Observational astronomer studying the growth of supermassive black holes and their co-evolution with host galaxies.

Develops superconducting qubits and QND microwave single-photon detectors, applying them both to scalable quantum computing architectures and to axion/dark-photon dark-matter search experiments as ultra-sensitive quantum sensors.

Observational astronomer studying time-domain astrophysics and transients (supernovae) using wide-field surveys and follow-up instrumentation.

Pioneer of single-molecule/single-nanoparticle surface-enhanced Raman scattering (SERS) and quantum-dot bioconjugate imaging; develops nanoparticle probes for ultrasensitive molecular detection and in vivo tumor imaging.

Studies quantum optics and quantum information with superconducting and hybrid quantum circuits, focusing on modular quantum computing architectures, microwave-to-optical photon transduction, and quantum error mitigation.

Studies neutral-atom quantum computing and quantum optics with Rydberg atoms in optical tweezer arrays, including entanglement, nonlinear optics, and Rydberg-based electrometry/sensing.

Develops single-molecule genomics technologies using nanofluidics and optical mapping to analyze whole genomes and structural variation.

Develops and applies single-molecule fluorescence super-resolution imaging (including FIONA, nanometer-accuracy localization) to study the structure and dynamics of molecular motors (myosins, kinesins, dyneins) and other biological macromolecules.

Studies quasars and supermassive black hole growth via reverberation mapping and large time-domain spectroscopic/photometric surveys.

Builds neutral-atom-array platforms coupled to optical cavities to explore nonlocal entanglement for modular fault-tolerant quantum computing and distributed quantum sensor networks; also works on quantum error correction and quantum foundations.