selleck chemical Table 1.Quality factor, frequency, wavelength, wavelength spacing between neighbouring high-Q modes and modal volume for a periodicity of a = 480 nm. S stands for symmetric and A read me stands for anti-symmetric in the (x,y,z) directions. The index i represents group …Note that all four mode symmetries are equally represented Inhibitors,Modulators,Libraries and that for almost all modes Q > 1 �� 106. For all four possible symmetries there are high and ultrahigh-Q modes and all of them are limited by out-of-plane losses. For example, the in-plane Q for the SSA0 mode is QII = 108 and the limiting out-of-plane Inhibitors,Modulators,Libraries component is Q = 1.01 �� 106. This ratio of the partial Qs contribution is similar for all modes presented here.

The highest quality factors are obtained for the second set of modes (with subscript 1 in Table 1), for Inhibitors,Modulators,Libraries which Q > 2 �� 106 for all four symmetries.

The modal volume is in the range 1.68 to 4.89 (��/n)3. These values are considered relatively small for the band-edge type modes. The modes’ resonant wavelengths are calculated for a fixed period a = 480 nm in order to operate around �� = 1,550 nm. For this particular periodicity mode spacing ranges between 0.4 nm Inhibitors,Modulators,Libraries and 10.6 nm.In Figure 2(a,c) we show the major electric field components Ex and Ez, in the plane for the first four ultrahigh-Q cavity modes, namely SSS0, ASA0, ASS0 and SSA0. Though not shown on the scale of the figures, a large fraction of the field is located within air-holes as expected for the air-band edge modes.

Inhibitors,Modulators,Libraries In Figure 2(b,d) we show the Fourier transforms of Figure 2(a,c), respectively, with a circle indicating the light-cone.

The field within the leaky light-cone region is insignificant as required for high-Q cavity modes [20].Figure 2.The major electric field components, (a) Ex and (c) Ez, in the plane and its Inhibitors,Modulators,Libraries Fourier transforms (b) Ex and (d) Ez for the first four ultrahigh-Q cavity modes SSS0, ASA0, ASS0 and SSA0. The number of infiltrated circles Inhibitors,Modulators,Libraries around the central hole is N = 6 …So far we have shown results for cavities with six rings infiltrated around the central hole. Decreasing the cavity size decreases the Q. For example varying the number of rings around the central hole infiltrated from two to six the quality factor increases from Q = 5.50 �� 105 to Q = 1.20 �� 106 for the ASA1 mode.

Decreasing the size of the infiltrated region decreases the Q, but the modal volume does not change significantly.

This behaviour is similar to that of infiltrated double-heterostructure type cavities [3]. Increasing Anacetrapib the refractive index of infiltrated material Ganetespib purchase decreases the Q. For example, if the Inhibitors,Modulators,Libraries cavity is formed Brefeldin_A by material of the refractive index of nh = 1.45, corresponding to a typical polymer, the Q of the ASA1 mode decreases from Q = 1.20 �� 106 to http://www.selleckchem.com/products/Calcitriol-(Rocaltrol).html Q = 6.29 �� 105. This decrease is due to out-of-plane losses, as the refractive index difference between the air-silicon and liquid-silicon is decreased.