Colloidal semiconductor nanocrystals (nanoplatelets, perovskites…) have emerged as promising active materials for solution-processable opto-electronic and light-emitting devices such as nanocrystal lasers. Our group have achieved a nanolaser using colloidal nanocrystals that exhibits record-low threshold input power operating at room temperature using core-shell nanoplatelets, which are efficient nanocrystal emitters with the structure of quantum wells, coupled to a photonic-crystal nanobeam cavity that can highly confine and enhance the photoluminescence from emitters. The work is essential for nano-photonic and opto-electronic applications with reduced energy consumption.
Welcome to the Quantum Photonics Laboratory at the University of Maryland. We are part of the Joint Quantum Institute and the Institute for Research in Electronics and Applied Physics. We are working to develop quantum technology based on nanoscale photonic and semiconductor devices for applications in quantum computation, communication, and sensing.
Materials that confine electrons and holes in at least one dimension to quantum length scales exhibit unique quantum properties. This confinement can strongly modify both the optical and electronic properties of materials and produce strong quantum behavior. Notable examples include quantum wells, quantum dots, and atomically thin layered materials. We study the interactions of quantum confined materials with nanophotonic devices to create new sources of quantum light, novel opto-electronic devices operating at the fundamental energy limit, and efficient lasers and light emitting devices.
Rapid improvements in efficiency and sophistication are now extending these devices into the quantum regime, where single photons mediate interactions between embedded on-chip memories coupled to complex photonic circuits. We are studying methos to use integrated photonics to build large and complex quantum systems composed of photons and spins contained in a semiconductor chip.
The brain is a complex network of interconnected circuits that exchange signals in the form of action potentials. These action potent
In recent years topological photonics has been realized in multitude of platforms. It has gained attention due the presence of unidirectional chiral propagation of light via the edge states which are again immue to any disorder in the system. Such system can open path to plethora of application in many body physics, strong ight matter interaction , quantum hall physics of light. In our roup we focus on studying the strong light matter interaction via a topological waveguide in a planar photonic crystal geometry.
December 17, 2017Jehyung and Shahriar's paper on integrating quantum emitters with silicon photonics appears in Nano Letters
This letter is featured in Nature Photonics research highlights:
Also appears in several news releases: SemiconductorToday, Photonics.com, Phys.org, Science Newsline, EurekAlert, Asia Research News, and ECN Magazine.
November 30, 2017Zhili's paper on spontaneous emission enhancement of colloidal perovskite nanocrystals by a photonic crystal cavity features in Applied Physics Letters
Also appears in a press release from AIP Publishing: "Quantum Emitting Answer Might Lie in the Solution" (https://publishing.aip.org/publishing/journal-highlights/quantum-emittin...)
November 20, 2017
November 20, 2017
October 15, 2015