Spatially resolved micro-spectrometer for hybrid integrated photonic materials
Abstract
We propose to build an in-situ micro-spectrometer for the integrated photonic devices, monitoring the device-specific light emission responses from the active material region. The hybrid integrated material strongly coupled to the guided modes in the substrate, playing a central role for optoelectronic conversion in the active devices. The active region, typically micrometer size, set the speed and energy efficiency limitations for integrated photonic modulators, detectors, memories, and lasers. With the size reduction down to micrometer scale, spatial and temporal variations among the devicesÕ responses are often observed in the same wafer, including both optical insertion loss and optoelectronic conversion efficiencies. The unexpected device performance variations are attributed to the chemical or structural modification of the material, along with the device dependent strain and surface defects. The conventional fiber-coupled test platform only provides the accumulated response of the transmitted light from input to output fiber, which provides limited information on the transience or permanent structural modifications of the material in different locations. The upgraded system can (1) provide the spatially resolved optical material response on the device under test; (2) map the stoichiometry uniformity and defects distributions along the waveguide, especially the charge nonuniformity induced by edge states or interfacial defects; (3) correlate the spatially resolved material modifications and the collective optoelectronic response with fiber excitation; (4) allow both in-plane and vertical excitations at both telecommunication and visible bandwidth, to locate the optimal working wavelength range of the hybrid devices; (5) guide the material selection and preparation for the target performance matrix for integrated photonic circuits and systems.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 24, 2023
- Source ID
- W911NF2310075
Entities
People
- Tingyi Gu
Organizations
- Army Contracting Command
- United States Army
- University of Delaware