Resonance tuning

Gerber, S., Reil, F., Hohenester, U., Schlagenhaufen, T., Krenn, J. R., and Lcitner, A. (2007). Tailoring light emission properties of fluorophores by coupling to resonance-tuned metallic nanostructures. Physical Review B 75 073404-073404. 

Mixing between resonances tuned by rotational excitation... 

In this paper we discuss the resonance tuning hypothesis as an Important mechanism whereby resonances are spread in the F-t-H, and F-+ D2 reaction systems and examine whether the shift from backward to sideways scattering of the HF and DF products Is a resonance signature. All results are obtained using the Muckerman 5 potential surface. 

In Figure 3 the primitive probability functions clearly show Indications of the resonance tuning effect alluded to above. It Is also seen that the resonant peak broadens and shifts to higher energy as the value Is Increased (for fixed y). However, for y=50 , there does not appear to be a resonance. Finally, we note that the height of the y=0, 1=10 result suggests an even longer lived resonance than In 1=0,y=0 (however, we shall see that In fact, the time delay Is less for y=0, 1=10). 

The central remaining question to be addressed is what is the role of resonance tuning in the angular distribution of the F-t-H2 reaction. 

Among the types of equipment built were the inductor-alternator with step-up transformer and parallel-resonant tuned circuit, the SCR inverter with step-up transformer, and the mobile vacuum tube high power-amplifier. In the discussion of this equipment which follows, it is intended only to consider some of the major components of a corona power supply and to outline to the chemist and the chemical engineer a general approach to audiofrequency power generation. Without the full details of a particular application, it is impossible to select the most... 

WALTZ-16 sequence (Chapter 10). A 0.3 Hz line broadening is used and the noise recorded over the same region, with the peak height determined for the tallest aromatic resonance. Tuning of the proton coil and appropriate calibration of the proton decoupling pulses are required in this case for optimum results. Test samples for other common nuclei are summarised in Table 3.8. Should you have frequent interests in other nuclei, a suitable standard should be decided upon and used for future measurements. 

Without a thermal radiation field in the resonantly tuned cavity, the populations N n,T) and N(n — I, T) of the Rydberg levels should be a periodic function of the transit time T = djv, with a period Tr that corresponds to the Rabi oscillation period. The incoherent thermal radiation field causes induced emission and absorption with statistically distributed phases. This leads to a damping of the Rabi oscillation (Fig. 9.75b). This effect can be proved experimentally if the atoms pass a velocity selector before they enter the resonator, which allows a continuous variation of the velocity and therefore of the transit time T = d/v. n Fig. 9.76 the schematic drawing of the experimental setup with microwave resonator, atom source and detector is shown. 

The first successful experimental realization of squeezing was reported by Slusher and coworkers [1335], who used the four-wave mixing in a Na-atomic beam as nonlinear process (Fig. 9.99). The Na atoms are pumped by a dye laser at the frequency coi = co )8, which is slightly detuned from the resonance frequency coq. In order to increase the pump power, the Na beam is placed inside an optical resonator tuned to the pump frequency co]. Because of parametric processes (Vol. 1, Sect. 6.7) of the two pump waves (coi, A l) inside the resonator, new waves at u)l are generated at this four-wave mixing process (signal and idler wave). Conservation of energy and momentum demands... 

The essential components of an NMR spectrometer are an exceptionally stable magnet, a tunable source of RF, a high-power broadband amplifier, a high-sensitivity resonantly tuned coil surrounding the sample, and a computer for rapid data acquisition and analysis. Samples may be solids, liquids, or gases. Solutions (millimoles to moles per liter) are most widely used. There are four basic steps in an NMR experiment, as described below. 

Fig. 2 shows the applied experimental set-up. A synchronously pvunped mode-locked dye laser generates light pulses of 20 ps duration. The pulse rate is reduced to Uo kHz by a cavity-dumper in order to realize a single pulse experiment. The dye laser is resonantly tuned to the Di-line... 

Transmission Line Sections Discontinuities Impedance Transformers Terminations Attenuators Microwave Resonators Tuning Elements Hybrid Circuits and Directional Couplers Filters Ferrite Components Passive Semiconductor Devices... 

In optical devices regular arrays of nano-clusters give a very sharp resonance signal due to the large number of cooperative interactions in between the particles. Whereas this effect allows precise resonance tuning the same cooperative effect limits the dynamic range of the reaction if used for direct analyte detection. E.g. DNA-covered nano-clusters... 

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