# Partially-levitated membranes for high-frequency gravitational wave (HFGW) detection

- Institution: CERN
- Department: TH institutes
- Speaker: Christoph Reinhardt
- Year: 2023
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3020055)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Patterned thin films that are freely suspended from a silicon chip (i.e., membranes) are some of the lowest-loss mechanical oscillators.

As such, they provide an exceptional level of isolation from the noisy environment, similar to what has been achieved with levitated nanoparticles.

Here, I will present a concept for a HFGW detector, which corresponds to a Michelson interferometer with a membrane incorporated in each arm cavity.

In addition to explaining the underlying operating principle, I will provide details on achieving a sensitivity comparable to the target for the Levitated Sensor Detector, which relies on optically levitated stacks instead of membranes. (see dedicated talks).

In this regard, a particular focus will be on realizing suitable membranes, which requires significantly reducing their intrinsic loss..

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## Lectures

1. [Partially-levitated membranes for high-frequency gravitational wave (HFGW) detection](https://invisiblenetwork.ai/learn/cern/3020055/26ef892ffcef), 27 min (CERN's player)