The Laboratory for Security Science and Engineering at University of Nevada, Las Vegas(UNLV) invites applications for immediate postdoctoral positions in optical sensing research. Applicants should have received Ph.D, or completed Ph.D dissertation in physics, electrical engineering, mechanical engineering, or a related science and engineering field. Strong skills in fiber optics and electronics laboratory, and ability in theoretical research are expected. Experiences in optical metrology of time and frequency references are a plus. US citizenship is required due to government contract. Perspective candidates should send a statement of interest, a CV, and 2~3 names of references to: Professor Ke-Xun Sun, UNLV ECE M/S 4026, 4505 S. Maryland Pkwy., Las Vegas, NV89154-4026, email: Ke-Xun.Sun@unlv.edu.