摘要
Optical frequency combs(OFCs)have great potential in communications,especially in dense wavelength-division multiplexing.However,the size of traditional OFCs based on conventional optical microcavities or dispersion fibers is at least tens of micrometers,far larger than that of nanoscale electronic chips.Therefore,reducing the size of OFCs to match electronic chips is of necessity.Here,for the first time to our knowledge,we introduce surface plasmon polaritons(SPPs)to the construction of OFCs to realize a miniature device.The thickness of our device is reduced below 1μm.Though the presence of SPPs may induce ohmic and scattering loss,the threshold of the device is obtained as 9μW,comparable to the conventional device.Interestingly,the response time is 13.2 ps,much faster than the optical counterparts.This work provides a feasible strategy for the miniaturization of OFCs.
基金
National Key Research and Development Program of China(2018YFE0204000)
Strategic Priority Research Program of the Chinese Academy of Sciences(XDB43000000)
National Natural Science Foundation of China(21975245,51972300,62274155,U20A20206)
Youth Innovation Promotion Association of the Chinese Academy of Sciences(2020114)
Beijing Nova Program(2020117)。
