ULTRAFASTELECTRONS · Advanced ultrafast electron sources for quantum optics experiment with free electrons
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2008-10-01 → 2012-09-30
- Финансиране от ЕС
- 100 000 €
- Участници
- 1
- Схема
- MC-IRG
Линиите свързват координатора с партньорите.
Накратко на български
Емисиите на електрони от метални нановърхове се контролират чрез ултракратки лазерни импулси. Това помага за по-доброто разбиране на квантовите процеси и взаимодействието на светлината с електроните в много мащаб и време.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Advanced ultrafast electron sources for quantum optics experiment with free electrons
The project objectives of this grant were to setup an experiment aimed at controlling laserdriven electron emission with unprecedented control in both space and time. Novel emitters as well as femtosecond-laser driven emission of electron from sharp field emitters was to be and has been investigated. Within this project we have achieved the following scientific results: • Observation of above-threshold-photoemission (ATP). M. Schenk, M. Krüger, P. Hommelhoff, Physical Review Letters 105, 257601 (2010) • Observation of strong-field effects in ATP, published in the above-mentioned article • Generation of gold tips with new and simple method. M. Eisele, M. Krüger, M. Schenk, A. Ziegler, P. Hommelhoff, Rev. Sci. Instr. 82, 026101 (2011) • Demonstration of attosecond physics at a metal nanotip. M. Krüger, M. Schenk, P. Hommelhoff, Attosecond control of electrons emitted from a nanoscale metal tip, Nature 475, 78 (2011). • Observation and theoretical understanding of electron rescattering at a metal nanotip. G. Wachter, Chr. Lemell, J. Burgdörfer, M. Schenk, M. Krüger, P. Hommelhoff, Electron rescattering at metal nanotips induced by ultrashort laser pulses, Phys. Rev. B 86, 035402 (2012) • In sum, 7 publication resulted. The ones that are given in the complete publication list comprise review and deeper insight articles related to the scientific results mentioned here. In terms of scientific results, this is considerably more than what was initially proposed. Thus, the proposal goals have been fully met. Specifically, in terms of the goals mentioned in the grant agreement, the experiment is fully operational, has taken the mandatory steps to work on the forefront of science, and has been producing highly visible results. Socio-economic impacts lie mostly on the training of students. Overall, about a dozens PhD, master, and bachelor students have been trained on this project. Several have graduated and found very highly regarded and highly paid jobs, for example at high-tech companies. Others have chosen to stay in science and are now working towards their PhD. Many visitors have been demonstrated what basic science is, how it relates to applications, and how taxpayer’s money is converted to knowledge in cutting edge research.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
This proposal aims at the development of an electron source that will allow controlling the position of free electrons with extremely high precision in space and time. Such a tool will enable novel quantum optics experiments and might turn into an electron source widely used in time-resolved scanning electron microscopy and electron diffraction, a field in which Europe is currently trailing the US. The proposed experiment will be a complementary effort to the applicant’s research that he is currently setting up with a Max Planck Junior Research Group Grant. After his PhD work in T.W. Hänsch’s group the applicant spent four years as postdoctoral researcher at Stanford University and returned to Europe in November 2007. The proposed experiment will transfer much of the applicant’s experience from the US and is based on the combination of a special field emission tip he developed in the US and a femtosecond laser oscillator. Femtosecond laser pulses hit the tip and so emit electrons from nanometric dimensions within timescales of a femtosecond. The final goal is a deterministic electron source, where one and only one electron is emitted with every laser pulse. Such a source would immediately enable classic quantum optics experiments. Advanced emitters will be used that exhibit quantum behaviour such as single atom tips and carbon nanotubes where emission takes place from a single or few atoms only. The proposed work would ideally augment the experiments that the applicant will perform with the Max Planck funds and will initially go in parallel to these. Proposed experiments will potentially allow highly increased visibility of his research and will help him to take the next step towards a faculty position at a respected research institution in Europe. Furthermore, expected results will strengthen research in Europe in an underrepresented field, will be relevant to the applicant’s former host at Stanford and will lead to continued collaboration on a peer level.
Оригинален текст от CORDIS (на английски).
Участници
- MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV · MUNCHENКоординаторГермания
Връзки
Данни: CORDIS, © Европейски съюз