Dr. Adrien Yeche Profile

Dr. Adrien Yeche

at CEA-LETI

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 | 27 April 2020 Presentation

Discussion around IR material, detection structure and measurement issues to go toward small pixel pitch IR HOT FPAs (Conference Presentation)

Olivier Gravrand, Alexandre Ferron, François Boulard, Adrien Yeche, Sylvette Bisotto, Florent Rochette, Julie Abergel

Proceedings Volume 11407, 114070W (2020) https://doi.org/10.1117/12.2564572

KEYWORDS: Modulation transfer functions, Infrared imaging, Infrared materials, Quantum efficiency, Sensors, Staring arrays, Image resolution, Image sensors, Infrared sensors, Diffusion

Read Abstract +

In the last decade, IR imaging detector trend has gone for smaller pixels and larger formats. Most of the time, this scaling is carried out at given total sensitive area for a single focal plane array (FPA). As an example, QVGA 30µm pitch and VGA 15µm pitch exhibit the exact same sensitive area. SXGA 10µm pitch tends to be very similar as well. This increase in format is beneficial to image resolution. However, this scaling to even smaller pixels raises questions because the pixel size becomes similar to the IR wavelength but also to typical transport dimensions in the absorbing material. Hence, maintaining resolution for such small pixel pitches requires a good control of the modulation transfer function (MTF) and quantum efficiency (QE) of the array, while decreasing the pixel size. This might not be obtained just scaling the pixel dimensions. As an example, bulk planar structures suffer from excessive lateral diffusion length inducing pixel-to-pixel cross talk and thus degrading MTF. Non-bulk semiconductor materials such as colloidal quantum dots might exhibit much smaller cross talk due to weak transport properties, but it usually strongly degrades the accessible QE. On the other side, mesa structures might minimize cross-talk physically separating pixels, but also tends to degrade the QE due to non-negligible pixel fill factor shrinking down the pixel size. This paper intend to discuss those issues, taking into account different material systems and structures, in the perspective of expected future pixel pitch IR FPAs. This paper also introduces an important issue in this context: how to reliably measure the MTF of those small pitch detectors. As an answer to this question we will share our first investigations of MTF measurement using the electron beam of an SEM instead of a photon beam (EBIC measurement)

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