Cavity optomechanical device
We are interested in the physics and engineering of nanophotonic devices in the context of quantum information science, metrology, communications, and sensing. We use nanofabrication technology to develop engineered geometries that strongly enhance light-matter interactions, such as parametric nonlinear optical processes, coupling to quantum emitters, and acousto-optic effects. We study the basic device-level physics and tailor devices for specific applications, and our research generally involves computational modeling, nanofabrication, and optoelectronic and quantum photonic characterization. Recent topics have included quantum frequency conversion, single-photon and entangled-photon generation, microresonator frequency combs, optical parametric oscillators, and cavity electro-optomechanical transducers.
More generally, nanophotonic systems offer us the ability to study interesting physics in a controllable way, using platforms that are inherently suitable for the development of new technologies. Our labs are at the National Institute of Standards and Technology (NIST) in Gaithersburg, MD, and the Joint Quantum Institute at the University of Maryland in College Park.
Khoi Hoang
Khoi Tuan Hoang is a graduate student working on quantum technologies involving atomic vapors and integrated photonics.
Research Areas:
- Integrated photonics design/fab/test
- Integrated quantum photonics
Rahul Shrestha
Research Areas:
- Integrated photonics design/fab/test
- Integrated quantum photonics
New article on spectral translation in soliton microresonator frequency combs
Microresonator frequency combs offer the promise of precision time and frequency metrology that is integral to applications such as optical atomic clocks in a compact and low-power format that is amenable for deployment outside of a lab.
New article on broadband extraction of single photons from epitaxial quantum dots
Epitaxial InAs/GaAs quantum dots are well-established as the basis for bright single-photon sources, because they have nearly unity radiative efficiency and can be emebdded in photonic geometries that enable efficient funneling of the generated photons into a preferred optical channel.
New article on a high-performance optical microcavity platform
Optical microcavities are a basic tool for enhancing light-matter interactions, primarily through strong spatial and temporal field confinement.
New article on the physics of microresonator optical parametric oscillators
Microresonator optical parametric oscillators based on the third-order optical nonlinearity represent a versatile approach to on-chip, coherent light generation at any user-targeted wavelength across an exceptionally broad spectral range.
Invited review article on piezo-optomechanical quantum transduction
We have written a perspective review article on piezo-optomechanical approaches to quantum transduction between the microwave and optical domains.
New article on how silicon nitride growth conditions impact microcombs
We are very happy to report recent work, published in Optics Letters, in which we study the impact of silicon nitride growth conditions - in particular the precursor gas ratio - on the refractive index of the deposited films and its subsequent impact on frequency comb generation in microresonator fabricated out of these films.
Novel Design May Boost Efficiency of On-Chip Frequency Combs
On the cover of the Pink Floyd album Dark Side of the Moon, a prism splits a ray of light into all the colors of the rainbow. This multicolored medley, which owes its emergence to the fact that light travels as a wave, is almost always hiding in plain sight; a prism simply reveals that it was there.
New article on post-processing for tailoring broadband Kerr soliton microcombs
We have recently published a new paper in which we study the post-processing trimming of microring resonators - enabled through the absence of top cladding of the cavity - to finely tune its geometrical dispersion. This lets us tailor the microcomb bandwidth, which is strongly controlled by the geometrical dispersion, in a fine way.