Kaikai Liu

Jul 7, 2024 | nature.com | Debapam Bose |Andrei Isichenko |Kaikai Liu |Jiawei Wang |Nitesh Chauhan

AbstractHeterogeneous and monolithic integration of the versatile low-loss silicon nitride platform with low-temperature materials such as silicon electronics and photonics, III–V compound semiconductors, lithium niobate, organics, and glasses has been inhibited by the need for high-temperature annealing as well as the need for different process flows for thin and thick waveguides.

Mar 6, 2024 | nature.com | Beichen Wang |Kaikai Liu |Jiawei Wang |Paul Morton |Daniel Blumenthal |Fatemehsadat Tabatabaei

AbstractThe generation of ultra-low-noise microwave and mmWave in miniaturized, chip-based platforms can transform communication, radar and sensing systems1,2,3. Optical frequency division that leverages optical references and optical frequency combs has emerged as a powerful technique to generate microwaves with superior spectral purity than any other approaches4,5,6,7.

Apr 26, 2023 | opg.optica.org | Kaikai Liu |Jiawei Wang |Andrei Isichenko |Daniel Blumenthal

AbstractPhotonic molecules can realize complex optical energy modes thatsimulate states of matter and have application to quantum, linear, andnonlinear optical systems. To achieve their full potential, it iscritical to scale the photonic molecule energy state complexity andprovide flexible, controllable, stable, high-resolution energy stateengineering with low power tuning mechanisms.

Mar 10, 2023 | nature.com | Kaikai Liu

MaterialsAll the chemicals were analytical grade without further purification: Zinc aetate dihydrate (Zn(Ac)2 ∙ 2H2O), potassium hydroxide (KOH), (3-aminopropyl) triethoxysilane (APTES), Phosphate buffer solution (PBS) were purchased from Aladdin Chemistry Co. Ltd. (Shanghai, China). Absolute ethanol was obtained from Tianjin Yongda Chemical Reagent Co. Ltd. (Tianjin, China).