Optical microcombs represent a new paradigm for generating laser frequency combs based
on compact chip-scale devices, which have underpinned many modern technological …

Research on isolated attosecond pulses (IAPs) based on high-order harmonic generation
changed substantially around 2010. Before then, the Ti: sapphire laser was the de facto …

Impurity doping is an effective approach to tuning the optoelectronic performance of host
materials by imparting extrinsic electronic channels. Herein, a family of lanthanide (Ln3+) …

Lithium niobate (LN), an outstanding and versatile material, has influenced our daily life for
decades—from enabling high-speed optical communications that form the backbone of the …

BACKGROUND The generation and control of coherent electromagnetic waves, such as
those provided by electronic oscillators in the radio frequency domain or lasers in the optical …

Photonic RF transversal signal processors, which are equivalent to reconfigurable electrical
digital signal processors but implemented with photonic technologies, are attractive for high …

Enhanced supercontinuum generation (SCG) is experimentally demonstrated in integrated
silicon nitride (Si3N4) waveguides incorporating highly nonlinear graphene oxide (GO) in …

Optical frequency combs were developed nearly two decades ago to support the world's
most precise atomic clocks. Acting as precision optical synthesizers, frequency combs …

The quest towards the integration of ultra-fast, high-precision optical clocks is reflected in the
large number of high-impact papers on the topic published in the last few years. This interest …

The silicon nitride (Si 3 N 4) planar waveguide platform has enabled a broad class of low-
loss planar-integrated devices and chip-scale solutions that benefit from transparency over a …