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physics.optics2026

Dynamically reconfigurable THz quantum walk comb laser through subharmonic excitation

Valerio Digiorgio, Robert Matthew Gray, Marco Raffa +5

On-chip frequency combs are increasingly relevant to both laser science and applications. Broad bandwidths and flat-top spectral envelopes are especially desirable for precision sp…

physics.optics2026

Quantum Frequency Resolved Optical Gating of Few-Cycle Squeezed Vacuum

Thomas Zacharias, Elina Sendonaris, Robert Gray +5

Offering terahertz of bandwidths and femtosecond timescales, ultrafast optics is enabling both the study of fundamental quantum optical phenomena and the advancement of quantum-enh…

physics.optics2025

Topological Soliton Frequency Comb in Nanophotonic Lithium Niobate

Nicolas Englebert, Robert M. Gray, Luis Ledezma +6

Frequency combs have revolutionized metrology, ranging, and optical clocks, which have motivated substantial efforts on the development of chip-scale comb sources. The on-chip comb…

physics.optics2025

Quadratic Supercontinuum Generation from UV to Mid-IR in Lithium Niobate Nanophotonics

Selina Zhou, Maximilian Shen, Ryoto Sekine +6

Supercontinuum light sources are widely used for applications ranging from imaging to sensing and frequency comb stabilization. The most common mechanisms for their generation rely…

physics.optics2025

Two-optical-cycle pulses from nanophotonic two-color soliton compression

Robert M. Gray, Ryoto Sekine, Maximilian Shen +7

Few- and single-cycle optical pulses and their associated ultra-broadband spectra have been crucial in the progress of ultrafast science and technology. Moreover, multi-color wavef…

physics.optics2025

Ultrafast neuromorphic computing with nanophotonic optical parametric oscillators

Midya Parto, Gordon H. Y. Li, Ryoto Sekine +5

Over the past decade, artificial intelligence (AI) has led to disruptive advancements in fundamental sciences and everyday technologies. Among various machine learning algorithms,…