The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Optical frequency combs in space bear the prospect of dramatically improving satellite navigation and they may pave the pathway for various space applications like satellite formation flights, global satellite navigation, earth observation, and satellite-based fundamental tests of physical constants [1]. Here we report on a precision ranging system based on a dual-comb architecture aiming for fast...
We have optically compared two fiber-based frequency combs with ultra-high stability. The resulting beat frequency shows integrated phase noise below 100 mrad (100Hz to 2MHz) and an overlapping Allan deviation of 1×10−16 at 1s, dropping below 1×10−18 at 500s.
An octave-spanning frequency comb is generated using electro-optic modulation of a 1550 nm laser and nonlinear broadening. With this comb we demonstrate offset frequency detection, precise metrology, and ultrastable synthesis of 10 GHz microwaves.
We demonstrate an optical clock based on stabilization of a microcomb to rubidium optical transitions. The clock's output is the 33 GHz microcomb line spacing, which is a coherent, integer sub-division of the rubidium reference.
Photoluminescence excitation spectra of single NV centers in diamond are studied and an optimal wavelength for NV is found. The physics of bidirectional switching between NV0 and NV charge states of the defect is elucidated.
The polarization state of the zero-phonon line of single NV-centers is studied after non-resonant optical excitation. High-resolution Fabry-Perot spectra reveal the possibility of observing two-photon interference of distant quantum emitters.
Diamond nanocrystals with single nitrogen-vacancy color centers are incorporated into dielectric micropillar resonators. We observe three-dimensional light confinement and antibunching in the photon emission.
This paper presents the concepts of metal nanoantennas and dielectric microresonators for solid-state quantum optics. For the microresonators, the concept is extended into the ultraviolet region and the first dielectric pillar microcavity with colloidal ZnO quantum dots is demonstrated. On the other hand, a tunable bowtie optical nanoantenna which consists of two gold nanotriangles is fabricated and...
In summary, we have fabricated high-Q micropillar cavities with circular and elliptical cross section containing CdSe/ZnS quantum dots or rods in the spacer layer. We find a systematically higher Q-factor along the short axis of the elliptical pillar compared to circular ones. The spectral position of the cavity resonances have been calculated by modeling the pillar cavity as a waveguide with an effective...
We have fabricated high-Q pillar resonators with colloidal CdSe/ZnS quantum dots or rods as light emitters by focused ion beam milling. Cavities with elliptical cross section show higher Q-values compared to circular resonators.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.