted V-Shaped Microstrip Leaky Wave Antenna”, The 2017 IEEE Asia-Pacific Conference on Antenna and Propagation (APCAP), Xi’an, China, 16-19 Oct. 2017.
A. Kamma, R. Das, and J. Mukherjee, "Multiple band notch filter using contiguous split ring resonators (SRR)," Asia-Pacific Microwave Conference (APMC), New Delhi, 2016.
A. Kamma, R. Das, and J. Mukherjee, "Controllable dual-mode dual-passband filter using inductive short stub SRR (ISSSRR)," 2016 Asia-Pacific Microwave Conference (APMC), New Delhi, 2016.
P. M. Adhikari, A. Karmakar, and R. Das, "A Switched Capacitor Based Realization of Fractional Order Low-Pass Filters," 2015 5th IEEE International Conference on Communication Systems and Network Technologies, Gwalior, 2015.