Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Noise-free high-efficiency photon-number-resolving detectors



Danna Rosenberg, Adriana Lita, Aaron J. Miller, Sae Woo Nam


High-efficiency optical detectors that can determine the number of photons in a pulse of monochromatic light have applications in a variety of physics studies, including post-selection-based entanglement protocols for linear optics quantum computing and experiments that simultaneously close the detection and communication loopholes of Bell?s inequalities. Here we report on our demonstration of fiber-coupled, noise-free, photon-number-resolving transition-edge sensors with 88% efficiency at 1550 nm. The efficiency of these sensors could be made even higher at any wavelength in the visible and near-infrared spectrum without resulting in a higher dark-count rate or degraded photon-number resolution.
Physical Review A (Atomic, Molecular and Optical Physics)


Bell''''s inequality, linear optics quantum computing, photon detector, quantum efficiency, TES, transition-edge sensor


Rosenberg, D. , Lita, A. , Miller, A. and Nam, S. (2005), Noise-free high-efficiency photon-number-resolving detectors, Physical Review A (Atomic, Molecular and Optical Physics), [online], (Accessed April 21, 2024)
Created June 16, 2005, Updated October 12, 2021