J
Justin Iveland
Researcher at University of California, Santa Barbara
Publications - 25
Citations - 1215
Justin Iveland is an academic researcher from University of California, Santa Barbara. The author has contributed to research in topics: Light-emitting diode & Auger effect. The author has an hindex of 7, co-authored 11 publications receiving 863 citations.
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Journal ArticleDOI
Direct measurement of Auger electrons emitted from a semiconductor light-emitting diode under electrical injection: identification of the dominant mechanism for efficiency droop.
Justin Iveland,Lucio Martinelli,Jacques Peretti,James S. Speck,Claude Weisbuch,Claude Weisbuch +5 more
TL;DR: The droop phenomenon in GaN light-emitting diodes originates from the excitation of Auger processes, which shows that hot carriers are being generated in the active region (InGaN quantum wells) by an Auger process.
Journal ArticleDOI
Suppressing quantum errors by scaling a surface code logical qubit
Rajeev Acharya,Igor L. Aleiner,R. Allen,Trond Andersen,Markus Ansmann,Frank Arute,Kunal Arya,Abraham Asfaw,Juan Atalaya,Ryan Babbush,Dave Bacon,Joseph C. Bardin,João Basso,Andreas Bengtsson,Sergio Boixo,G. Bortoli,Alexandre Bourassa,J Bovaird,L. Brill,Michael Broughton,Bob B. Buckley,David Bull,Tim Burger,B. Burkett,Nicholas Bushnell,Yu Chen,Zijun Chen,Benjamin Chiaro,J. Zachery Cogan,Roberto Collins,P. N. Conner,William Courtney,Alexander L. Crook,Benjamin M. Curtin,Dripto M. Debroy,A. Barba,Sean Demura,Andrew Dunsworth,Daniel Eppens,Catherine Erickson,Lara Faoro,Edward Farhi,Reza Fatemi,L. F. Burgos,Ebrahim Forati,Austin G. Fowler,Brooks Foxen,W. Giang,Craig Gidney,Dar Gilboa,Marissa Giustina,Alejandro Dau,Jonathan A. Gross,Steve Habegger,Michael C. Hamilton,Matthew P. Harrigan,Sean D. Harrington,Oscar Higgott,Jeremy P. Hilton,Michael J. Hoffmann,Sabrina Hong,Trent Huang,Ashley Huff,William J. Huggins,Lev Ioffe,Sergei V. Isakov,Justin Iveland,Evan Jeffrey,Zhang Jiang,C. Jones,Pavol Juhas,Dvir Kafri,Kostyantyn Kechedzhi,Julian Kelly,T. Khattar,Mostafa Khezri,M. Kieferov'a,Seong-Jin Kim,A. E. Kitaev,Paul V. Klimov,Andrey Klots,Alexander N. Korotkov,Fedor Kostritsa,John Mark Kreikebaum,David Landhuis,Pavel Laptev,K. Lau,L. Laws,JoonHo Lee,Kenny Lee,Brian Lester,Alexander T. Lill,Wayne Liu,A. Locharla,Erik Lucero,Fionn D. Malone,Jeffrey S. Marshall,Orion Martin,Jarrod R. McClean,Trevor McCourt,Matt McEwen,Anthony Megrant,B. Costa,Xiao Mi,Kevin C. Miao,Masoud Mohseni,Shirin Montazeri,Alexis Morvan,Emily Mount,Wojciech Mruczkiewicz,Ofer Naaman,Matthew Neeley,Charles Neill,Ani Nersisyan,Hartmut Neven,Michael Newman,J. Ng,A. Nguyen,Murray L. Nguyen,Murphy Yuezhen Niu,Thomas E. O'Brien,A. Opremcak,J. Platt,Andre Petukhov,Rebecca Potter,Leonid P. Pryadko,Chris Quintana,Pedram Roushan,Nicholas C. Rubin,N Moutab Saei,Daniel Sank,Kannan Aryaperumal Sankaragomathi,Kevin J. Satzinger,Henry F. Schurkus,Christopher John Schuster,Michael Shearn,A. Shorter,Vladimir Shvarts,J Skruzný,Vadim Smelyanskiy,William Smith,George Sterling,Doug Strain,Yuan Su,M. Szalay,A. Torres,Guifre Vidal,Benjamin Villalonga,C. V. Heidweiller,Ted White,Chen Xing,Ziyue Yao,Pin-Yi Yeh,Juhwan Yoo,G. Young,Adam Zalcman,Yaxing Zhang,Ningfeng Zhu +157 more
TL;DR: In this article , the authors report the measurement of logical qubit performance scaling across several code sizes, and demonstrate that their system of superconducting qubits has sufficient performance to overcome the additional errors from increasing qubit number.
Journal ArticleDOI
The efficiency challenge of nitride light-emitting diodes for lighting
Claude Weisbuch,Marco Piccardo,Lucio Martinelli,Justin Iveland,Jacques Peretti,James S. Speck +5 more
TL;DR: It is shown that both from the point of view of cost of ownership and carbon emissions reduction, the relevant metric is efficiency, more than the cost of lumens, which requires identification of the loss mechanisms in light emission from LEDs.
Journal ArticleDOI
High-Efficiency Blue and True-Green-Emitting Laser Diodes Based on Non-c-Plane Oriented GaN Substrates
James W. Raring,Mathew C. Schmidt,Christiane Poblenz,Yu-Chia Chang,Mark J. Mondry,Ben Li,Justin Iveland,Brianna Walters,Michael R. Krames,Richard Craig,Paul Rudy,James S. Speck,Steven P. DenBaars,Shuji Nakamura +13 more
TL;DR: Using non-c-plane bulk GaN substrates, the authors demonstrate continuous-wave singlemode blue-emitting laser diodes operating with over 23% wall plug efficiency and over 750 mW output power, which represent the highest values reported to date.
Journal ArticleDOI
Determination of the first satellite valley energy in the conduction band of wurtzite GaN by near-band-gap photoemission spectroscopy
Marco Piccardo,Marco Piccardo,Lucio Martinelli,Justin Iveland,Nathan G. Young,Steven P. DenBaars,Shuji Nakamura,James S. Speck,Claude Weisbuch,Claude Weisbuch,Jacques Peretti +10 more
TL;DR: In this article, the position of the first satellite valley in wurtzite GaN is directly determined by nearband-gap photoemission spectroscopy of $p$-doped GaN activated to negative electron affinity.