Organic thin-film optical integrated circuit

Provided is an organic thin-film optical integrated circuit which is flexible and is capable of supporting visible light as well. An organic thin film optical integrated circuit (1) comprises an optical waveguide (10), a light receiver (20), a modulator (30), an optical switch (40), and a metal grating coupler (50) formed by a monolithic integration technique on an organic thin film (2). The light receiver (20) has: a lower cladding layer (21) made of a polymer; a two-dimensional material (22) two-dimensionally arranged in a functional region (60) on the lower cladding layer (21); a core layer (23) made of a polymer and laminated in the two-dimensional plane of the two-dimensional material (22); an upper cladding layer (24) made of a polymer and laminated with the core layer (23) embedded; and a first electrode (25) and a second electrode (26) sandwiching the core layer (23).