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We introduce a method for non-uniform random number generation based on sampling a physical process in a controlled environment. We demonstrate one proof-of-concept implementation of the method that reduces the error of Monte Carlo…

Other Computer Science · Computer Science 2020-04-24 James Timothy Meech , Phillip Stanley-Marbell

We propose an explicit small-signal graphene field-effect transistor (GFET) parameter extraction procedure based on a charge-based quasi-static model. The dependence of the small-signal parameters on both gate voltage and frequency is…

Mesoscale and Nanoscale Physics · Physics 2023-02-10 Nikolaos Mavredakis , Anibal Pacheco-Sanchez , Wei Wei , Emiliano Pallecchi , Henri Happy , David Jiménez

Ten years have passed since the beginning of graphene research. In this period we have witnessed breakthroughs both in fundamental and applied research. However, the development of graphene devices for mass production has not yet reached…

Mesoscale and Nanoscale Physics · Physics 2016-02-19 N. C. S. Vieira , J. Borme , G. Machado , F. Cerqueira , P. P. Freitas , V. Zucolotto , N. M. R. Peres , P. Alpuim

The development of flexible electronics operating at radio-frequencies (RF) requires materials that combine excellent electronic performance and the ability to withstand high levels of strain. In this work, we fabricate graphene…

Mesoscale and Nanoscale Physics · Physics 2013-02-07 Nicholas Petrone , Inanc Meric , James Hone , Kenneth L. Shepard

We present a graphene-based phase shifter for radio-frequency (RF) phase-array applications. The core of the designed phase-shifting system consists of a graphene field-effect transistor (GFET) used in a common source amplifier…

Mesoscale and Nanoscale Physics · Physics 2021-03-16 A. Medina-Rull , F. Pasadas , E. G. Marin , A. Toral-Lopez , J. Cuesta , A. Godoy , D. Jiménez , F. G. Ruiz

By means of numerical simulation, we study in this work the effects of uniaxial strain on transport properties of strained graphene heterojunctions and explore the possibility to achieve good performance of graphene transistors using these…

Mesoscale and Nanoscale Physics · Physics 2014-04-03 Viet Hung Nguyen , Huy Viet Nguyen , Philippe Dollfus

Graphene-based devices are planned to augment the functionality of Si and III-V based technology in radio-frequency (RF) electronics. The expectations in designing graphene {field-effect} transistors (GFETs) with enhanced RF performance…

Applied Physics · Physics 2019-11-18 A. Toral-Lopez , E. G. Marin , F. Pasadas , J. M. Gonzalez-Medina , F. G. Ruiz , D. Jiménez , A. Godoy

A graphene field effect transistor, where the active area is made of monolayer large-area graphene, is simulated including a full 2D Poisson equation and a drift-diffusion model with mobilities deduced by a direct numerical solution of the…

Applied Physics · Physics 2021-09-01 Giovanni Nastasi , Vittorio Romano

Graphene field-effect transistors (GFETs) are experimental devices which are increasingly seeing commercial and research applications. Simulation and modelling forms an important stage in facilitating this transition, however the majority…

Mesoscale and Nanoscale Physics · Physics 2022-06-28 Nathaniel J. Tye , Abdul Wadood Tadbier , Stephan Hofmann , Phillip Stanley-Marbell

A chip to wafer scale, CMOS compatible method of graphene device fabrication has been established, which can be integrated into the back end of the line (BEOL) of conventional semiconductor process flows. In this paper, we present…

Applied Physics · Physics 2022-11-23 A. D. Smith , S. Vaziri , S. Rodriguez , M. Östling , M. C. Lemme

During the last years, Graphene based Field Effect Transistors (GFET) have shown outstanding RF performance; therefore, they have attracted considerable attention from the electronic devices and circuits communities. At the same time,…

Mesoscale and Nanoscale Physics · Physics 2014-05-09 Saul Rodriguez , Sam Vaziri , Anderson Smith , Sebastien Fregonese , Mikael Ostling , Max C. Lemme , Ana Rusu

The reliability of analysis is becoming increasingly important as point-of-care diagnostics are transitioning from single analyte detection towards multiplexed multianalyte detection. Multianalyte detection benefits greatly from…

Low-frequency noise (LFN) variability in graphene transistors (GFETs) is for the first time researched in this work. LFN from an adequate statistical sample of long-channel solution-gated single-layer GFETs is measured in a wide range of…

We invented a method to fabricate graphene transistors on oxidized silicon wafers without the need to transfer graphene layers. To stimulate the growth of graphene layers on oxidized silicon a catalyst system of nanometer thin…

Mesoscale and Nanoscale Physics · Physics 2012-05-23 Pia Juliane Wessely , Frank Wessely , Emrah Birinci , Bernadette Riedinger , Udo Schwalke

The maturity of the chemical vapor deposition graphene-based device processing has increased from chip level demonstrations to wafer-scale fabrication in the past few years. Due to this wafer-scale, electrical characterization and analysis…

Mesoscale and Nanoscale Physics · Physics 2026-02-20 Anton Murros , Miika Soikkeli , Anni Virta , Arantxa Maestre , Leire Morillo , Alba Centeno , Amaia Zurutuza , Olli-Pekka Kilpi

In this work, we present a performance analysis of Field Effect Transistors based on recently fabricated 100% hydrogenated graphene (the so-called graphane) and theoretically predicted semi-hydrogenated graphene (i.e. graphone). The…

Mesoscale and Nanoscale Physics · Physics 2015-05-18 Gianluca Fiori , S. Lebègue , A. Betti , P. Michetti , M. Klintenberg , O. Eriksson , Giuseppe Iannaccone

This paper reviews the current status of graphene transistors as potential supplement to silicon CMOS technology. A short overview of graphene manufacturing and metrology methods is followed by an introduction of macroscopic graphene field…

Mesoscale and Nanoscale Physics · Physics 2009-11-25 Max C. Lemme

Algorithms for generating random numbers that follow a gamma distribution with shape parameter less than unity are proposed. Acceptance-rejection algorithms are developed, based on the generalized exponential distribution. The squeeze…

Computation · Statistics 2024-11-18 Seiji Zenitani

Nonuniformly sampled signals are prevalent in real-world applications. However, estimating their power spectra from finite samples poses a significant challenge. The optimal solution-Bronez Generalized Prolate Spheroidal Sequence (GPSS) by…

Signal Processing · Electrical Eng. & Systems 2025-12-24 Jie Cui , Benjamin H. Brinkmann , Gregory A. Worrell

The graph Fourier transform (GFT) is a fundamental tool in graph signal processing and has recently been extended to the graph fractional Fourier transform (GFRFT). Existing sampling methods in the GFRFT domain are primarily designed to…

General Mathematics · Mathematics 2026-05-27 Yu Zhang , Jia-Yin Peng , Bing-Zhao Li
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