Geiger-mode avalanche photodiode arrays fabricated on SOI engineered-substrates

Microlens arrays (MLA) are a critical component of avalanche photodiode (APD) technology, but their performance is rarely characterized or investigated independent of the photodetector. To understand how best to improve coupling, the MLA must be characterized and compared to other technologies on a fair and consistent basis. In order to investigate new designs and compare different types of microlens technologies, a custom microscope was built. This microscope was designed to image the MLA surface as well as its focused beam which required solutions to the following challenges: 6axis manipulation of the sample, sub-micron positional resolution, perpendicular travel to the optical axis, brightfield imaging, multispectral imaging, image processing, uniform irradiance over the sample area, and calibrated absolute optical power measurements. This microscope design enables the focal length range to be mapped with sub-micron accuracy along the paraxial ray. The imaged beam spot is quantitatively analyzed in MATLAB for 1/e 2 diameter and encircled energy, as well as qualitatively with complementary data sets. It was shown that Fresnel lens and plano-convex refractive MLA designs from various material groups could be compared equally in a side-by-side comparison.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Geiger-mode avalanche photodiode arrays fabricated on SOI engineered-substrates

Cited by 3 publications

References 1 publication

Extremely Large Area Integrated Circuit (ELAIC): An Advanced Packaging Solution for Chiplets

Extremely Large Area Integrated Circuit (ELAIC): An Advanced Packaging Solution for Chiplets

A direct-detection LIDAR detector for the Europa lander concept

Microscope design for direct optical characterization of various microlens technologies

Contact Info

Product

Resources

About