Devices single mode cavity

A rectangular single-mode cavity consists of a section of waveguide which is terminated with a non-contact plunger which can tune the effective cavity length (resonant frequency). The mode of operation of such a device is, typically, TEjon... 

Photons in quantum optical cavities also constitute excellent qubit candidates [52]. Resonant coupling of atoms with a single mode of the radiation field was experimentally achieved 25 years ago [53], and eventually the coherent coupling of quantum optical cavities with atoms or (simple) molecules was suggested as a means to achieve stable quantum memories in a hybrid quantum processor [54]. There might be a role to play for molecular spin qubits in this kind of hybrid quantum devices that combine solid-state with flying qubits. 

However, the size of all afore mentioned cavities is typically much larger than the emitted light wavelength T. Characteristic cavity diameters usually exceed 5 pm. In order to create nano-sized and laterally single mode devices, the prospering branch of nanophotonics requires resonators whose lateral size is at least comparable to or even smaller than T. 

The Discover system is a new device designed for synthesis. CEM claims a single-mode applicator and focused microwaves. According to technical data the applicator comprises two concentric cavities with an aperture ensuring coupling (Fig. 2.8). 

The EL spectrum has multiple peaks when more than one mode of the cavity overlaps the free-space emission spectrum. It is possible to realize a white LED with a single electroluminescent material such as Alq by employing a two-mode microcavity device structure in which one of the modes is centered near 480 nm and the other near 650 nm. Such an electroluminescence spectrum, for which the CIE coordinates are (0.34, 0.386),13 is shown in Fig. 4.6. The approximate spectrum calculated with Eq. (4) is also shown in Fig. 4.6. With very minor changes in the device design, it is easy to achieve (0,33, 0.33). For comparison, the CIE coordinates of a noncavity Alq LED are (0.39, 0.56). 

Ihnable laser oscillator A laser resonator, or cavity, integrating intracavity frequency selective elements such as gratings, etalons, or prisms, or a combination of these. Usually this definition applies to laser devices capable of narrow-hnewidth, or single-longitudinal mode, emission. 

---