tag: quantum dots

Light-Emitting V-Pits: An Alternative Approach toward Luminescent Indium-Rich InGaN Quantum Dots
By Technical Paper Link - 21 Dec, 2021 - Comments: 0

Abstract: "Realization of fully solid-state white light emitting devices requires high efficiency blue, green, and red emitters. However, challenges remain in boosting the low quantum efficiency of long wavelength group-III-nitride light emitters through conventional quantum well growth. Here, we demonstrate a new direct metal–organic chemical vapor deposition approach to grow In-rich InGa... » read more

The Race To Make Better Qubits
By Katherine Derbyshire - 18 Nov, 2021 - Comments: 0

One of the big challenges in quantum computing is getting qubits to last long enough to do something useful with them. After decades of research, there now appears to be tangible progress. The challenge with any new semiconductor technology is to improve performance by one or more orders of magnitude without discarding a half-century of progress in other areas. Qubits based on silicon quantu... » read more

Buried nanomagnet realizing high-speed/low-variability silicon spin qubits: implementable in error-correctable large-scale quantum computers
By Technical Paper Link - 27 Oct, 2021 - Comments: 0

Abstract: "We propose a buried nanomagnet (BNM) realizing highspeed/low-variability silicon spin qubit operation, inspired by buried wiring technology, for the first time. High-speed quantum-gate operation results from large slanting magnetic-field generated by the BNM disposed quite close to a spin qubit, and low-variation of fidelity thanks to the self-aligned fabrication process. Employing ... » read more

Uniform Spin Qubit Devices with Tunable Coupling in an All-Silicon 300 mm Integrated Process
By Technical Paper Link - 26 Oct, 2021 - Comments: 0

Abstract: Larger arrays of electron spin qubits require radical improvements in fabrication and device uniformity. Here we demonstrate excellent qubit device uniformity and tunability from 300K down to mK temperatures. This is achieved, for the first time, by integrating an overlapping polycrystalline silicon-based gate stack in an ‘all-Silicon’ and lithographically flexible 300mm flow. ... » read more

Will Co-Packaged Optics Replace Pluggables?
By Bryon Moyer - 14 Oct, 2021 - Comments: 0

As optical connections work their way deeper into the data center, a debate is underway. Is it better to use pluggable optical modules or to embed lasers deep into advanced packages? There are issues of convenience, power, and reliability driving the discussion, and an eventual winner isn’t clear yet. “The industry is definitely embracing co-packaged optics,” said James Pond, principal... » read more

Flat-Panel Display Demand Soars
By Mark LaPedus - 20 May, 2021 - Comments: 0

What a difference a year makes in the flat-panel display market. Prior to the Covid-19 pandemic outbreak in early 2020, the flat-panel display (FPD) market was gloomy. Oversupply, falling prices and losses were the common themes in the market. It’s been a different story during the outbreak. In 2020, the FPD market rebounded. In the stay-at-home economy, consumers went on a buying spree... » read more

Power/Performance Bits: April 20
By Jesse Allen - 20 Apr, 2021 - Comments: 0

Multiplexing twisted light Researchers from University of California San Diego and University of California Berkeley found a way to multiplex light by using discrete twisting laser beams from antennas made up of concentric rings. "It's the first time that lasers producing twisted light have been directly multiplexed," said Boubacar Kanté, an Associate Professor at UC Berkeley's Department ... » read more

Solution-processable integrated CMOS circuits based on colloidal CuInSe2 quantum dots
By Technical Paper Link - 11 Jan, 2021 - Comments: 0

Researchers at Los Alamos National Laboratory and University of California Irvine used quantum dots to create transistors which can be assembled into functional logic circuits. “Potential applications of the new approach to electronic devices based on non-toxic quantum dots include printable circuits, flexible displays, lab-on-a-chip diagnostics, wearable devices, medical testing, smart im... » read more

Power/Performance Bits: Jan. 11
By Jesse Allen - 11 Jan, 2021 - Comments: 0

Quantum dot transistors Researchers at Los Alamos National Laboratory and University of California Irvine used quantum dots to create transistors which can be assembled into functional logic circuits. "Potential applications of the new approach to electronic devices based on non-toxic quantum dots include printable circuits, flexible displays, lab-on-a-chip diagnostics, wearable devices, me... » read more

Power/Performance Bits: June 10
By Jesse Allen - 10 Jun, 2019 - Comments: 0

Quantum dots plus perovskites Researchers at the University of Toronto and KAUST created a hybrid material for solar cells that utilizes both perovskites and quantum dots. Both quantum dots and perovskites suffer from instability: perovskites degrade quickly and certain types become incapable of fully absorbing solar radiation at room temperature, while quantum dots must be covered with a p... » read more

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