Nanoplasmonics deals with collective electron dynamics on the surface of metal nanostructures, which arises due to excitations called surface plasmons. Nanoplasmonics has numerous applications in science, technology, biomedicine, environmental monitoring, and defense. Until recently, all the effects, elements, and devices in nanoplasmonics have been passive: they use external optical energy, always losing a fraction of it to heat and leakage radiation. An active device generating energy directly on the nanoscale has been spaser (surface plasmon amplification by stimulated emission of radiation). The spaser have been introduced theoretically and discovered experimentally. We briefly consider quantum theory and latest results on spaser as an ultrafast quantum generator and amplifier of nanoplasmonic fields, ultrabright nanolabel, and highly-efficient nanosensor. We present latest original results: electrical nanospaser in the extreme quantum regime and graphene nanospaser.

Mark I. Stockman received his PhD and DSc degrees from institutes of the Russian Academy of Sciences. He is a Professor of Physics and the Director of the Center for Nanooptics (CeNO) at Georgia State University, Atlanta, GA, USA. He is a Fellow of the American Physical Society (APS), Optical Society of America (OSA), and SPIE – The International Society for Optoelectronic Engineering. He has served as a Distinguished Visiting Professor at Ecole Normale Supérieure de Cachan (France) and as a Visiting Professor at Ecole Supérieure de Physique and de Chimie Industrielle (Paris, France), and also as a Guest Professor at University of Stuttgart (Germany), Max Plank Institute for Quantum Optics (Garching, Germany), and Ludwig Maximilian University (Munich, Germany). A major direction of his research is theoretical nanoplasmonics, in particular, ultrafast and nonlinear nanoscale optical phenomena. He is a co-inventor of spaser (nanoplasmonic laser). He is an author of over 180 major research papers and has presented numerous plenary, keynote, and invited talks at major international conferences. He taught courses on nanoplasmonics and related topics at many major international meetings and scientific institutions in US, Canada, Europe, Asia, and Australia.

Researchers should cite this work as follows:

• Mark I Stockman (2015), "Spaser in Quantum Regime," https://nanohub.org/resources/21895.

  BibTex | EndNote

1. graphene
2. nanophotonics
3. nanoplasmonics
4. NCN Group - Photonics
5. plasmonics
6. sensors/sensing
7. SPASER