Ahmed Y. Alyamani

Director and PI

Ahmed Alyamani received his Ph.D. degree in Physics from University of Sheffield, UK for the work on Strong Coupling in GaN based Micro-Cavities. Alyamani was also member of the Strategic Plan Committee of Nanotechnology and advanced Materials Programs in Saudi Arabia. Alyamani current interests include growth, fabrication, and characterization of wide band gap semiconductors, including ZnO, In2O3 ..etc for LED, LD and photovoltaic applications. Alyamani has authored or co-authored different articles published in international peer-reviewed Journals.

Publications
  • Alias, Mohd Sharizal, Janjua, Bilal, Zhao, Chao,Priante, Davide, Alhamoud, Abdullah A., Tangi, Malleswararao, Alanazi, Lafi M., Alatawi, Abdullah A., Albadri, Abdulrahman M., Alyamani, Ahmed Y., Tien Khee Ng, Ooi, Boon S. ‘Enhancing the Light-Extraction Efficiency of an AlGaN Nanowire Ultraviolet Light-Emitting Diode by Using Nitride/Air Distributed Bragg Reflector Nanogratings’. IEEE PHOTONICS JOURNAL., Volume: 9 Issue: 5, Article Number: 4900508, 2017.
  • Janjua, B., Sun, H., Zhao, C., Anjum, D. H., Wu, F., Alhamoud, A. A., Li, X., Albadri, A. M., Alyamani, A. Y., El-Desouki, M. M., Ng, T. K., Ooi, B. S. ‘Self-planarized quantum-disks-in-nanowires ultraviolet-B emitters utilizing pendeo-epitaxy’. NANOSCALE, Volume: 9 Issue: 23 Pages: 7805-7813, 2017.
  • Di, Dawei, Yang, Le, Richter, Johannes M., Meraldi, Lorenzo, Altamimi, Rashid M., Alyamani, Ahmed Y., Credgington, Dan, Musselman, Kevin P., MacManus-Driscoll, Judith L., Friend, Richard H. ‘Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light-Emitting Diodes’, ADVANCED MATERIALS, Volume: 29 Issue: 13, Article Number: 1605987, 2017.
  • Prabaswara, Aditya, Stowe, David J., Janjua, Bilal, Ng, Tien Khee, Anjum, Dalaver H., Longo, Paolo, Zhao, Chao, Elafandy, Rami T., Li, Xiaohang, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooia, Boon S. ‘Spatially resolved investigation of competing nanocluster emission in quantum-disks-in-nanowires structure characterized by nanoscale cathodoluminescence’, JOURNAL OF NANOPHOTONICS, Volume: 11 Issue: 2, 2017.
  • Janjua, Bilal, Sun, Haiding, Zhao, Chao, Anjum, Dalaver H., Priante, Davide, Alhamoud, Abdullah A., Wu, Feng, Li, Xiaohang, Albadri, Abdulrahman M., Alyamani, Ahmed Y., El-Desouki, Munir M., Ng, Tien Khee, Ooi, Boon S. ‘Droop-free AlxGa1-xN/AlyGa1-yN quantum-disks-in-nanowires ultraviolet LED emitting at 337 nm on metal/silicon substrates’, OPTICS EXPRESS, Volume: 25 Issue: 2 Pages: 1381-1390, 2017.
  • Shen, Chao, Ng, Tien Khee, Lee, Changmin, Leonard, John T., Nakamura, Shuji, Speck, James S., Denbaars, Steven P., Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S. ‘Semipolar InGaN-based superluminescent diodes for solid-state lighting and visible light communications’, GALLIUM NITRIDE MATERIALS AND DEVICES XII , Proceedings of SPIE, Volume: 10104, Article Number: UNSP 101041U-1, 2017.
  • Zhao, Chao, Ng, Tien Khee, Tseng, Chien-Chih, Li, Jun, Shi, Yumeng, Wei, Nini, Zhang, Daliang, Consiglio, Giuseppe Bernardo, Prabaswara, Aditya, Alhamoud, Abdullah Ali, Albadri, Abdulrahman M., Alyamani, Ahmed Y., Zhang, X. X., Li, Lain-Jong, Ooi, Boon S., ‘InGaN/GaN nanowires epitaxy on large-area MoS2 for high-performance light-emitters’, RSC ADVANCES, Volume: 7 Issue: 43 Pages: 26665-26672, 2017.
  • Salhi, A., Alshaibani, S., Alhamdan, M., Albrithen, H., Alyamani, A., El-Desouki, M. ‘Effects of Sb incorporation in GaAsSb-capping layer on the optical properties of InAs/GaAs QDs grown by Molecular Beam Epitaxy’, SUPERLATTICES AND MICROSTRUCTURES, Volume: 101 Pages: 138-143, 2017.
  • Janjua, Bilal, Ng, Tien Khee, Zhao, Chao, Prabaswara, Aditya, Consiglio, Giuseppe Bernardo, Priante, Davide, Shen, Chao, Elafandy, Rami T., Anjum, Dalaver H., Alhamoud, Abdullah A., Alatawi, Abdullah A., Yang, Yang, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S. ‘True Yellow Light-Emitting Diodes as Phosphor for Tunable Color-Rendering Index Laser-Based White Light’, ACS PHOTONICS, Volume: 3 Issue: 11 Pages: 2089-2095, 2016.
  • Shen, Cha, Lee, Changmin, Ng, Tien Khee, Nakamura, Shuji, Speck, James S., DenBaars, Steven P., Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S. ‘High-speed 405-nm superluminescent diode (SLD) with 807-MHz modulation bandwidth’, OPTICS EXPRESS, Volume: 24 Issue: 18 Pages: 20281-20286, 2016.
  • Janjua, Bilal, Ng, Tien Khee, Zhao, Chao, Oubei, Hassan Makine, Shen, Chao, Prabaswara, Aditya, Alias, Mohd Sharizal, Alhamoud, Abdullah Ali, Alatawi, Abdullah Awaad, Albadri, Abdulrahman M., Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S. ‘Ultrabroad linewidth orange-emitting nanowires LED for high CRI laser-based white lighting and gigahertz communications’, OPTICS EXPRESS, Volume: 24 Issue: 17 Pages: 19228-19236, 2016.
  • Tangi, Malleswararao, Mishra, Pawan, Janjua, Bilal. Ng, Tien Khee, Anjum, Dalaver H., Prabaswara, Aditya, Yang, Yang, Albadri, Abdulrahman M., Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘Bandgap measurements and the peculiar splitting of E-2(H) phonon modes of InxAl1-xN nanowires grown by plasma assisted molecular beam epitaxy’., JOURNAL OF APPLIED PHYSICS, Volume: 120 Issue: 4, Article Number: 045701, 2016.
  • Zhao, Chao, Ng, Tien Khee, ElAfandy, Rami T., Prabaswara, Aditya, Consiglio, Giuseppe Bernardo, Ajia, Idris A., Roqan, Iman S., Janjua, Bilal, Shen, Chao, Eid, Jessica, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘Droop-Free, Reliable, and High-Power InGaN/GaN Nanowire Light Emitting Diodes for Monolithic Metal-Optoelectronics’, NANO LETTERS, Volume: 16 Issue: 7 Pages: 4616-4623, 2016.
  • Mishra, Pawan, Janjua, Bilal, Ng, Tien Khee, Anjum, Dalaver H., Elafandy, Rami T., Prabaswara, Aditya, Shen, Chao, Salhi, Abdelmajid, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘On the optical and microstrain analysis of graded InGaN/GaN MQWs based on plasma assisted molecular beam epitaxy’, OPTICAL MATERIALS EXPRESS, Volume: 6 Issue: 6 Pages: 2052-2062, 2016.
  • Shen, Chao, Ng, Tien Khee, Leonard, John T., Pourhashemi, Arash, Nakamura, Shuji, DenBaars, Steven P., Speck, James S., Alyamani, Ahmed Y., El-desouki, Munir M., Ooi, Boon S., ‘High-brightness semipolar (20(21(over-bar) blue InGaN/GaN superluminescent diodes for droop-free solid-state lighting and visible-light communications’, OPTICS LETTERS, Volume: 41 Issue: 11, Pages: 2608-2611, 2016.
  • Shen, Chao, Lee, Changmin, Ng, Tien Khee, Speck, James S., Nakamura, Shuji, DenBaars, Steven P., Alyamani, Ahmed Y., Eldesouki, Munir M., Ooi, Boon S., ‘GHz Modulation Enabled Using Large Extinction Ratio Waveguide-Modulator Integrated with 404 nm GaN Laser Diode’, 2016 IEEE PHOTONICS CONFERENCE (IPC), Pages: 813-814, 2016.
  • Shen, Chao, Lee, Changmin, Ng, Tien Khee, Nakamura, Shuji, Speck, James S., DenBaars, Steven P., Alyamani, Ahmed Y., E-Desouki, Munir M., Ooi, Boon S., ‘High Gain Semiconductor Optical Amplifier - Laser Diode at Visible’, 2016 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM), Article Number: UNSP 22.4, 2016.
  • Shen, Chao, Leonard, John T., Young, Erin C., Ng, Tien Khee, DenBaars, Steven P., Speck, James S., Nakamura, Shuji, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘GHz modulation bandwidth from single-longitudinal mode violet-blue VCSEL using nonpolar InGaN/GaN QWs’, 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), 2016.
  • Zhao, Chao, Ng, Tien Khee, Wei, Nini, Prabaswara, Aditya, Alias, Mohd S., Janjua, Bilal, Shen, Chao, Consiglio, Giuseppe Bernardo, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘Direct Growth of High-Power InGaN/GaN Quantum-Disks-in-Nanowires Red Light-Emitting Diodes on Polycrystalline Molybdenum Substrates’, 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), 2016.
  • Chao Shen, Tien Khee Ng, John T. Leonard, Arash Pourhashemi, Hassan M. Oubei, Mohd S. Alias, Shuji Nakamura, Steven P. DenBaars, James S. Speck, Ahmed Y. Alyamani, Munir M. Eldesouki, and Boon S. Ooi., ‘High-Modulation-Efficiency, Integrated Waveguide Modulator–Laser Diode at 448 nm’,ACS Photonics, 2016, 3 (2), pp 262–268.
  • Shen, Chao, Leonard, John, Pourhashemi, Arash, Oubei, Hassan, Alias, Mohd Sharizal, Ng, Tien Khee, Nakamura, Shuji, DenBaars, Steven P., Speck, James S., Alyamani, Ahmed Y., Eldesouki, Munir M., Ooi, Boon S., ‘Low Modulation Bias InGaN-based Integrated EA-Modulator-Laser on Semipolar GaN Substrate’, 2015 PHOTONICS CONFERENCE (IPC), 2015.
  • Mishra, Pawan, Ng, Tien Khee, Janjua, Bilal, Shen, Chao, Eid, Jessica, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘Extending quantum efficiency roll-over threshold with compositionally graded InGaN/GaN LED’, 2014 IEEE PHOTONICS CONFERENCE (IPC), Pages: 22-23, 2014.
  • Janjua, Bilal, Tien Khee Ng, Alyamani, Ahmed Y., El-Desouki, Munir M., Ooi, Boon S., ‘Enhancing Carrier Injection Using Graded Superlattice Electron Blocking Layer for UVB Light-Emitting Diodes’, IEEE PHOTONICS JOURNAL, Volume: 6, Issue: 6, Article Number: 1600312, 2014.