In this book the applicability and the utility of two statistical approaches for understanding
dark energy and dark matter with gravitational lensing measurement are introduced.For
cosmological constraints on the nature of dark energy morphological statistics called
Minkowski functionals (MFs) to extract the non-Gaussian information of gravitational lensing
are studied. Measuring lensing MFs from the Canada-France-Hawaii Telescope Lensing survey
(CFHTLenS) the author clearly shows that MFs can be powerful statistics beyond the
conventional approach with the two-point correlation function. Combined with the two-point
correlation function MFs can constrain the equation of state of dark energy with a precision
level of approximately 3-4 % in upcoming surveys with sky coverage of 20 000 square degrees.On
the topic of dark matter the author studied the cross-correlation of gravitational lensing and
the extragalactic gamma-ray background (EGB). Dark matter annihilation is among the potential
contributors to the EGB. The cross-correlation is a powerful probe of signatures of dark matter
annihilation because both cosmic shear and gamma-ray emission originate directly from the same
dark matter distribution in the universe. The first measurement of the cross-correlation using
a real data set obtained from CFHTLenS and the Fermi Large Area Telescope was performed.
Comparing the result with theoretical predictions an independent constraint was placed on dark
matter annihilation. Future lensing surveys will be useful to constrain on the canonical value
of annihilation cross section for a wide range of mass of dark matter annihilation. Future
lensing surveys will be useful to constrain on the canonical value of annihilation cross
section for a wide range of mass of dark matter.
