  We report on the site-selected growth of bright single InAsP quantum dots
embedded within InP photonic nanowire waveguides emitting at telecom
wavelengths. We demonstrate a dramatic dependence of the emission rate on both
the emission wavelength and the nanowire diameter. With an appropriately
designed waveguide, tailored to the emission wavelength of the dot, an increase
in count rate by nearly two orders of magnitude (0.4kcps to 35kcps) is obtained
for quantum dots emitting in the telecom O-band. Using
emission-wavelength-optimised waveguides, we demonstrate bright, narrow
linewidth emission from single InAsP quantum dots with an unprecedented tuning
range from 880nm to 1550nm. These results pave the way towards efficient single
photon sources at telecom wavelengths using deterministically grown InAsP/InP
nanowire quantum dots.
