Spectra waveguide

Figure 9-31. Raman speclra in m-LPPP waveguides obtained at dillerenl laser wavelengths as depicted in the figure. The bottom spectrum shows the result of a conventional cw Raman experiment -from Ref. 1147 (.

Fig. 8a-f. Evolution of emission spectra from waveguides with increasing excitation intensity for films with a-c 2 wt% d-f 10 wt% Rd/dendrimer content. The intensity increased for each spectrum from the bottom as follows 1.7,2.1, and 4.0 mj/cm ... 

The typical way to open a billiard is to attach some reservoirs with continuous energy spectrum, for example, the leads or microwave waveguides, as shown in fig. 3 below. Full information about the scattering properties of the billiard is given by the scattering wave function which is a solution of the Schrodinger equation Hip = Exp with the total Hamiltonian... 

Radiation is derived from a sealed quartz tube containing a few milligrams of an element or a volatile compound and neon or argon at low pressure. The discharge is produced by a microwave source via a waveguide cavity or using RF induction. The emission spectrum of the element concerned contains only the most prominent resonance lines and with intensities up to one hundred times those derived from a hollow-cathode lamp. However, the reliability of such sources has been questioned and the only ones which are currently considered successful are those for arsenic, antimony, bismuth, selenium and tellurium using RF excitation. Fortunately, these are the elements for which hollow-cathode lamps are the least successful. 

Fig. 2.1 Basic microring resonator structures and their output characteristics, (a) One ring resona tor and one bus waveguide and (b) the corresponding resonance spectrum at the through port, (c) One ring resonator and two bus waveguides and (d) the corresponding resonance spectrum at the through port and drop port. Reprinted from Ref. 15 with permission. 2008 Institute of Electrical and Electronics Engineers...

To demonstrate Fano-resonant behavior, a polystyrene microring resonator is nanoimprinted and two waveguide offsets are introduced in the bus waveguide, which provide partial reflection as shown in Fig. 8.22. Its spectrum is plotted in Fig. 8.23 together with the one without waveguide offsets. The slope is enhanced... 

Fig. 9.15 A ring resonator sensor interrogation circuits with (a) one bus waveguide, and (b) two bus waveguides. The plots give a qualitative indication of the typical intensity spectrum that would be observed at the respective output ports...

Fig. 9.16 The calculated output spectrum of a silicon waveguide ring resonator sensor at critical coupling (t a) and for t 0.8a. The assumed ring radius is R 150 pm...

Sumetsky, M., Uniform coil optical resonator and waveguide transmission spectrum, eigen modes, and dispersion relation, Opt. Express 2005, 13, 4331 4340... 

Fig. 16.3 Simulation of transmission spectrum for a four resonator array. FDTD simulation showing the steady state electric field distributions when the device is excited at the (a) resonant wavelength and (b) nonresonant wavelength. Note that the color levels in this image are scaled to the maximum field intensity in each image not to each other. The field levels in (b) are roughly of 20 times greater magnitude than those shown in (a), (c) Output spectrum for a device consisting of a waveguide with four evanescently coupled side cavities adjacent to it. Here each resonator consists of a cavity with four holes on either side. Reprinted from Ref. 37 with permission. 2008 Optical Society of America...

A typical, experimentally obtained, output spectrum of a waveguide with five resonators of differing sizes is shown in Fig. 16.5a. In this first case, all the five resonators had water as the surrounding medium. As can be seen, each resonator contributes a sharp dip to the output spectrum of the device. We observe that each ID resonator possesses a large -factor varying from 1,500 to 3,000 and a full... 

Fig. 16.5 Response to refractive index interrogation of a single NOSA waveguide, (a) Output spectrum for a NOSA where one of the five resonators is fluidically targeted, first with water and then with a CaCl2 solution. The resonance of the targeted resonator shifts toward the red end of the spectrum due to the higher refractive index of the CaCl2 solution, (b) Experimental data (with error bars indicating inter device variability) showing the redshifts for various refractive index solutions. The solid line is the theoretically predicted redshift from FDTD simulations. The experimental data is in excellent agreement with the theory. Reprinted from Ref. 37 with permission. 2008 Optical Society of America...

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