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 …

To test the principle of complementarity and wave-particle duality quantitatively, we need a
quantum composite system that can be controlled by experimental parameters. Here, we …

We probe complex optical spectra at high resolution over a broad span in almost complete
darkness. Using a single photon-counting detector at light power levels that are a billion …

Optical splitters are one of the most important interconnects in the optical chips of future
optical quantum computers. Here, we introduce novel quantum photonic splitters based on …

We present a versatile method for producing two-mode stabilized squeezed coherent state
(SSCS) of light with controllable nonclassicality. Our method involves seeding …

For secure practical systems, quantum key distribution (QKD) must provide high key rates
over long distances. Time-entanglement-based QKD promises to increase the secret key …

Quantum sensing promises to revolutionize sensing applications by employing quantum
states of light or matter as sensing probes. Photons are the clear choice as quantum probes …

We measure the electromagnetically induced transparency (EIT) of a single-frequency comb
mode interacting with laser-cooled Rb87 atoms. A Λ hyperfine level structure in a D2 …

Femtosecond time-resolved spectroscopy and frequency-comb spectroscopy have been
individually developed to achieve better time and frequency resolutions, respectively. The …

Quantum spectroscopy with undetected photons (QSUP) utilizing the quantum entanglement
of parametrically down-converted photons has emerged as a new spectroscopic platform …