Ms. Adina Golden Profile

Adina Golden

at Massachusetts Institute of Technology

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 October 2024 Presentation + Paper

AB-stacked bilayer graphene for hyperspectral LWIR imaging

E. McVay, Z. Lu, A. Golden, L. Ju, T. Palacios

Proceedings Volume 13149, 1314902 (2024) https://doi.org/10.1117/12.3028186

KEYWORDS: Graphene, Excitons, Tunable filters, Sensors, Absorption, Reconstruction algorithms, Hyperspectral imaging, Photocurrent, Electric fields

Read Abstract +

The development of low size, weight, and power (SWAP) long wave infrared (LWIR) hyperspectral imaging tools is challenging due to a need for either heterogenous integration of bandwidth limited pixels, dispersive filtering, or time varying spectral filtering (i.e. FTIR). Ideally, a high information yield, low SWAP imager should have high spatial resolution and temporal resolution as well as spectral sensitivity and require few hardware components. An imager composed of electrically tunable stacked graphene may be able to address many of these requirements. AB stacked bilayer graphene (BLG) exhibits bright exciton resonances at the 1s (P₁) and 2p (P₂) exciton states. These exciton resonances result in large peaks in the photocurrent, and previous works have shown that the location of these excitons can be tuned across the 10μm to 20μm spectral band by applying a vertical electric field across a gate/insulator/BLG/insulator/gate stack. An array of bilayer graphene infrared detectors can be individually gate-tuned to create a set of devices that each have a unique responsivity as a function of wavelength. Our work is the first to show via simulations based on experimentally measured, spectrally resolved bilayer graphene pixel responsivity data that complex spectral signatures can be reconstructed from 650cm^-1 to 750cm^-1 using fewer than 25 bilayer graphene detectors. Spectra reconstructions were performed using an Elastic Net algorithm that solves a least-squares minimization problem with additional L1 and L2 norm penalty terms. Then, we show for the first time that a single bilayer graphene pixel cooled to 80K can be used to detect the presence of atmospheric concentrations of CO₂ either by direct evaluation of the pixel’s photocurrent or through the Elastic Net reconstruction technique which relies on previous characterization of the detector’s responsivity as a function of gate voltage and wavelength.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years