The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggesstions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA, 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any oenalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. a. REPORT Infrared Emitters and photodetectors with InAsSb bulk active region 14. ABSTRACT 16. SECURITY CLASSIFICATION OF: Bulk unrelaxed InAsSb alloys with Sb compositions up to 44% and layer thicknesses up to 3 um were grown by molecular beam epitaxy. The alloys showed photoluminescence (PL) energies as low as 0.12 eV at T=13K. The electroluminescence and quantum efficiency data demonstrated with unoptimized barrier heterostructures at T=80 and 150K suggested large absorption coefficient and carrier lifetimes sufficient for the development of long wave infrared photodetectors and emitters with high quantum efficiency. The minority hole transport was found to be 1. REPORT DATE (DD-MM-YYYY) 4. TITLE AND SUBTITLE 15-08-2013 13. SUPPLEMENTARY NOTES The views, opinions and/or findings contained in this report are those of the author(s) and should not contrued as an official Department of the Army position, policy or decision, unless so designated by other documentation. 12. DISTRIBUTION AVAILIBILITY STATEMENT Approved for public release; distribution is unlimited. UU 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 6. AUTHORS 7. PERFORMING ORGANIZATION NAMES AND ADDRESSES U.S. Army Research Office P.O. Box 12211 Research Triangle Park, NC 27709-2211 15. SUBJECT TERMS metamorphic growth, InAsSb, quantum efficiency, long-wave infrared, barrier detector Ding Wang, Youxi Lin, Dmitry Donetsky, Gela Kipshidze , Leon Shterengas, Gregory Belenky, Stefan P. Svensson, Wendy L. Sarney, Harry Hier Research Foundation of SUNY at Stony Brook U Office of Sponsored Programs W-5510 Melville Library Stony Brook, NY 11794 -3362 REPORT DOCUMENTATION PAGE b. ABSTRACT UU c. THIS PAGE UU 2. REPORT TYPE Conference Proceeding 17. LIMITATION OF ABSTRACT UU 15. NUMBER OF PAGES 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 5c. PROGRAM ELEMENT NUMBER 5b. GRANT NUMBER 5a. CONTRACT NUMBER W911NF-12-2-0057 611102 Form Approved OMB NO. 0704-0188 62447-EL.4 11. SPONSOR/MONITOR'S REPORT NUMBER(S) 10. SPONSOR/MONITOR'S ACRONYM(S) ARO 8. PERFORMING ORGANIZATION REPORT NUMBER 19a. NAME OF RESPONSIBLE PERSON 19b. TELEPHONE NUMBER Gregory Belenky 631-632-8397 3. DATES COVERED (From - To) Standard Form 298 (Rev 8/98) Prescribed by ANSI Std. Z39.18 -