1. Department of Electrical Engineering, Institute for Lasers, Photonics and Biophotonics, University at Buffalo, State University of New York, Buffalo, New York 14260
2. Institute for Lasers, Photonics and Biophotonics, University at Buffalo, State University of New York, Buffalo, New York 14260
3. Department of Chemical Engineering, Institute for Lasers, Photonics and Biophotonics, University at Buffalo, State University of New York, Buffalo, New York 14260
4. Institute for Lasers, Photonics and Biophotonics, 428 NSC Building, The University at Buffalo (SUNY), Buffalo, New York 14260—3000, website: www.photonics.buffalo.edu, Phone: 716–645‐4148, Fax: 716–645‐6945