USA flag logo/image

An Official Website of the United States Government

Large Format LADAR Receiver Arrays Based on Near Infrared HgCdTe Avalanche…

Award Information

Department of Defense
Missile Defense Agency
Award ID:
Program Year/Program:
2005 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
EPIR Technologies Inc
590 Territorial Drive, Suite B Bolingbrook, IL -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2005
Title: Large Format LADAR Receiver Arrays Based on Near Infrared HgCdTe Avalanche Photodiodes
Agency / Branch: DOD / MDA
Contract: W9113M-05-C-0102
Award Amount: $99,989.00


Most seeker systems usually operate at long distances. The return laser signal from the target is not only attenuated by absorption, reflection and scattering by air-borne gas, dust and liquid particles, but also by the emissivity and reflectivity variations of the target surface. High bandwidth detectors with internal gain are required. Avalanche photodetectors (APDs) are best suited for this purpose due to their high gain-bandwidth characteristics. Fortunately, the MCT material can be bandgap engineered to achieve a large asymmetry in the hole to electron ionization coefficient. This in turn leads to high gain-bandwidth MCT APDs with minimal excess noise. Using advanced growth technique like molecular beam epitaxy (MBE), it is possible to tailor heterostructure MCT materials that would exclusively use electron ionization or hole ionization. Recent developments in monitoring techniques like in-situ spectroscopic ellipsometry can lead to high quality MCT heterostructures with optimized interfaces. This, in combination with better nucleation methods and other geometric design considerations, make it now possible to grow very low-defect materials. Consequently, it is now possible to produce shot-noise limited MCT APDs that operate over a wide infrared wavelength range in single element and array formats. We propose to use our extensive experience in HgCdTe growth by molecular beam epitaxy and device processing to fabricate large format near infrared (1064nm) HgCdTe avalanche photodiodes on silicon substrates. They will be incorporated into LADAR receiver modules and integrated with MCT-based MWIR/LWIR thermal imagers.

Principal Investigator:

Silviu Velicu
Principal Investigator

Business Contact:

Sivalingam Sivananthan
Small Business Information at Submission:

590 Territorial Drive, Suite B Bolingbrook, IL 60440

EIN/Tax ID: 364196918
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No