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PI Physik Instrumente - Revolution In Photonics Align LW LB 3/24

Nano whispering gallery reduces semiconductor emission lifetime

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Ashley N. Paddock, [email protected]

Applying the concept of whispering galleries to nanoscale devices drastically reduces emission lifetimes, a key property of light-emitting semiconductors, and shows great potential for the development of new ultrafast photonic devices. Whispering galleries are circular chambers built into cathedrals by Renaissance architects; they are designed to reflect and direct sound waves so that a whisper can be heard from across the room. When semiconductors are excited, it takes a few nanoseconds for them to return to the ground state, which is accompanied by an emission of light. This is...Read full article

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    Published: October 2011
    Glossary
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    silicon dioxide
    An abundant material found in the form of quartz and agate and as one of the major constituents of sand. The silicates of sodium, calcium, and other metals can be readily fused, and on cooling do not crystallize, but instead form the familiar transparent material glass.
    AmericasBasic Sciencecadmium sulfide coreelectromagnetic fieldsLight Emitting DiodeLight Sourceslight-emitting semiconductormodulatorsnanonanocrystalsnanoscale devicesnanoscale plasmonic cavityoptical cavityOpticsoscillating metal electronsPennsylvaniaphotovoltaicsResearch & Technologyresonant surface plasmonsRitesh Agarwalsemiconductor emission lifetime reductionsilicon dioxidesurface plasmonsTech Pulseultrafast photonic devicesUniversity of PennsylvaniaUPennwhispering galleriesLEDs

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