  We report on the variability of rotation periods of solar coronal layers with
respect to temperature (or, height). For this purpose, we have used the
observations from Atmospheric Imaging Assembly (AIA) telescope on board Solar
Dynamics Observatory (SDO) space mission. The images used are at the
wavelengths 94 {\AA}, 131 {\AA}, 171 {\AA}, 193 {\AA}, 211 {\AA}, and 335 {\AA}
for the period from 2012 to 2018. Analysis of solar full disk images obtained
at these wavelengths by AIA is carried out using flux modulation method.
Seventeen rectangular strips/bins at equal interval of 10 degrees (extending
from 80 degree South to 80 degree North on the Sun) are selected to extract a
time series of extreme ultraviolet (EUV) intensity variations to obtain
auto-correlation coefficient. The peak of Gaussian fit to first secondary
maxima in the autocorrelogram gives synodic rotation period. Our analysis shows
the differential rotation with respect to latitude as well as temperature (or,
height). In the present study, we find that the sidereal rotation periods of
different coronal layers decrease with increasing temperature (or, height).
Average sidereal rotation period at the lowest temperature (~ 600000 Kelvin)
corresponding to AIA-171 {\AA} which originates from the upper transition
region/quiet corona is 27.03 days. The sidereal rotation period decreases with
temperature (or, height) to 25.47 days at the higher temperature (~10 million
Kelvin) corresponding to the flaring regions of solar corona as seen in AIA-131
{\AA} observations.
