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We report here a monolithic photonic integration of light emitting diode (LED) with waveguide and photodetector to build a highly-integrated photonic system to perform functionalities on the GaN-on-silicon platform. Suspended p-n junction…

This paper describes the design and characteristics of monolithically integrated three-terminal gated III-Nitride light emitting diodes (LEDs) devices. The impact of channel doping and thickness on the voltage penalty of the transistor-LED…

InGaN/GaN tunnel junction contacts were grown on top of an InGaN/GaN blue (450 nm) light emitting diode wafer using plasma assisted molecular beam epitaxy. The tunnel junction contacts enable low spreading resistance n-GaN top contact layer…

Materials Science · Physics 2014-10-09 Sriram Krishnamoorthy , Fatih Akyol , Siddharth Rajan

Enhanced interband tunnel injection of holes into a PN junction is demonstrated using P-GaN/InGaN/N-GaN tunnel junctions with a specific resistivity of 1.2 X 10-4 {\Omega} cm2. The design methodology and low-temperature characteristic of…

Materials Science · Physics 2013-06-25 Sriram Krishnamoorthy , Fatih Akyol , Pil Sung Park , Siddharth Rajan

We demonstrate a novel electro-luminescence device in which GaN-based $\mu$-LEDs are used to trigger the emission spectra of monolayers of transition metal dichalcogenides, which are deposited directly on the $\mu$-LED surface. A special…

Applied Physics · Physics 2022-06-28 K. Oreszczuk , J. Slawinska , A. Rodek , M. Potemski , C. Skierbiszewski , P. Kossacki

We show that GdN nanoislands can enhance inter-band tunneling in GaN PN junctions by several orders of magnitude, enabling low optical absorption low-resistance tunnel junctions (specific resistivity 1.3 X 10-3 {\Omega}-cm2) for various…

Materials Science · Physics 2013-06-25 Sriram Krishnamoorthy , Thomas Kent , Jing Yang , Pil Sung Park , Roberto Myers , Siddharth Rajan

Achieving monolithic integration of passive acoustic wave devices, in particular RF filters, with active devices such as RF amplifiers and switches, is the optimal solution to meet the challenging communication requirements of mobile…

Applied Physics · Physics 2022-06-22 Mahmut Bicer , Stefano Valle , Jacob Brown , Martin Kuball , Krishna C. Balram

We present a systematic study of the current-voltage characteristics and electroluminescence of gallium nitride (GaN) nanowire on silicon (Si) substrate heterostructures where both semiconductors are n-type. A novel feature of this device…

Other Condensed Matter · Physics 2007-09-04 Mariano A. Zimmler , Jiming Bao , Ilan Shalish , Wei Yi , Venkatesh Narayanamurti , Federico Capasso

Light emitting diodes (LEDs) based on Gallium Nitride (GaN) have been revolutionizing various applications in lighting, displays, medical equipment, and other fields. However, their energy efficiency is still below expectations in many…

General Physics · Physics 2020-11-18 Joachim Piprek

This study demonstrates 3D monolithic integration of amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistors (TFTs) on Gallium Nitride (GaN) high electron mobility transistors (HEMTs) in a cascode configuration, achieving high…

Applied Physics · Physics 2025-07-11 Tian-Li Wu , Hsin-Jou Ho , Chia-Wei Liu , Yi-Chen Chen

III-Nitride light emitting diodes (LEDs) are widely used in a range of high efficiency lighting and display applications, which have enabled significant energy savings in the last decade. Despite the wide application of GaN LEDs, transport…

We report on the design and demonstration of polarization-engineered GaN/InGaN/GaN tunnel junction diodes with high current density and low tunneling turn-on voltage. Wentzel-Kramers-Brillouin (WKB) calculations were used to model and…

We report on the design, fabrication, and characterization of GaN interband tunnel junction showing forward tunneling characteristics. We have achieved very high forward tunneling currents (153 mA/cm2 at 10 mV, and 17.7 A/cm2 peak current)…

Materials Science · Physics 2011-12-30 Sriram Krishnamoorthy , Pil Sung Park , Siddharth Rajan

Spin-polarized field-effect transistor (spin-FET), where a dielectric layer is generally employed for the electrical gating as the traditional FET, stands out as a seminal spintronic device under the miniaturization trend of electronics. It…

Materials Science · Physics 2017-03-07 Fan Li , Cheng Song , Bin Cui , Jingjing Peng , Youdi Gu , Guangyue Wang , Feng Pan

Indium gallium nitride (InGaN) quantum well (QW) micro- and nanoscale light-emitting diodes (LEDs) are promising for next-generation ultrafast optical interconnects and augmented/virtual reality displays. However, scaling to nanoscale…

Ultraviolet microdisk lasers are integrated monolithically into photonic circuits using a III-nitride on silicon platform with gallium nitride (GaN) as the main waveguiding layer. The photonic circuits consist of a microdisk and a pulley…

Integrated quantum light source is increasingly desirable in large-scale quantum information processing.~Despite recent remarkable advances, new material platform is constantly being explored for the fully on-chip integration of quantum…

Blue light-emitting diodes (LEDs) consisting of a buried n+-p+ GaN tunnel junction, (In,Ga)N multiple quantum wells (MQWs) and a n+-GaN top layer are grown on single-crystal Ga-polar n+-GaN bulk wafers by plasma-assisted molecular beam…

Applied Physics · Physics 2019-06-26 YongJin Cho , Shyam Bharadwaj , Zongyang Hu , Kazuki Nomoto , Uwe Jahn , Huili Grace Xing , Debdeep Jena

Ultra violet light emitting diodes (UV LEDs) face critical limitations in both the injection efficiency and light extraction efficiency due to the resistive and absorbing p-type contact layers. In this work, we investigate the design and…

Gallium nitride (GaN) as a wide-band gap material has been widely used in solid-state lighting. Thanks to its high nonlinearity and high refractive index contrast, GaN-on-insulator (GaNOI) is also a promising platform for nonlinear optical…

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