Simultaneous Control of Position and Frequency of Quantum Emitters in WSe2 Monolayers
October 24, 2019 | UNISTEstimated reading time: 2 minutes
Quantum computing and quantum communication are two of the next-generation information processing technologies with high computational speed and high security. The technique to create and control the quantum emitters is at the core of such quantum information technology.
A research team, led by Professor Je-Hyung Kim in the School of Natural Sciences at UNIST has succeeded in simultaneously controlling the position and frequency of the quantum emitters by combining one-atom-thick 2D semiconductor materials with microelectromechanical systems (MEMS), which offers tremendous control over the strain field. The controlled quantum emitters are used in various quantum technologies, including photon-based quantum computing, quantum communications, and quantum metrology. Thus, their findings are expected to advance the field of quantum information processing by providing enhanced computation speed, accuracy, and security.
In a quantum computer, the information would be stored in quantum bits or qubits, the most basic unit of quantum information. Quantum light sources, such as electron spins or supercurrents, can implement qubits. Each individual qubit can be set to one and zero at the same time, unlike today’s computer bits that are either ones or zeros
Just as the key to existing information processing technology is a ‘semiconductor integrated device’, which implements a large number of bits, the technology to create and control qubits is essential for the realization of practical quantum information processing. Thus, in order to process more information at the same time, more qubits need to be integrated and for an effective interaction, each qubit must have the same characteristics. Therefore, for the commercialization of photon-based quantum information technology, we need a technology that can simultaneously create and control multiple quantum systems on a single chip.
The existing technology is used to grow quantum dots to develop multiple light sources. However, with this technology, it is difficult to control the position and frequency of quantum light sources, uniformly.
In the study, the research team demonstrated simultaneous control of position and frequency of the quantum emitters from transition metal dichalcogenide monolayers. Atomically thin two-dimensional materials are inherently sensitive to external strain and offer a new opportunity of creating and controlling the quantum emitters by engineering strain.
They fabricated an electrostatically actuated microcantilever with nanopyramid patterns, providing a local strain engineering platform for the WSe2 monolayer.
The integrated WSe2 generates high-purity single-photon emission at patterned positions with a tuning range of up to 3.5 meV. Together with the position and frequency control, they investigated the strain response on the fine-structure splitting and confirm 11% reduction in the fine splitting at the estimated tensile strain of 0.07%.
“Although various approaches for spatial and spectral control of the quantum emitters have been developed, on-chip control of both position and frequency is still a long-standing goal in solid-state quantum emitters,” says Professor Kim. “Our findings will help provide the basis for understanding the quantum light source-based quantum optics research.”
The findings of this research have been published in the online version of the September 2019 issue of Nano Letters. This work has been supported by the National Research Foundation of Korea and the Institute of Information and Communications Technology Planning and Evaluation (IITP), funded by the Ministry of Science and ICT (MSIT).
Suggested Items
NextFlex Convenes the Hybrid Electronics Community at Binghamton University
05/01/2024 | NextFlexBinghamton University hosted the NextFlex hybrid electronics community on April 18 for a day of expert presentations, breakout sessions on technology and manufacturing topics, and networking.
IDTechEx Report on Quantum Technology: Nano-scale Physics for Massive Market Impact
04/30/2024 | PRNewswireThe quantum technology market leverages nano-scale physics to create revolutionary new devices for computing, sensing, and communications. Across the industry, quantum technology offers a paradigm shift in performance compared with incumbent solutions.
TSMC Certifies Ansys Multiphysics Platforms, Enabling Next-Gen AI and HPC Chips
04/30/2024 | PRNewswireAnsys announced the certification of its power integrity platforms for TSMC's N2 technology full production release. Both Ansys RedHawk-SC and Ansys Totem are certified for power integrity signoff on the N2 process, delivering significant speed and power advantages for high performance computing, mobile chips, and 3D-IC designs.
Koh Young Extends Invitation to the 2024 IEEE Electronic Components and Technology Conference
04/30/2024 | Koh YoungKoh Young, the industry leader in True3D measurement-based inspection solutions, invites you to join us at the at the 2024 IEEE Electronic Components and Technology Conference from May 28-31, 2024, in Denver, Colorado at the Gaylord Rockies Resort & Convention Center.
Samsung Electronics Begins Industry’s First Mass Production of 9th-Gen V-NAND
04/29/2024 | Samsung ElectronicsSamsung Electronics, the world leader in advanced memory technology, today announced that it has begun mass production for its one-terabit (Tb) triple-level cell (TLC) 9th-generation vertical NAND (V-NAND), solidifying its leadership in the NAND flash market.