Publications

Selected Peer-Reviewed Publications

  • V. Nikkhah, A. Pirmoradi, F. Ashtiani, B. Edwards, F. Aflatouni, N. Engheta “Inverse designed low-index-contrast structures on silicon photonics platform for vector-matrix multiplication,” Nature Photonics, https://doi.org/10.1038/s41566-024-01394-2 (2024).
  • K. Omirzakhov, A. Pirmoradi, and F. Aflatouni, “Monolithically Integrated Sub-63 fJ/b 8-Channel 256 Gb/s Optical Transmitter with Autonomous Wavelength Locking in 45 nm CMOS SOI,” IEEE International Solid-State Circuits Conference (ISSCC), paper 12.1 (2024).
  • H. Hao, A. G. Richardson, Y. Ding, L. Du, M. G. Allen, J. Van der Spiegel, and F. Aflatouni, “A 0.4V, 750nW, Individually Accessible Wireless Capacitive Sensor Interface IC for a Tactile Sensing Network,” IEEE International Solid-State Circuits Conference (ISSCC), paper 17.10 (2024).
  • K. Omirzakhov, A. Pirmoradu, H. Hao, and F. Aflatouni, “Monolithic optical PAM-4 transmitter with autonomous carrier tracking,” Optics Express 32 (3), 2894-2905 (2024).
  • Y. Ding, L. Du, H. Hao, T.C.E. Mier, J. Van der Spiegel, T.H. Lucas, F. Aflatouni, AF Richardson, MG Allen, “A biocompatible glass-encapsulated triaxial force sensor for implantable tactile sensing applications,” IEEE International Conference on Micro Electro Mechanical Systems, Austin, TX, M46-f, 2024. 
  • P. Sanjari and F. Aflatouni, “An integrated photonic-assisted phased array transmitter for direct fiber to mm-wave links,” Nature communications 14, 1414 (2023).
  • K. Omirzakhov, M. H. Idjadi, T.Y. Huang, S. A. Breitweiser, D. A. Hopper, L. C. Bassett, and F. Aflatouni, “An integrated reconfigurable spin control system on 180 nm CMOS for diamond NV centers,” in IEEE Transactions on Microwave Theory and Techniques (TMTT), vol. 71, no. 9, pp. 4052-4063 (2023).
  • V. Iyer, D. Issadore, and F. Aflatouni, “The next generation of hybrid microfluidic/integrated circuit chips: recent and upcoming advances in high-speed, high-throughput, and multifunctional lab-on-IC systems” Lab on a Chip, DOI:10.1039/d2lc01163h (2023).
  • A. Pirmoradi and F. Aflatouni, “Monolithically integrated autonomous demultiplexers with near zero power consumption for beyond Tb/s links,” Optical Fiber Communication Conference (OFC), paper M3l.2 (2023).
  • F. Ashtiani, A. J. Geers, F Aflatouni, “Direct image classification using an on-chip photonic deep neural network,” Proc. SPIE 12424, Integrated Optics: Devices, Materials, and Technologies XXVII, 124240K (2023).
  • K. Yang, et al., “Optical data transmission using inverse-designed silicon multimode photonic circuits and spectrally flattened microcombs,” Conference on Lasers and Electro-Optics (CLEO), paper STh3J.3 (2023).
  • L. Du, H. Hao, Y. Ding, A. Gabros, T.C.E. Mier, J. Van der Spiegel, T.H. Lucas, F. Aflatouni, A.G. Richardson, M.G. Allen, “An implantable, wireless, battery-free system for tactile pressure sensing,” Microsystems & Nanoengineering 9: 130, 2023.
  • F. Ashtiani, A.G. Geers, and F. Aflatouni, “An on-chip photonic deep neural network for image classification,” Nature 606, 501-506 (2022).
  • H. Hao, H. Liu, J. Van der Spiegel, and f. Aflatouni, “A Wireless Somatosensory Feedback System Using Human Body Communication,” IEEE Journal of Solid State Circuits, vol. 57, no. 3, pp. 869-881, (2022).
  • K.Y. Yang, C. Shirpurkar, A.D. White, J. Zang, L. Chang, F. Ashtiani, M. A. Guidry, D. M. Lukin, S. V. Pericherla, J. Yang, H. Kwon, J. Lu, G. H. Ahn, K. Van Gasse, Y. Jin, S. Yu, T. C. Briles, J. R. Stone, D. R. Carlson, H. Song, K. Zou, H. Zhou, K. Pang, H. Hao, L. Trask, M. Li, A. Netherton, L. Rechtman, J. S. Stone, J. L. Skarda, L. Su, D. Vercruysse, J. W. MacLean, Sh. Aghaeimeibodi, M. Li, D. AB Miller, D. M. Marom, A. E. Willner, J. E. Bowers, S. B. Papp, P. J. Delfyett, F. Aflatouni, J. Vučković “Multi-dimensional data transmission using inverse-designed silicon photonics and microcombs,” Nature Communications 13, 7862 (2022).
  • C. Shirpurkar, J. Zang, K. Y. Yang, D. Carlson, S. P. Yu, E. Lucas, S.V. Pericherla, J. Yang, M. Guidry, D. Lukin, L. Trask, F. Aflatouni, J. Vuckovic, S. B. Papp, and P. J. Delfyett, “Photonic crystal resonators for inverse-designed multi-dimensional optical interconnects,” Optics Letters, vol. 47, no. 12, pp. 3063-3066 (2022).
  • N. Shah, V. Iyer, Z. Zhang, Z. Gao, J. Park, V. Yelleswarapu, F. Aflatouni, C. AT Johnson, and D. Issadore “Highly stable integration of graphene Hall sensors on a microfluidic platform for magnetic sensing in whole blood,” Microsystems & Nanoengineering 9 (1), 71 (2022).
  • K. Omirzakhov, M. H. Idjadi, T. Y. Huang, S. A. Breitweiser, D. A. Hopper, L. C. Bassett, and F. Aflatouni, “An integrated quantum spin control system in 180nm CMOS,” IEEE Radio Frequency Integrated Circuits (RFIC) Conference, paper RMo1C-1 (2022).
  • F. Ashtiani and F. Aflatouni, “2-D optical phased arrays with multilayer antenna elements and off-aperture phase control,” Conference on Lasers and Electro-Optics (CLEO), paper STh2G.2 (2022).
  • K. Y. Yang et al., “Inverse-designed multi-wavelength, multi-mode optical interconnects using soliton microcombs,” Conference on Lasers and Electro-Optics (CLEO), paper STh4F.2 (2022).
  • F. Ashtiani and F. Aflatouni, “Coherent Multilayer Photonic Nanoantenna Array with off-Aperture Phase Adjustment,” ACS Photonics 8, 3433-3439 (2021). Our article appeared on the cover of ACS Photonics.
  • H. Hao, J. Chen, A. G. Richardson, J. Van der Spiegel, and F. Aflatouni, “A 10.8 µW Neural Signal Recorder and Processor with Unsupervised Analog Classifier for Spike Sorting,” IEEE Transactions on Biomedical Circuits and Systems, vol. 15, no. 2, pp. 351-364 (2021).
  • H. Hao, L. Du, A. G. Richardson, TH. Locas, J. Van der Spiegel, M. G. Allen, and F. Aflatouni,”A Wireless Artificial Mechanoreceptor in 180nm CMOS,” IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 6, pp. 2907–2920 (2021).
  • P. Sanjari and F. Aflatouni, “Modulation characteristics of a delay-controlled optoelectronic oscillator,” Conference on Lasers and Electro-Optics (CLEO), paper SW3A.7 (2021).
  • H. Hao, H. Liu, J. Van der Spiegel, and F. Aflatouni “A somatosensory feedback system in 180nm CMOS,” IEEE Custom Integrated Circuits Conference (CICC), pp. 1-2 (2021).
  • T. Huang, D. Hopper, M. H. Idjadi, K. Omirzakhov, S. A. Breitweiser, F. Aflatouni, L. Bassett, “Effects of phase noise in microwave control sequences on spin coherence,” APS Meeting, J31.00005 (2021).
  • K. Yang, A. White, F. Ashtiani, L. Chang, H. Song, K. Zou, H. Zhou, K. Pang, G. Ho Ahn, A. Netherton, J. Lee Skarda, L. Su, D. Vercruysse, JP. MacLean, S. Aghaeimeibodi, A. Willner, J. Bowers, F. Aflatouni, J. Vuckovic, “Inverse-designed optical link for chip-to-chip communication,” Conference on Lasers and Electro-Optics (CLEO), paper SM4C.4 (2021).
  • F. Ashtiani, P. Sanjari, M. H. Idjadi, A. Risi, and F. Aflatouni, “Photonic-electronic co-design: from optical phase control to signal processing,” in Photonics in Switching and Computing, paper Tu3A-2 (2021).
  • M. Idjadi and F. Aflatouni, “Nanophotonic phase noise filter in silicon,” Nature Photonics 14, pp. 234–239 (2020).
  • Z. Xuan, and F. Aflatouni, “Integrated coherent optical receiver with feed-forward carrier recovery,” Optics Express, vol. 28, no. 11, pp. 16073-16088 (2020).
  • P. Sanjari and F. Aflatouni, “Wideband rapidly tunable optical delay line for integrated opto-electronic oscillators,” accepted for publication in IEEE Photonics Journal (2020).
  • H. Hao, L. Du, A. G. Richardson, T. H. Lucas, M. G. Allen, J. Van der Spiegel, and F. Aflatouni “A hybrid-integrated artificial mechanoreceptor in 180nm CMOS,” IEEE Radio Frequency Integrated Circuits (RFIC) Conference, paper RMo3A-3 (2020). Best Student Paper Award – 1st Place.
  • F. Ashtiani, A. Risi, and F. Aflatouni, “Photonic assisted microwave near-field imager,” Conference on Lasers and Electro-Optics (CLEO), paper SW3O.5 (2020). Highlighted Talk.
  • F. Ashtiani and F. Aflatouni, “Optical beam-steering using an NxN optical phased arrays with 2N phase shifters,” Conference on Lasers and Electro-Optics (CLEO), paper SM1O.1 (2020).
  • M. Idjadi, Sh. Arab, and F. Aflatouni, “Optical frequency comb generation in silicon by recursive electro-optic modulation,” Conference on Lasers and Electro-Optics (CLEO), paper SF3O.5 (2020).
  • F. Ashtiani, Angelina Risi, and F. Aflatouni, “Single-chip nanophotonic near-field imager,” Optica, vol. 6, no. 10, pp. 1255-1260 (2019). Our article made the cover page of this issue of Optica.
  • F. Ashtiani and F. Aflatouni, “NxN optical phased array with 2N phase shifters,” Optics Express, vol. 27, no. 19, pp. 27183-27190 (2019).
  • A.G. Richardson, Y. Ghenbot, X. Liu, H. Hao, C. Rinehart, S. DeLuccia, S. T.Maldonado, G. Boyek, M. Zhang, F. Aflatouni, J. Van der Spiegel, T. H. Lucas, “Learning active sensing strategies using a sensory brain–machine interface,” PNAS, 201909953; DOI:10.1073/pnas.1909953116 (2019).
  • Z. Xuan, L. Du, and F. Aflatouni, “Frequency locking of semiconductor lasers to RF oscillators using hybrid-integrated opto-electronic oscillators with dispersive delay lines,” Optics Express, vol. 27, no. 8, pp. 10729-10737 (2019).
  • M. H. Idjadi and F. Aflatouni, “Laser spectral linewidth reduction using integrated Pound-Drever Hall laser stabilization system in 180nm CMOS SOI,” in proceedings of IEEE Radio Frequency Integrated Circuits (RFIC), paper RTUIF1-4 (2019).
  • F. Aflatouni, “On-chip laser phase and frequency control,” OSA Laser Congress, paper LTh2B.1 (invited), Austria (2019).
  • F. Ashtiani, P. Sanjari, M. H. Idjadi and F. Aflatouni, “High-resolution optical frequency synthesis using an integrated electro-optical phase-locked loop,” in IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 12, pp. 5922-5932 (2018).
  • Z. Xuan, R. Ding, Y. Liu, T. Baehr-Jones, M. Hochberg, and F. Aflatouni, “A low-power hybrid-integrated 40 Gb/s optical receiver in silicon,” IEEE Transactions on Microwave Theory and Techniques (TMTT), vol. 66, no. 1, pp. 589-595 (2018).
  • F. Aflatouni, “Relative and absolute phase control of lasers,” International Conference on Metamaterials, Photonic Crystals and Plasmonics (META), paper 2A59.4 (invited), Lisbon (2019).
  • Zhe Xuan, Lixiong Du, and Firooz Aflatouni, “Direct frequency locking of lasers to RF oscillators,” in proceedings of IEEE Optical Interconnects Conference (OI), paper TuA3 (2018).
  • M. Idjadi and F. Aflatouni, “Integrated Pound-Drever Hall laser stabilization system in a standard CMOS SOI process,” in proceedings of Conference on Lasers and Electro-Optics (CLEO), paper SM3L.2 (2018).
  • F. Ashtiani, P. Sanjari, M. Idjadi, and F. Aflatouni, “Towards integrated wideband high resolution optical synthesizers,” in proceedings of IEEE International Microwave Symposium (IMS), paper Th2E-3 (2018).
  • M. Idjadi and F. Aflatouni, “Integrated Pound-Drever Hall laser stabilization system in silicon,” Nature Communications 8, 1209 (2017).
  • F. Ashtiani and F. Aflatouni, “An integrated electro-optical phase locked loop for highly tunable high resolution optical synthesis,” Optics Express, vol. 24, no. 14, pp. 16171-16181 (2017).
  • B. Abiri, F. Aflatouni, and A. Hajimiri, “Self-equalizing photodiodes, a hybrid electro-optical approach to tackle bandwidth limitation in high-speed signaling,” Optics Express, vol. 25, no. 16, pp. 19137-19146 (2017).
  • M. Bagheri, G. D. Spiers, C. Frez, S. Forouhar, and F. Aflatouni, “Linewidth measurement of distributed-feedback semiconductor lasers operating near 2.05 µm”, IEEE Photonic Technology Letters, vol. 27, no. 18, pp. 1934-1937 (2015).
  • F. Aflatouni, B. Abiri, A. Rekhi, and A. Hajimiri, “Nanophotonic coherent imager,” Optics Express, vol. 23, no. 4, pp. 5117-5125 (2015).
  • F. Aflatouni, B. Abiri, A. Rekhi, and A. Hajimiri, “Nanophotonic projection system,” Optics Express, vol. 23, no. 16, pp. 21012-21022 (2015).
  • Z. Xuan, R. Ding, Y. Liu, T. Baehr-Jones, M. Hochberg, and F. Aflatouni, “A low-power 40 Gb/s optical receiver in silicon,” in proceedings of IEEE Radio Frequency Integrated Circuits (RFIC), paper RTU-1-D-4 (2015).
  • B. Abiri, A. Zhou, F. Aflatouni, and A. Hajimiri, “An adjustable self-equalizing photo detector,” Optical Fiber Communication Conference (OFC), pp. W3A-3 (2015).
  • B. Abiri, F. Aflatouni, and A. Hajimiri, “A self-equalizing photo-detector” IEEE Photonic Conference (IPC), pp. 196-197 (2014).
  • B. Abiri, F. Aflatouni, A. Rekhi, and A. Hajimiri, “Electronic two-dimensional beam steering for integrated optical phased arrays,” in Optical Fiber Communication Conference (OFC) Dig. Papers, no. M2K (2014).
  • S. Bowers, B. Abiri, F. Aflatouni, and A. Hajimiri, “A compact optically driven travelling-wave radiating source,” in Optical Fiber Communication Conference (OFC) Dig. Papers, no. Tu2A (2014).
  • F. Aflatouni, B. Abiri, A. Rekhi, H. Abediasl, H. Hashemi, and A. Hajimiri, “Electronic laser phase noise reduction,” in IEEE Radio Frequency Integrated Circuits Symposium (RFIC) Dig. Papers, pp. 265-268 (2013).
  • F. Aflatouni and H. Hashemi, “Wideband tunable laser phase noise reduction using single side-band modulation in an electro-optical feed-forward scheme,” Optics Letters, vol. 37, no. 2 (2012).
  • F. Aflatouni, M. Bagheri, and H. Hashemi, “Design methodology and architectures to reduce the semiconductor laser phase noise using electrical feed-forward schemes,” IEEE Transactions on Microwave Theory and Techniques, vol. 58, no. 11, pp. 3290-3303 (2010).
  • F. Aflatouni and H. Hashemi, “An electronically controlled optical phased array,” in IEEE International Microwave Symposium (IMS) Dig. Papers, WEPN-6 (2012).
  • F. Aflatouni and H. Hashemi, “Light source independent linewidth reduction of lasers,” in Optical Fiber Communication Conference (OFC) Dig. Papers, no. OW1G.6 (2012).
  • M. Bagheri, F. Aflatouni, A. Imani, A. Goel, and H. Hashemi, “Semiconductor laser phase noise cancellation using an electrical feed-forward scheme,” Optics Letters, vol. 34, no. 19, pp. 2979-2981 (2009).
  • F. Aflatouni and H. Hashemi, “A low power Ka-Band receiver front-end in 0.13m SiGe BiCMOS for space transponders,” in IEEE Compound Semiconductor IC Symposium Dig. Papers, pp. 1-4 (2009) (Recipient of the 2010 NASA Tech Award).
  • F. Aflatouni and H. Hashemi, “A 1.8mW wideband 57dB transimpedance amplifier in 0.13m CMOS,” in IEEE Radio Frequency Integrated Circuits Symposium Dig. Papers, pp. 57-60 (2009).
  • N. Satyan, W. Liang, F. Aflatouni, A. Yariv, A. Kewitsch, G. Rakuljic, and H. Hashemi, “Phase-controlled apertures using heterodyne optical phase-locked loops,” IEEE Photonics Technology Letters, vol. 20, no. 11 (2008).
  • N. Satyan, W. Liang, F. Aflatouni, A. Yariv, A. Kewitsch, G. Rakuljic, and H. Hashemi, “Applications of optical phase locked loops in coherent beam combining,” in Proceedings of SPIE, vol. 6873 (2008).
  • W. Liang, N. Satyan, F. Aflatouni, A. Yariv, A. Kewitsch, G. Rakuljic, and H. Hashemi, “Coherent beam combining with multi-level optical phase lock loops,” Journal of Optical Society of America B, vol. 24, no. 12, pp. 2930-2939 (2007).
  • W. Liang, N. Satyan, A. Yariv, A. Kewitsch, G. Rakuljic, F. Aflatouni, H. Hashemi, and J. Ungar, “Coherent power combination of two master-oscillator-power-amplifier (MOPA) semiconductor lasers using optical phase lock loops,” Optics Express, vol. 15, no. 6, pp. 3201-3205 (2007).
  • F. Aflatouni, O. Momeni, and H. Hashemi, “A heterodyne phase locked loop with GHz acquisition range for coherent locking of semiconductor lasers,” in Proceedings of the IEEE Custom Integrated Circuit Conference, pp. 463-466 (2007).

Patents

  • F. Ashtiani and F. Aflatouni, “Photonic assisted ultra-wideband (UWB) imager”, US Patent No. 11,567,189 (2023).
  • X. Du, M. H. Idjadi, Y. Ding, T. Zhang, A.J. Geers, J. B. Pyo, F. Aflatouni, M. Allen, and T. Olsson “Zero static power, frequency, tunable magnetic wave filter” US Patent Application No. 63/490.821 (2023).
  • F. Aflatouni, and A. Hajimiri, “Integrated optical phased arrays with optically enhanced elements”, US Patent No. 11,249,369 (2022).
  • F. Ashtiani and F. Aflatouni, “Photonic mm-wave assisted deep neural networks”, World Publication No. WO2022020437A1 (2022).
  • Zhe Xuan and Firooz Aflatouni, “Integrated coherent receiver with off PLL bandwidth demodulation,” US Patent Publication No. 17/698-260 (2022).
  • F. Aflatouni, M. G. Allen, TH. Lucas, A. G. Richardson, “Implantable foot sensory system,” World Patent Organization PCT Patent Application No. PCT/US2022/017258 (2022).
  • 4. TH. Lucas, A. G. Richardson, F. Aflatouni, M. G. Allen, “An implantable wireless finger sensor to restore sensation following paralysis,” U.S. Provisional Patent Application No. 63/217,939 (2021).
  • 3. TH. Lucas, A. G. Richardson, F. Aflatouni, M. G. Allen “Implantable foot sensory system to restore sensation and reduce pain in diabetic peripheral neuropathy,” U.S. Patent Application No. 63/152,074. (2021).
  • M. Idjadi and F. Aflatouni, “Integrated Pound-Drever-Hall laser stabilization system”, US Patent No. 10,700,492 (2020).
  • A. Hajimiri and F. Aflatouni, “Thermally enhanced fast optical phase shifters”, US patent No. 10,795,188 (2020).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Integrated planar two-dimensional optical phased array,” U.S. Patent No.10,634,845 (2020).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Coherent camera,” US Patent No. 10,848,739(2020).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Optically assisted electrical filtering and processing,” US Patent No. 9,900,096 (2018).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Amplification-free electro-optical oscillator”, US Patent No. 9,768,873 (2017).
  • B. Abiri, F. Aflatouni, and A. Hajimiri, “Self-equalizing photo-detector,” US Patent No. 9,831,957 (2017).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Optically balanced opto-electronic oscillators,” US Patent No. 9,831,951 (2017).
  • B. Abiri, F. Aflatouni, and A. Hajimiri, “Integrated wide target range optical coupling based Mach-Zehnder sensor,” U.S. Patent No. 9,523,639 (2017).
  • S. Bowers, F. Aflatouni, B. Abiri, and A. Hajimiri, “Optically driven active radiator,” US Patent No. 9,621,269 (2017).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Integrated light source independent linewidth reduction of lasers,” U.S. Patent No. 9,482,886 (2016).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Integrated light source independent linewidth reduction of lasers using electro-optical feedback techniques,” U.S. Patent No. 9,250,453 (2016).
  • F. Aflatouni, B. Abiri, and A. Hajimiri, “Integrated optical phased arrays,” US Patent No. 9,124,373 (2015).