KOSEN 한인과학기술자네트워크

Ultraviolet/Infrared Detectors for Active Protection Primary Sponsor: Department of Defense Deadline: 4/11/2001 KEYWORDS TECHNOLOGY AREAS: Information Systems, Sensors OBJECTIVE: To develop a multicolor detector/sensor that operates in both the solar blind, ultraviolet spectral region and the far infrared spectral region. This combination of spectral regions will enable detection and tracking of kinetic energy projectiles from the initial fire such that an active protection system can be enabled for the Army’s Future Combat System. DESCRIPTION: The Army’s Future Combat System will forgo the heavy armor of current treaded vehicles and rely on an active response to avoid being hit by hostile fire. An important element of active protection is the ability to rapidly detect and track an incoming round such that the response system has sufficient time to respond. Over the past five years much improvement has been made in the area of uncooled infrared (IR) sensors as well as sensors in the ultraviolet (UV) spectral region. While a UV detector in the solar blind spectral region (230 – 290 nm) would be useful for active protection due to the lack of clutter in this region, fast photodetectors in a very wide spectral regions are critical here. For a kinetic energy fire, the round is frequently lost in the background of the blast, in both the visible and infrared (IR) spectral regions, but not in the UV region. On the other hand, the IR signal is useful in initial detection of a detonation. The objective of this STTR would be to develop low cost imaging devices that respond to both the IR and the UV. Because of the small time required to detect, track, and reply to an incoming round, it is desirable to have the UV and IR perfectly aligned to avoid time delays required for computational pixel registration. The UV and IR technologies would have to be integrated such that each pixel would be both a UV and IR detector. There are three major tasks involved in this project: 1) Research and fabrication of UV detectors in the solar blind spectral region; 2) research and fabrication of uncooled IR detectors; and 3) schemes to the integration and hybridization of the two detectors in a low cost device that will have the pixel by pixel registration mentioned above. One key to the integration, that may serve for low cost, is the ability to grow on Si substrates. This is a significant challenge in itself due to the large lattice mismatch for most UV detectors and silicon. However, some recently demonstrated progress and further anticipated university contributions should enable this area further. A low cost, dual color sensor with UV and IR spectral bands could become an important component for survivability in future, light weight, highly mobile, tanks and other tactical vehicles. PHASE I: Determine requirements for active protection and demonstrate feasibility of integration of UV and IR, uncooled detectors. PHASE II: Demonstrate system quality imaging in separate UV and IR bands. Develop a small imaging, dual color array with integrated pixels. PHASE III DUAL USE COMMERCIALIZATION: Demonstrate large size (60,000 pixel) imaging array with UV and IR pixels. This detector sensor would also have military applications in general as well as strategic surveillance. Spinoffs from this development, separate UV and IR arrays, would have a plethora of uses including: general surveillance, navigation on the sea, night driving, product analysis, etc. REFERENCES: 1. E. M. Gullikson, R. Korde, L. R. Canfield, and R. E. Vest, "Stable silicon photodiodes for absolute intensity measurements in the VUV and soft x-ray regions," Journal of Electron Spectroscopy and Related Phenomena 80 (1996) 313-316. 2. E. Monroy, J. A. Garrido, E. Muñoz, I. Izpura, F. J. Sánchez, M. A. Sánchez-García, E. Calleja B. Beaumont, Pierre Gibart, "Characterization and Modeling of Photoconductive GaN Ultraviolet Detectors, MRS Internet J. Nitride Semicond. Res. 2, (1997) 12. 3. M.A. Johnson, Z.H. Yu, J.D. Brown, F.A. Koeck, N.A. El-Masry, H.S. Kong, J.A. Edmond, J.W. Cook, and J.F. Schetzina, "A Critical Comparison Between MOVPE and MBE Growth of III-V Nitride Semiconductor Materials for Optoelectronic Device Applications," MRS Internet Journal of Nitride Semiconductor Research; 4S1(1999)G5.10. 4. G. Xu, X.M. Fang, P.J. McCann, Z. Shi, "MBE growth of wide band gap Pb1-xSrxSe on Si(111) substrate," J. Crystal Growth, 209 (2000) 763-766. 5. W. Radford, M. Ray, R.H. Wyles, J. Wyles, J. Varesi, D. Murphy, a. Kennedy, K. Hay, and J. Finch, "High sensitivity 320x240 (25um pitch) microbolometer FPAs," Proc. 1999 Meeting MSS Specialty Group on Infrared Detectors (1999) 367-376. KEY WORDS: Uncooled infrared, ultraviolet detectors, solar blind DoD Notice: Between January 2 and February 28, 2001, you may talk directly with the DoD scientists and engineers who authored the solicitation topics, to ask technical questions about the topics. The Topic Author is listed in the box below. For reasons of competitive fairness, direct communication between proposers and topic authors is not allowed after February 28, 2001, when DoD begins accepting proposals under this solicitation. Technical Point of Contact: William W. Clark, III,br> Phone: 919-549-4314 Fax: 919-549-4310 Email: clarkww@arl.aro.army.mil After February 28, 2001 proposers may still submit written questions about solicitation topics through the SBIR/STTR Interactive Topic Information System (SITIS). If you have general questions about DoD SBIR program, please contact the DoD SBIR Help Desk at (800) 382-4634 or email to SBIRHELP@teltech.com. NOTE: The Solicitations listed on this site are copies from the various SBIR agency solicitations and are not necessarily the latest and most up-to-date. For this reason, you should use the agency link listed below which will take you directly to the appropriate agency server where you can read the official version of this solicitation and download the appropriate forms and rules. The official link for this solicitation is: http://www.acq.osd.mil/sadbu/sbir/sttr01/dod_sttr01.htm. DoD will begin accepting proposals on March 1, 2001. The solicitation closing date is April 11, 2001.