Sökning: "high-speed quantum electronics"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden high-speed quantum electronics.

1. 1. Superconducting High Speed Passive Interconnects

   Författare :Raihan Rafique; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rapid Single Flux Quantum RSFQ ; Superconducting Microstrip Line SMSL ; RSFQ Driver.; Interconnect Discontinuities; Multi-Chip-Module MCM ;

   Sammanfattning : Superconducting digital RSFQ technology offers unique digital processing solutions for the telecommunication that allows more than three times increasing capacity of the 3G networks, makes telecommunication receivers reconfigurable and adjustable for different services, and significantly enhances security level of the data transfer over the fibers.Key features of RSFQ technology are high speed, low power and high integration density. LÄS MER

3. 2. Electrical and Optical Properties of AlGaAs/GaAs Aperiodic Superlattices and Resonant Tunneling Diodes. Theory, Design and Applications

   Författare :Simon Mang Cao; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; exciton-assisted transport; miniband; high-speed quantum electronics; optical properties; ultrafast optoelectronics; field-induced transport; irregular superlattices; nanometer-scale heterostructures; laser diodes; resonant tunneling;

   Sammanfattning : The objective of the work presented in this thesis is to study quantum transport and optical properties of aperiodic superlattices and resonant tunneling diodes using III-V semiconductor heterostructures grown by molecular beam epitaxy. The study follows a procedure of theoretical modeling, computer-aided design and simulation, sample growth, and measurements. LÄS MER

4. 3. InGaAs Nanowire and Quantum Well Devices

   Författare :Lasse Södergren; NanoLund: Centre for Nanoscience; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanowire; quantum well; cryogenic; III-V; InGaAs; MOSFET; MOVPE; Hall; mobility; ballistic; RF;

   Sammanfattning : To fulfill the increasing demand for high-speed electronics used for computation or communication is one everlasting challenge for the semiconductor industry. Emerging fields such as quantum computation also has a need for circuits operating at cryogenic temperatures. LÄS MER

5. 4. Optical Phase Conjugation and All-Optical Demultiplexing using Four-Wave Mixing in Dispersion Shifted Fibers

   Författare :Per Olof E Hedekvist; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dispersion compensation; nonlinear fiber optics; high-speed communication; four-wave mixing; parametric amplification; noise figure; wavelength conversion; optical phase conjugation; all-optical demultiplexer; mid-span spectral inversion;

   Sammanfattning : This thesis deals with two applications of four-wave mixing in optical dispersion-shifted fibers; optical phase conjugation and all-optical switching. The work is a part of an effort to study the upgradability of the existing fiber plant, which is of large economic interest. LÄS MER

7. 5. Photonic Devices and Applications based on Intersubband Transitions and Electromagnetically Induced Transparency

   Författare :Peter Jänes; Lars Thylén; Christopher Phillips; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : Although photonic devices have experienced a rapid development lately, there is still room for substantial improvements in performance. From a telecommunications perspective, improvements in speed, size, integration and power consumption are desired. There is also a general interest in photonic devices with new functionalities. LÄS MER