JRG-UHQ · Max Planck Junior Research Group for Novel Applications of Ultra-High-Q Optical Microcavities
6РП — Действия „Мария Кюри“
- Период
- 2006-02-01 → 2008-01-31
- Финансиране от ЕС
- 80 000 €
- Участници
- 1
- Схема
- IRG
Линиите свързват координатора с партньорите.
Накратко на български
Оптични микрорезонатори с размер на човешки косъм се използват за създаване на честотни гребени, които действат като прецизни „линаери“ за светлината. Те позволяват измерване на фундаментални константи и честоти на светлината с изключителна точност чрез компактни силиконови чипове.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - JRG-UHQ (Max Planck Junior Research Group for Novel Applications of Ultra-High-Q Optical Microcavities)
The development of optical frequency combs allowed for measuring fundamental constants with previously unattained precision within the last years. A frequency comb is a laser source, which consists not only of one frequency (continuous wave laser), but consists of a large number of discrete frequencies that are equally spaced (like the teeth of a comb). In case that the comb's frequencies are known, it is possible to use it to measure the frequency of unknown light sources for example the light emitted from certain atomic transitions. Just like a ruler is used to measure lengths, a frequency comb is the perfect tool for measuring optical frequencies of light with high precision. In our research group at the Max-Planck-Institute of Quantum Optics (MPQ) it has been possible to demonstrate a completely novel and simple method for frequency comb generation. This technique was proposed in the IRG proposal and is based on four wave mixing (parametric oscillations). While previously mode-locked lasers (complex and bulky systems) have been used for comb generation, we could show that it is possible to generate frequency combs in a micron size resonator made of fused quartz that sits on a silicon microchip. These resonators, which have a diameter in the range of the size of a human hair can store photons for comparably long times, which leads to extremely high circulating light intensities and to nonlinear optical effects that enable the frequency comb generation. Since this new comb generation process is entirely different from conventional frequency combs, we proved that the spectrum generated with our system indeed constitutes a frequency comb. This experiment has been performed by comparing our comb to a conventional frequency comb. In a second step, we have shown that it is possible to fully control and stabilise the frequency comb, which is important to use it as tool for example in the field of frequency metrology. To achieve this control a novel method has been developed to change the spacing of the frequency comb teeth. Since the spacing depends on the length of the path that the light has to travel within the resonator and this path depends on the temperature of the resonator, we have shown that it is possible to stabilise and control the comb spacing extremely fast by varying the laser power sent into the resonator.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Optical micro-cavities store in small volumes for extended amounts of time and find application in fundamental and applied studies, ranging from non-linear optics, quantum information to biological sensing and telecommunications. Recently, a rapid progress has been made in increasing the temporal confinement of photons in micro-cavities (as given by the quality factor, Q). These advances in Q-factor have allowed for the first time to observe the regime of strong coupling of an atom-cavity system, as well as al lowed the integration of non-linear optical oscillators, such as Raman lasers, optical parametric oscillators and optical switches on a silicon chip.The current research proposal will build on these advances and explore an hereto unstudied application area of ultra-high-Q toroid micro-cavities: Quantum Optics. Despite the tremendous promise of ultra-high-Q toroid micro-cavities, these devices have not yet been used for Quantum Optical experiments. Therefore, the proposed studies are both novel and timely and will to contribute to the field of secure quantum communication, a field that has mobilized the international physics community. Moreover, this proposal will explore combining chip based micro-cavities with the atom microchip technology developed in the host laboratory. The host laboratory is the Max Planck Institute for Quantum Optics (MPQ) in Garching, specifically the Division of Laser Spectroscopy of T.W. Haensch.The applicant is a German Scientist, who has completed his PhD and Postdoc at the California Institute of Technology (Caltech) in Pasadena, USA and who has recently been selected to establish a Max Planck Junior Research Group. The MPQ has arranged all necessary practical arrangements for a successful integration of the researcher. The present proposal will finance additional equipment for his laboratory, and thereby contribute to the successful and lasting integration of the researcher, as well as to attract back a researcher from a top US school.
Оригинален текст от CORDIS (на английски).
Участници
- MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN E.V. REPRESENTED BY: MAX-PLANCK-INSTITUT FUR QUANTENOPTIK · MUENCHENКоординаторГермания
Връзки
Данни: CORDIS, © Европейски съюз