REFLECTOMETRIC INTERFERENCE SPECTROSCOPY METHOD AND DEVICE FOR DETECTING INTERMOLECULAR INTERACTION

In order to calculate and specify a valley wavelength easily and in a short period of time, a detection device (1) for intermolecular interaction is disclosed that is equipped with a detector (10) provided with a ligand, a white light source (20) that irradiates the detector (10) with white light, a spectrometer (30) that detects the light reflected from the detector (10), and a control device (50) that controls the white-light source (20) and the spectrometer (30), wherein the aforementioned control device (50) obtain a reflection spectrum by calculating the reflectivity over a fixed wavelength interval, approximates the aforementioned reflection spectrum as a high-dimensional function, selects a wavelength interval comprising the minimum reflectivity from the aforementioned high-dimensional function, approximates the aforementioned high-dimensional function with the aforementioned wavelength interval as a quadratic function of a lower order, and obtains a solution by which the aforementioned quadratic function is differentiated with respect to the wavelength and the value thereof becomes 0.