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Nathan Youngblood

Assistant Professor
Personal Website Google Scholar Electrical and Computer Engineering

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PhD, Electrical and Computer Engineering, University of Minnesota, 2012 - 2016

MSc, Electrical and Computer Engineering, University of Minnesota, 2012 - 2015

BS, Physics, Bethel University, 2007 - 2011

Feldmann, J., Youngblood, N., Karpov, M., Gehring, H., Li, X., Stappers, M., Le Gallo, M., Fu, X., Lukashchuk, A., Raja, A.S., Liu, J., Wright, C.D., Sebastian, A., Kippenberg, T.J., Pernice, W.H.P., & Bhaskaran, H. (2021). Parallel convolutional processing using an integrated photonic tensor core. NATURE, 589(7840), 52-+.Springer Science and Business Media LLC. doi: 10.1038/s41586-020-03070-1.

Feldmann, J., Youngblood, N., Karpov, M., Gehring, H., Li, X., Stappers, M., Le Gallo, M., Fu, X., Lukashchuk, A., Raja, A.S., Liu, J., Wright, C.D., Sebastian, A., Kippenberg, T.J., Pernice, W.H.P., & Bhaskaran, H. (2021). Parallel convolutional processing using an integrated photonic tensor core (vol 589, pg 52, 2021). NATURE, 591(7849), E13.Springer Science and Business Media LLC. doi: 10.1038/s41586-021-03216-9.

Ma, X., Youngblood, N., Liu, X., Cheng, Y., Cunha, P., Kudtarkar, K., Wang, X., & Lan, S. (2021). Engineering photonic environments for two-dimensional materials. NANOPHOTONICS, 10(3), 1031-1058.Walter de Gruyter GmbH. doi: 10.1515/nanoph-2020-0524.

Feldmann, J., Youngblood, N., Li, X., Wright, C.D., Bhaskaran, H., & Pernice, W.H.P. (2020). Integrated 256 Cell Photonic Phase-Change Memory With 512-Bit Capacity. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 26(2), 1-7.Institute of Electrical and Electronics Engineers (IEEE). doi: 10.1109/JSTQE.2019.2956871.

He, Q., Youngblood, N., Cheng, Z., Miao, X., & Bhaskaran, H. (2020). Dynamically tunable transmissive color filters using ultra-thin phase change materials. OPTICS EXPRESS, 28(26), 39841-39849.The Optical Society. doi: 10.1364/OE.411874.

Li, X., Youngblood, N., Cheng, Z., Carrillo, S.G.C., Gemo, E., Pernice, W.H.P., Wright, C.D., & Bhaskaran, H. (2020). Experimental investigation of silicon and silicon nitride platforms for phase-change photonic in-memory computing. OPTICA, 7(3), 218-225.The Optical Society. doi: 10.1364/OPTICA.379228.

Li, X., Youngblood, N., Cheng, Z., Carrillo, S.G.C., Gemo, E., Pernice, W.H.P., Wright, C.D., & Bhaskaran, H. (2020). Experimental investigation of silicon and silicon nitride platforms for phase-change photonic in-memory computing: erratum. Optica, 7(12), 1804.The Optical Society. doi: 10.1364/optica.414370.

Shen, Y., Yang, X., Naidoo, D., Fu, X., & Forbes, A. (2020). Structured ray-wave vector vortex beams in multiple degrees of freedom from a laser: erratum. Optica, 7(12), 1705.The Optical Society. doi: 10.1364/optica.414397.

Carrillo, S.G.C., Gemo, E., Li, X., Youngblood, N., Katumba, A., Bienstman, P., Pernice, W., Bhaskaran, H., & Wright, C.D. (2019). Behavioral modeling of integrated phase-change photonic devices for neuromorphic computing applications. APL MATERIALS, 7(9), 091113.AIP Publishing. doi: 10.1063/1.5111840.

Farmakidis, N., Youngblood, N., Li, X., Tan, J., Swett, J.L., Cheng, Z., Wright, C.D., Pernice, W.H.P., & Bhaskaran, H. (2019). Plasmonic nanogap enhanced phase-change devices with dual electrical-optical functionality. SCIENCE ADVANCES, 5(11), eaaw2687.American Association for the Advancement of Science (AAAS). doi: 10.1126/sciadv.aaw2687.

Feldmann, J., Youngblood, N., Wright, C.D., Bhaskaran, H., & Pernice, W.H.P. (2019). All-optical spiking neurosynaptic networks with self-learning capabilities. NATURE, 569(7755), 208-+.Springer Science and Business Media LLC. doi: 10.1038/s41586-019-1157-8.

Gemo, E., Carrillo, S.G.C., DeGalarreta, C.R., Baldycheva, A., Hayat, H., Youngblood, N., Bhaskaran, H., Pernice, W.H.P., & Wright, C.D. (2019). Plasmonically-enhanced all-optical integrated phase-change memory. OPTICS EXPRESS, 27(17), 24724-+.The Optical Society. doi: 10.1364/OE.27.024724.

Li, X., Youngblood, N., Rios, C., Cheng, Z., Wright, C.D., Pernice, W.H.P., & Bhaskaran, H. (2019). Fast and reliable storage using a 5 bit, nonvolatile photonic memory cell. OPTICA, 6(1), 1-6.The Optical Society. doi: 10.1364/OPTICA.6.000001.

Rios, C., Youngblood, N., Cheng, Z., Le Gallo, M., Pernice, W.H.P., Wright, C.D., Sebastian, A., & Bhaskaran, H. (2019). In-memory computing on a photonic platform. SCIENCE ADVANCES, 5(2), eaau5759.American Association for the Advancement of Science (AAAS). doi: 10.1126/sciadv.aau5759.

Sarwat, S.G., Cheng, Z., Youngblood, N., Alias, M.S., Sinha, S., Warner, J., & Bhaskaran, H. (2019). Strong Opto-Structural Coupling in Low Dimensional GeSe3 Films. NANO LETTERS, 19(10), 7377-7384.American Chemical Society (ACS). doi: 10.1021/acs.nanolett.9b03039.

Youngblood, N., Rios, C., Gemo, E., Feldmann, J., Cheng, Z., Baldycheva, A., Pernice, W.H.P., Wright, C.D., & Bhaskaran, H. (2019). Tunable Volatility of Ge2Sb2Te5 in Integrated Photonics. ADVANCED FUNCTIONAL MATERIALS, 29(11), 1807571.Wiley. doi: 10.1002/adfm.201807571.

Cheng, Z., Rios, C., Youngblood, N., Wright, C.D., Pernice, W.H.P., & Bhaskaran, H. (2018). Device-Level Photonic Memories and Logic Applications Using Phase-Change Materials. ADVANCED MATERIALS, 30(32), e1802435.Wiley. doi: 10.1002/adma.201802435.

Rios, C., Stegmaier, M., Cheng, Z., Youngblood, N., Wright, C.D., Pernice, W.H.P., & Bhaskaran, H. (2018). Controlled switching of phase-change materials by evanescent-field coupling in integrated photonics. OPTICAL MATERIALS EXPRESS, 8(9), 2455-2470.The Optical Society. doi: 10.1364/OME.8.002455.

Sarwat, S.G., Youngblood, N., Au, Y.Y., Mol, J.A., Wright, C.D., & Bhaskaran, H. (2018). Engineering Interface-Dependent Photoconductivity in Ge2Sb2Te5 Nanoscale Devices. ACS APPLIED MATERIALS & INTERFACES, 10(51), 44906-44914.American Chemical Society (ACS). doi: 10.1021/acsami.8b17602.

Chen, C., Youngblood, N., Peng, R., Yoo, D., Mohr, D.A., Johnson, T.W., Oh, S.H., & Li, M. (2017). Three-Dimensional Integration of Black Phosphorus Photodetector with Silicon Photonics and Nanoplasmonics. NANO LETTERS, 17(2), 985-991.American Chemical Society (ACS). doi: 10.1021/acs.nanolett.6b04332.

Peng, R., Khaliji, K., Youngblood, N., Grassi, R., Low, T., & Li, M. (2017). Midinfrared Electro-optic Modulation in Few-Layer Black Phosphorus. NANO LETTERS, 17(10), 6315-6320.American Chemical Society (ACS). doi: 10.1021/acs.nanolett.7b03050.

Xu, M., Gu, Y., Peng, R., Youngblood, N., & Li, M. (2017). Black phosphorus mid-infrared photodetectors. APPLIED PHYSICS B-LASERS AND OPTICS, 123(4).Springer Science and Business Media LLC. doi: 10.1007/s00340-017-6698-7.

Youngblood, N., & Li, M. (2017). Ultrafast photocurrent measurements of a black phosphorus photodetector. APPLIED PHYSICS LETTERS, 110(5), 051102.AIP Publishing. doi: 10.1063/1.4975360.

Youngblood, N., & Li, M. (2017). Integration of 2D materials on a silicon photonics platform for optoelectronics applications. NANOPHOTONICS, 6(6), 1205-1218.Walter de Gruyter GmbH. doi: 10.1515/nanoph-2016-0155.

Youngblood, N., Peng, R., Nemilentsau, A., Low, T., & Li, M. (2017). Layer-Tunable Third-Harmonic Generation in Multilayer Black Phosphorus. ACS PHOTONICS, 4(1), 8-14.American Chemical Society (ACS). doi: 10.1021/acsphotonics.6b00639.

Lee, S.C., Youngblood, N., Jiang, Y.B., Peterson, E.J., Stark, C.J.M., Detchprohm, T., Wetzel, C., & Brueck, S.R.J. (2015). Incorporation of indium on cubic GaN epitaxially induced on a nanofaceted Si(001) substrate by phase transition. APPLIED PHYSICS LETTERS, 107(23), 231905.AIP Publishing. doi: 10.1063/1.4936772.

Youngblood, N., Chen, C., Koester, S.J., & Li, M. (2015). Waveguide-integrated black phosphorus photodetector with high responsivity and low dark current. NATURE PHOTONICS, 9(4), 247-252.Springer Science and Business Media LLC. doi: 10.1038/NPHOTON.2015.23.

Youngblood, N., Anugrah, Y., Ma, R., Koester, S.J., & Li, M. (2014). Multifunctional Graphene Optical Modulator and Photodetector Integrated on Silicon Waveguides. NANO LETTERS, 14(5), 2741-2746.American Chemical Society (ACS). doi: 10.1021/nl500712u.

Li, X., Youngblood, N., Wright, C.D., Pernice, W.H.P., & Bhaskaran, H. Non-volatile silicon photonic memory with more than 4-bit per cell capability.

Youngblood, N., Talagrand, C., Porter, B., Galante, C.G., Kneepkens, S., Sarwat, S.G., Yarmolich, D., Bonilla, R.S., Hosseini, P., Taylor, R., & Bhaskaran, H. Broadly-tunable smart glazing using an ultra-thin phase-change material.

Gemo, E., García-Cuevas Carrillo, S., Faneca, J., Ruíz de Galarreta, C., Hayat, H., Youngblood, N., Baldycheva, A., Pernice, W.H.P., Bhaskaran, H., & Wright, C.D. (2020). Sub-wavelength plasmonic-enhanced phase-change memory. In Photonic and Phononic Properties of Engineered Nanostructures X, 11289.SPIE. doi: 10.1117/12.2546031.

Li, X., Youngblood, N., Zhou, W., Feldmann, J., Swett, J., Aggarwal, S., Sebastian, A., Wright, C.D., Pernice, W., & Bhaskaran, H. (2020). On-chip Phase Change Optical Matrix Multiplication Core. In 2020 IEEE International Electron Devices Meeting (IEDM), 2020-December, (pp. 7.5.1-7.5.4).IEEE. doi: 10.1109/iedm13553.2020.9372052.

Youngblood, N., Farmakidis, N., Li, X., & Bhaskaran, H. (2020). Nanoscale Optoelectronic Memory with Nonvolatile Phase-Change Photonics. In Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, 2020-May.

Zokaee, F., Lou, Q., Youngblood, N., Liu, W., Xie, Y., & Jiang, L. (2020). LightBulb: A Photonic-Nonvolatile-Memory-based Accelerator for Binarized Convolutional Neural Networks. In 2020 Design, Automation & Test in Europe Conference & Exhibition (DATE), (pp. 1438-1443).IEEE. doi: 10.23919/date48585.2020.9116494.

David Wright, C., Bhaskaran, H., Wolfram, H.P.P., Carrillo, S.G.C., Gemo, E., Baldycheva, A., Cheng, Z., Li, X., Rios, C., Youngblood, N., Feldmann, J., Gruhler, N., & Stegmaier, M. (2019). Integrated Phase-change Photonics: A strategy for merging communication and computing. In Optics InfoBase Conference Papers, Part F160-OFC 2019.

Rios, C., Youngblood, N., Cheng, Z., Gallo, M.L., Pernice, W.H.P., Wright, C., Sebastian, A., & Bhaskaran, H. (2019). All-Photonic in-Memory Computing Based on Phase-Change Materials. In 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings. doi: 10.23919/CLEO.2019.8749826.

Ríos, C., Youngblood, N., Cheng, Z., Le Gallo, M., Pernice, W.H.P., Wright, C.D., Sebastian, A., & Bhaskaran, H. (2019). All-photonic in-memory computing based on phase-change materials. In Conference on Lasers and Electro-Optics, Part F129-CLEO_SI 2019.OSA. doi: 10.1364/cleo_si.2019.sm2j.2.

Wright, C.D., Bhaskaran, H., Pernice, W.H.P., Carrillo, S.G.C., Gemo, E., Baldycheva, A., Cheng, Z., Li, X., Rios, C., Youngblood, N., Feldmann, J., Gruhler, N., & Stegmaier, M. (2019). Integrated Phase-change Photonics: A Strategy for Merging Communication and Computing. In Optical Fiber Communication Conference (OFC) 2019.OSA. doi: 10.1364/ofc.2019.m1d.3.

Bhaskaran, H., Cheng, Z., Rios, C.A., Youngblood, N., Wright, C.D., & Pernice, W.H. (2017). On-chip phase-change photonic memory and computing. In Active Photonic Platforms IX, 10345.SPIE. doi: 10.1117/12.2272127.

Chen, C., Yoo, D., Youngblood, N., Oh, S.H., & Li, M. (2017). Mid-Infrared Plasmonic Coaxial Nanorings for Surface Enhanced Infrared Absorption (SEIRA) Spectroscopy. In Conference on Lasers and Electro-Optics, 2017-January, (pp. 1-2).OSA. doi: 10.1364/cleo_at.2017.jth2a.36.

Peng, R., Youngblood, N., & Li, M. (2017). Mid-Infrared Electro-Optic Modulation in Black Phosphorus. In Conference on Lasers and Electro-Optics, 2017-January, (pp. 1-2).OSA. doi: 10.1364/cleo_qels.2017.fw4h.7.

Chen, C., Youngblood, N., Mohr, D., Yoo, D., Johnson, T., Peng, R., Oh, S.H., & Li, M. (2016). Black Phosphorus Photodetector on Silicon Photonic and Plasmonic Hybrid Platform. In Conference on Lasers and Electro-Optics.OSA. doi: 10.1364/cleo_si.2016.sm4e.6.

Youngblood, N., & Li, M. (2016). Ultrafast Photocurrent Spectroscopy in a Black Phosphorus Van der Waals Heterostructure. In Conference on Lasers and Electro-Optics.OSA. doi: 10.1364/cleo_si.2016.stu1r.4.

Youngblood, N., Peng, R., Nemilentsau, A., Low, T., & Li, M. (2016). Thickness dependent third-harmonic generation in few-layer black phosphorus. In Conference on Lasers and Electro-Optics.OSA. doi: 10.1364/cleo_at.2016.jth4c.9.

Chen, C., Youngblood, N., & Li, M. (2015). Study of black phosphorus anisotropy on silicon photonic waveguide. In 2015 Optoelectronics Global Conference (OGC).IEEE. doi: 10.1109/ogc.2015.7336864.

Youngblood, N., Chen, C., Koester, S.J., & Li, M. (2015). A Black Phosphorus FET Integrated on a Silicon Waveguide for High Speed, Low Dark Current Photodetection. In CLEO: 2015, 2015-August.OSA. doi: 10.1364/cleo_si.2015.sm3g.3.

Youngblood, N., Chen, C., Koester, S.J., & Li, M. (2015). A black phosphorus FET integrated on a silicon waveguide for high speed, low dark current photodetection. In CLEO: Science and Innovations, CLEO-SI 2015, (p. 2267). doi: 10.1364/CLEO_SI.2015.SM3G.3.

Youngblood, N., Anugrah, Y., Ma, R., Koester, S., & Li, M. (2014). Simultaneous optical modulation and detection using graphene integrated on a silicon waveguide. In CLEO: 2014, 2014-January.OSA. doi: 10.1364/cleo_si.2014.sth1m.3.

Youngblood, N., Anugrah, Y., Ma, R., Koester, S.J., & Li, M. (2014). Simultaneous optical modulation and detection using graphene integrated on a silicon waveguide. In Optics InfoBase Conference Papers.

Research interests

2D materials and devices
In-memory computing
Machine learning
Phase-change photonics
Silicon photonics