In this talk, I will report our recent implementation of squeezed vacuum states at 1064 nm. With a bow-tie, optical parametric oscillator cavity, and our home-made balanced homodyne detectors, noise reduction up to 10dB below the vacuum is measured. With the operation of a 300 m filter cavity prototype installed at the National Astronomical Observatory of Japan, application of such a vacuum squeezed state to the gravitational wave detector, in order to achieve a broadband reduction, will be discussed. At the same time, based on the niche of silicon photonics technologies and semiconductor industries in Taiwan, we will also introduce our new project toward the implementation of scalable quantum photonic chips by integrating photonic qubits (single photon source, entangled photon pair, squeezed light), optical components based on silicon photonics, and photon detector arrays (single photon avalanche diode, homodyne detector).

Dr. Ray-Kuang Lee received his BS degree from the Department of Electrical Engineering, National Taiwan University (EE/NTU) in 1997, and his MS and PhD degrees from the Institute of Electro-Optical Engineering, National Chiao-Tung University (IEO/NCTU), in 1999 and 2004, respectively. He worked as an assistant scientist at the National Center for High-Performance Computing, Taiwan, from 2001 to 2004, and as a visiting fellow at The Australian National University (ANU), Australia, in 2004. After his graduation, he continued staying in IEO/NCTU as a postdoctoral fellow in 2005. Then, he joined the Institute of Photonics Technologies/Department of Electrical Engineering, National Tsing Hua University (NTHU) as a faculty member at Aug. 2005, where he established the Quantum Optics Group dedicated to the quantum properties of light, as well as the classical limit. Specifically, his research interests include squeezed state generation, gravitational wave detectors, optical solitons and vortices in nonlinear systems, slow-light optics, and quantum memory. Currently, he is also an adjunct Professor in the Department of Physics, National Tsing Hua University, Center Scientist of the Physics division, National Center for Theoretical Sciences (NCTS), and a board member for KAGRA Scientific Congress (KSC).