Presenter: Robert Kwolek

Group Members: Rintaro Tsuchida, Shion Eto

Faculty Sponsor: Rajveer O. Nehra

School: UMass Amherst

Research Area: Electrical and Computer Engineering

Session: Poster Session 4, 2:15 PM - 3:00 PM, Auditorium, A26

ABSTRACT

Nanophotonics provides a promising pathway toward scalable quantum information processing by enabling large-scale integration, low optical loss, and room-temperature operation. Among emerging platforms, thin-film lithium niobate (TFLN) has recently gained significant attention due to its strong second-order optical nonlinearity and large electro-optic effect. These properties enable the integration of a universal set of quantum optical operations—including squeezing, modulation, and low-loss routing—on a single chip. This poster presents the design and experimental characterization of several device innovations developed by undergraduate researchers in the Quantum Information Systems Lab at UMass Amherst. Key advances include:

• Fabrication-aware adapted periodic poling for robust quasi-phase matching in non-uniform thin-film waveguides

• Low-loss linear routing components, including novel quasi-Euler fast-quasi-adiabatic (FAQUAD) wavelength multiplexers

• Programmable interferometric circuits for scalable photonic quantum systems

Together, these developments enable improved nonlinear efficiency and ultra-low-loss routing in integrated TFLN quantum photonic circuits, advancing the realization of scalable on-chip quantum technologies.

RELATED ABSTRACTS

• Accelerating Direct Simulation Monte Carlo Methods, Padilla, Francis, UMass Amherst, Poster Session 4, 2:15 PM - 3:00 PM, 163, C13