Superconducting on-chip spectrometers at sub-millimeter wavelength

We propose an on-chip spectrometer camera for sub-millimeter astronomy. The camera will be installed to the focal plane of a telescope and be operated at 0.1 K. The camera is composed of three kinds superconducting circuits, such as wideband antennas, band pass filters (BPFs), and Microwave Kinetic Inductance Detectors (MKID) [1]. All components are fabricated on the same chip by the standard photolithographic techniques. Sub-mm photons are introduced to the chip by the antenna, are divided into three colors by three BPFs. The signal are finally measured with MKID by breaking cooper pairs in the superconducting film.