Cavity quantum electrodynamics (cavity QED) is conventionally described by the Jaynes- or Tavis-Cummings model, where emitters couple to a single-mode cavity. The opposite scenario, in which an ensemble of couples single spatial mode propagating light field, waveguide QED, interact with continuum frequency modes. Here we present experiment cold atoms strongly fiber-ring resonator variable lengt...

In recent years, microfluidic devices have become important tools for cell analysis in biology and medicine. They enable fast and inexpensive analysis with reduced consumption of analytes. However, for optical detection involving FACS (fluorescence-activated cell sorting), sample preparation by attaching an antibody-labeled fluorochrome to the cell is required. Cell tagging by fluorochromes is ...

We investigate theoretically the mechanical effects of light on atoms trapped by an external potential, whose dipole transition couples to the mode of an optical resonator and is driven by a laser. We derive an analytical expression for the quantum center-of-mass dynamics, which is valid in presence of a tight external potential. This equation has broad validity and allows for a transparent int...

A microfiber-coupled dual-rail nanobeam resonator is proposed and demonstrated. The dual-rail scheme is employed to encourage the overlap between the light emitter and the air mode. The one-dimensional resonant cavity is formed by contacting a curved microfiber with the dual-rail nanobeam. The finite width of the dual-rail nanobeam turns out to be advantageous for both out-coupling with the mic...

Customizing the output beam shape from a laser invariably involves specialized optical elements in the form of apertures, diffractive optics and free-form mirrors. Such optics require considerable design and fabrication effort and suffer from the further disadvantage of being immutably connected to the selection of a particular spatial mode. Here we overcome these limitations with the first dig...

We present the experimental demonstration of a novel class of hybrid III-V-on-silicon microlasers. We show that by coupling a silicon cavity to a III-V waveguide, the interaction between the propagating mode in the III-V waveguide and the cavity mode in the silicon resonator results in high, narrowband reflection back into the III-V waveguide, forming a so-called resonant mirror. By combining t...

We report a wavelength-tunable multi-point pump scheme of the semiconductor disk lasers (SDLs). By designing an external cavity SDL with intra-cavity transmission grating, multiple gain regions share same resonator. The effect grating on output laser power, wavelength, and beam quality was investigated. emission wavelength could be tuned over bandwidth ∼18 nm. With pumping, we achieve power alm...

Today’s narrowest linewidth lasers are limited by mirror motion in the reference optical resonator used to stabilize the laser’s frequency. Recent proposals suggest that superradiant lasers based on narrow dipoleforbidden transitions in cold alkaline earth atoms could offer a way around this limitation. Such lasers operating on transitions with linewidth of order mHz are predicted to achieve ou...