Microtaper leaky-mode spectrometer with picometer resolution

Abstract The wide application of optical spectroscopy makes miniaturized spectrometers with fundamental importance. scalability, high-performance, low-cost, and small footprint are still contradicting each other limiting the applicability spectrometer for practical application. Here we propose a compact that satisfies four advantages. device uses fiber taper tip to generate complex leaky mode patterns within 1 mm length. unique correspondence between pattern wavelength operates effectively hundreds nanometers spectral range while providing resolution around ~ pm. integration multiple tips enables hyperspectral imaging applications. working our can be further extended using different materials detectors keeping similar architecture.