Abstract: There are provided a light-emitting element, an optical detection module, a method for manufacturing a light-emitting element, and a scanning electron microscope using the same, by which it is possible to reduce crosstalk and expand the range of applications. A light-emitting element includes a fiber optic plate substrate having transparency to fluorescence and a light-emitting layer as a nitride semiconductor layer having a quantum well structure. In the light-emitting element, the fiber optic plate substrate and the light-emitting layer are directly bonded to each other.

Abstract: A light emitter is a light emitter for converting incident electrons into light, and includes a multiple quantum well structure for generating the light by incidence of the electrons, and an electron incident surface provided on the multiple quantum well structure. A certain barrier layer included in a plurality of barrier layers constituting the multiple quantum well structure is thicker than another barrier layer included in the plurality of barrier layers and located on the electron incident surface side with respect to the certain barrier layer.

Abstract: An electron tube 10 is provided with: an MCP (electron multiplier) 14 which includes a multiplying portion 16 having a large number of microscopic holes for electron passage that can emit secondary electrons and a peripheral portion 18 that surrounds multiplying portion 16; and with a vacuum closed container 12 enclosing at least multiplying portion 16 of MCP 14. Thus, peripheral portion 18 of MCP 14 forms at least a portion of sidewalls 22 of vacuum closed container 12. Multiplying portion 16 is increased in size in this configuration in comparison with configurations having the same outer dimensions that accommodate the entirety of an MCP inside of vacuum closed container 12.

Abstract: In the microchannel 50, a conductive film 52 is formed on an electron input surface of a dynode 51 where the plurality of channels are arranged. The conductive film is made of material that can transmit light that has originated photoelectrons and that has a refractive index lower than that of the dynode constituting material.