Fig. 2(Color online) (a) Experimental transmittance spectra for RH-CLCs by use of spectrophotometer with unpolarized light source. RH-CLCs are composed of host 6CHBT nematic liquid crystal with a dextrorotatory chiral dopant of R1011, whose doping concentration are 8.0 wt%, 6.6 wt%, 5.6 wt% and 5.0 wt%. (b) Theoretical transmittance spectra, corresponding to
(a), from which we estimate the pitches for each central wavelengths as follows:
p8.0wt%=301 nm,
p6.6wt%=361 nm,
p5.6wt%=415 nm and
p5.0wt%=460 nm.