OBSERVATION METHOD, INCIDENT TIMING SETTING METHOD, AND OBSERVATION DEVICE

摘要

PROBLEM TO BE SOLVED: To observe a sample with high contrast in the observation of an observation range containing a region where a sample is present and a region where the sample is not present.;SOLUTION: This observation method includes the step of irradiating the observation range containing the sample A with a pulselike terahertz wave L₂ to apply the first electromagnetic wave L₂, which is reflected from or transmitted through the observation region, and a pulselike second electromagnetic wave L₁, of which the wavelength is shorter than that of the terahertz wave L₂, to an optical crystal 8 and the step of detecting the second electromagnetic wave L₁ emitted from the optical crystal 8. The second electromagnetic wave L₁ is applied to the optical crystal 8 in the timing arranged to a phase wherein one of the electric field amplitude of the first electromagnetic wave L₂ reflected from or transmitted through the sample A present in the observation region and the electric field amplitude of the first electromagnetic wave L₂ reflected from or transmitted through a region other than the sample A in the observation range becomes larger than the other one of them.;COPYRIGHT: (C)2011,JPO&INPIT