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A Compact Immersion Grating Spectrometer with Quantum Capacitance Detectors for Space-Borne Far-IR Spectroscopy Project

Metadata Updated: October 4, 2023

<p>SPECTROMETER:&nbsp; The grating spectrometer uses a curved grating fabricated on a high resistivity silicon wafer. Light will be coupled in via a silicon immersion lens and coupling waveguide. The wafer profile, including the grating facets are defined by photolithography and deep reactive etching (DRIE) and the wafer is metallized on both sides for better light confinement (except in the regions below where the detector antennas will be placed).&nbsp; The grating both focuses and diffracts the light in the plane of the wafer to a focal arc, where the detectors are positioned. QCD DETECTOR ARRAY: The Quantum Capacitance Detector is a mesoscopic superconducting device that exploits its extreme susceptibility to the presence of quasiparticle excitations arising from pair-breaking radiation to enable background limited detection.&nbsp; QCDs have demonstrated photon noise limited performance&nbsp; at 1.5THz for optical loadings 10-20 to 10-17W.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The detector die will be placed directly on top of the spectrometer wafer and will have an array of QCDs with antennas positioned at the focusing spots of each wavelength.&nbsp; Each detector will be coupled to a superconducting resonator with a different resonant frequency to allow for frequency multiplexing with a single feedline coupling the RF signal to all resonators.&nbsp; A&nbsp; prototype with 32 spectral channels will be demonstrated</p>

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Metadata Created Date November 12, 2020
Metadata Updated Date October 4, 2023

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date October 4, 2023
Publisher N/A
Identifier TECHPORT_16830
Data First Published 2013-10-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
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Metadata Catalog ID
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Catalog Describedby
Harvest Object Id e3740809-637f-4873-a10f-6d9e5d2d6f2f
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Program Code 026:000
Related Documents,,,,,,,
Source Datajson Identifier True
Source Hash 88944b9a90477ab77a36b2252f9a34d13670f84fa1dd44bbb8694919e0adc3d6
Source Schema Version 1.1
Temporal 2013-10-01T00:00:00Z/2014-10-01T00:00:00Z

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