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On March 11, Science magazine conducted an article entitled "Generation of multiphoton entangled quantum states by means of integrated frequency combs" jointly conducted by Dr. Brent E. Little, Xi'an Qixin Photoelectric CTO, and City University of Hong Kong and several foreign institutes Published and made a comment on the article, and spoke highly of the multi-photon entanglement quantum frequency comb.
Multi-photon entangled states are the cornerstone of quantum communications, quantum computing and ultra-high resolution sensing and imaging techniques that transcend the classical limits and are of crucial importance in exploring fundamental quantum physics issues. Especially the large-scale integrated on-chip entangled photon source has become an urgent need for the development of quantum technology. Brent E. Little et al. Utilized the spontaneous four-wave mixing effect in the micro-ring resonator and the optical pulse pair with time-domain separation and phase adjustment as the pump source to obtain the frequency spacing of 200 GHz across the three communication bands of the SCL Entangled photon pairs - the entangled photon source is by far the widest bandwidth quantum-frequency comb with a quantum interference fringe visibility of 93.2%. By extracting two pairs of photons simultaneously at two different resonant wavelengths, the four-photon entangled state is obtained and the visibility of the quantum interference fringes reaches 89%. The research pioneered the era of on-chip generation and control of complex quantum states and provided a scalable integrated quantum information processing platform.
Experimental setup
It is understood that as a core Optoelectronics professionals Brent E. Little is a photonic integration field of technical experts in the field of photonic integration research for more than 20 years, with more than 50 international patents. More than a dozen papers have been published in "Natrue Photonics", "Nature", "High-index Difference Planar Optical Waveguide Technology Platform", which has been applied in the research fields such as continuous wave nonlinear effect, optical parametric oscillation, mode-locked laser and multi-channel entangled photon pairs. Communication "and other industry journals, the first time with the cooperation unit for the first time in the integrated photonic chip generated by the polarization-entangled photon pairs, the results published in" Nature Communication ". As an outstanding foreign expert working in China, he was also cordially meeting with Premier Li Keqiang on February 5 at the Great Hall of the People.
And Xi'an Xinkoxin Optoelectronics Technology Co., Ltd., which is engaged by Dr. Brent E. Little, insists on independently developing disruptive technologies in the field of optoelectronic integration and continuously promotes the development of China in the field of optoelectronic integrated circuits by grasping the core "core" technology of photonic information technology in the future. Optoelectronics specializes in the development of PIC (optoelectronic integrated circuit) chips, devices, modules and subsystems and is committed to a high level of integrated PIC solutions that utilize the world's only high index difference, low loss, low cost, Optoelectronic integration technology, multi-function, multi-channel optical communications core devices, providing the world's leading solution for ultra-large capacity, ultra-high density optical transmission system and promoting the implementation of "Broadband China" strategy.
As a forerunner in the field of optoelectronics integration, Qi Xin Optoelectronics has successively undertaken more than 30 national-level projects such as "135 Plan", "Science and Technology Little Giant Program" and "Pilot Project Plan", and has been reported by many media.