1. National Institute of Standards and Technology, Quantum Electronics and Photonics Division, 325 Broadway Street, Boulder, Colorado 80305, United States
2. National Institutes of Health, Laboratory of Malaria and Vector Research, 9000 Rockville Pike, Bethesda, Maryland 20892, United States
3. National Institute of Standards and Technology, Sensor Science Division, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States