There's more to light than meets the eye.

David John Miller

Yundong Zhang, Kai Ma, Yongfeng Wu +3 more

We investigate the phase and group delay in eye-like ring resonator with the effect of different coupling coefficients and attenuation factors. The eye-like structure is composed of two bus waveguides coupling with the outer ring and the two rings coupling together which have the same perimeters. The eye-like ring resonator has two outputs which have different transmission characteristics. In this paper, we measure the group delay of the two outputs through changing the coupling coefficients and the attenuation factors of the inner and the outer ring. The result shows that the two outputs have reverse group delay (superluminal and slow light) which will have potential use in slow light fiber, optical buffers and optical switches.

Harold T. Davis

Amaury Dodel, A. Mayinda, Enky Oudot +4 more

We give a complete proposal showing how to detect the non-classical nature of photonic states with naked eyes as detectors. The enabling technology is a sub-Poissonian photonic state that is obtained from single photons, displacement operations in phase space and basic non-photon-number-resolving detectors. We present a detailed statistical analysis of our proposal including imperfect photon creation and detection and a realistic model of the human eye. We conclude that a few tens of hours are sufficient to certify non-classical light with the human eye with a p-value of 10%.

N. Vivian Pope

e see objects when the light they reflect reaches our eyes and starts a cascade of complex chemical processes.To trigger these processes, we have two main types of receptor in our eye that help us to see -cones and rods.Rods are very sensitive to light levels but cannot process any information on colours, whereas cones have different responses to different wavelengths of light and are what allow us to see in colour.