United States of America As Represented by the Administrator of Nasa

Karwan Rostem

Edward J Wollack

Kevin L Denis

David T Chuss

Samuel H Moseley

Elissa Williams

Peter deVisser

Rahul Datta

The present invention minimizes issues with transmission lines through the use of a normal-metal/superconducting meta-material structure realized with controlled impedance sub-wavelength line sections, which effectively concentrate the uncertainty in the section lengths in a portion of the termination geometry which has minimal impact on the non-resonant absorption in the structure. The present invention is used to achieve broadband absorption response and signal termination in planar transmission line devices. The longest wavelength sets the required length of the meta-material line, and its footprint is set by properties of the guiding structure (i.e., the resultant line can be folded, meandered, or spiraled with a spacing set is set by the field confinement of the transmission line topology in use).

Broadband metamaterial termination for planar superconducting transmission line circuits

The present invention relates to a plurality of phononic devices and a method of manufacturing thereof. In one embodiment, highly sensitive superconducting cryogenic detectors integrate phononic crystals into their architecture. The phononic structures are designed to reduce the loss of athermal phonons, resulting in lower noise and higher sensitivity detectors. This fabrication process increases the qp generation recombination rate, thus, reducing the noise equivalent power (NEP) without sacrificing the scalability. A plurality of phononic devices, such as a kinetic inductance detector (KID), a transition edge sensor (TES) bolometer, and quarterwave backshort, can be manufactured according to the methods of the present invention.

Phononic devices and methods of manufacturing thereof

The present invention relates to a phononic-isolated Kinetic Inductance Detector (KID) and a method of fabrication thereof. The KID is a highly sensitive superconducting cryogenic detector which can be scaled to very large format arrays. The fabrication process of the KID of the present invention integrates a phononic crystal into a KID architecture. The phononic structures are designed to reduce the loss of recombination and athermal phonons, resulting in lower noise and higher sensitivity detectors.

Phononic-isolated kinetic inductance detector and fabrication method thereof

A phononic filter includes a metamaterial body including a membrane including a crystalline or amorphous dielectric material, an elemental superconductor or an alloyed superconductor; and a plurality of spaced features. The spaced features includes holes, spacings, or apertures in the metamaterial body.

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Baltimore, MD, United States of America

Karwan Rostem