Realizing highly integrated quantum photonic devices on a chip can enable new opportunities for photonic quantum computation. In this project, we explore heterostructures of stacked two-dimensional (2D) materials, such transition metal dichalcogenides (TMDC) or graphene, combined with optical microcavities as a platform for such devices. 2D materials are extremely thin and flexible, and have emerged as a host for a range of exciting new quantum phenomena, in particular when different 2D materials are stacked together. We plan to address the challenges of stacking more than two layers of 2D materials and of extending the stacking methods to produce wafer-scale structures, as well as the challenges of making this platform compatible by with CMOS infrastructure for future integration towards large-scale quantum photonic computation and networks. We will achieve our goal through an interdisciplinary effort involving deep physical and chemical knowledge, state-of-the-art nanofabrication processing techniques and facilities, extensive material and device characterization measurements, and theoretical investigations.
Entangled Photon Orbital Angular Momentum Arrays
Summary Arrays of orbital angular momentum (OAM) states of light are a new form of structured light so far relatively unexplored in quantum information science. Unlike spin angular momentum of light, which is related to light’s polarization and covers two dimensions, OAM states, sometimes described as ‘donut beams’ due to the shape of the field […]
September 19, 2019
Next Generation Quantum Sensors
We are developing new semiconductor p-n junctions and designing novel nanowire arrays that have the potential to significantly enhance the ability to detect light at the single photon level over an unprecedented wavelength range from the ultraviolet to infrared.
June 1, 2017
Plasmon Control of Quantum States in Semiconductor Nanocrystals
Summary Thanks to the light-induced collective oscillations of free charges at the boundary between a conducting material and a dielectric, known as surface plasmon resonance, metallic nanostructures can exhibit strong light absorption and scattering. The sensitivity of these resonances to the local environment and shape of the metallic structures allows them to be used, […]
March 21, 2018
Materials for Majorana-based Topological Qubits
Summary Topological qubits offer a novel pathway to scalable quantum computing by simultaneously allowing for ease of coupling between qubits and strong decoupling of qubits from noise and dissipation. The most promising direction explores the topologically induced protection of theoretically predicted exotic quasiparticles, the so-called Majorana Zero Modes or MZMs. To-date MZMs, which follow […]
January 28, 2019