We report on near infrared semiconductor nanopatch lasers with subwavelength-scale physical dimensions (0.019 cubic wavelengths) and effective mode volumes (0.0017 cubic wavelengths). We observe lasing in the two most fundamental optical modes which resemble oscillating electrical and magnetic dipoles. The ultra-small laser volume is achieved with the presence of nanoscale metal patches which s...

We demonstrate a technique for frequency measurements of atomic transitions with a precision of 30 kHz. The frequency is measured using a ring-cavity resonator whose length is calibrated against a reference laser locked to the D2 line of Rb, the frequency of which is known to 10 kHz. We have used this to measure the hyperfine structure in the 5P3/2 state of Rb. We obtain precise values for the ...

There have been several demonstrations of frequency stabilized lasers operating in the important 1.5-,ttm telecommunications window. Techniques include absolute frequency stabilization using atomic lines' and frequency locking to the resonance peak of a reference cavity using either the transmitted laser field2 or the reflected laser field. 3'4 For application to wavelength-division-multiplexed...

The work is devoted to the development and study of antenna array based on Fabry-Perot cavity in radio band. element form a with circular polarization proposed, semitransparent mirror realized two-layer frequency-selective surface (FFS). A power divider thin waveguides feed size 2x8 was developed. А model manufactured. made by laser cutting sheet aluminum, resonator layer photolithography. tota...

We demonstrate a sideband-resolved cavity electromechanical system operating at room temperature. The mechanical resonator, strongly pre-stressed silicon nitride string, is dielectrically coupled to three-dimensional microwave made of copper. coupling characterized by two measurements, the cavity-induced eigenfrequency shift resonator and optomechanically induced transparency. While former domi...

We report the design, growth, and characterization of an AlGaInP-based VECSEL, designed to be optically-pumped with inexpensive high power blue InGaN diode laser, for emission around 689 nm. Up 140 mW output is achieved in a circularly-symmetric single transverse (TEM 00 ) longitudinal mode, tunable from 683 693 With intensity stabilization pump frequency-stabilization VECSEL resonator referenc...

We show how the coherent oscillations of a nanomechanical resonator can be entangled with a microwave cavity in the form of a superconducting copla-nar resonator. Dissipation is included and realistic values for experimental parameters are estimated.

introduction: marginal seal integrity is important for a successful adhesive dental restoration. alterations caused by laser irradiation in the enamel and dentin surface can affect the marginal integrity of adhesive restorations. the aim of this study was to evaluate the microleakage of a composite resin restoration in primary teeth following laser irradiation of enamel and dentin. methods: for...

We generalize the Robinson stability criteria, for a charged particle beam interacting with the radio-frequency cavity resonator that is responsible for accelerating it, to the case that the resonator is equipped with a delayed voltageproportional feedback.