Noam Gross

Lasers pumped quantum dynamics in nanostructured arrays for computing

Quantum computation uses qubit in superposition and entanglement states providing more sophisticated computation ability regarding today’s computers. For that purpose of developing a novel computer concept exploiting quantum dynamics at the nanoscale, we joined an EC H2020 program consortium named COPAC [1]. We propose to analyze the nonlinear 2 dimensional optical response of assembled nanostructures in solid arrays to a sequence of short laser pulses. Based on 2D maps of the stimulated emission we implement a novel paradigm for parallel information processing. Within the COPAC project, we, in KiloLambda, will develop the device nanostructure and engineering design.

Up converting as a tool for laser protecting smart filters

Optical systems are susceptible to saturation or damage caused by high power lasers. The major issue is to find a mechanism to protect from laser threats without interfering with the optical system performances. This paper presents a new approach in exploiting the laser energy itself to enable a dynamic response of a protection filter. We discuss an up conversion mechanism in which two or more photons of the threatening laser are absorbed by an up converting molecule following an energy transfer to a molecule that is able to change its absorption spectra and absorb in that laser wavelength range, thus creating a dynamic filter limiting high power lasers while allowing high transmittance for low intensity light.

New counter-countermeasure techniques for laser anti-dazzling spectacles

Aviation, commercial and military, is new area in optics that is suffering from laser threats in the last years. Dazzling and damage to pilots eyes by laser pointers is a common threat lately. Under certain conditions, laser light, directed at aircraft can be hazardous. The most likely scenario is when bright visible laser light causes distraction and/or temporary flash blindness to the pilot, during a critical phase of flight like landing or takeoff. It is also possible, that a visible or invisible beam could cause permanent damage to a pilots eyes. This paper presents a novel technology for protection of the human eye against laser threats in the visible range.

Keeping display visibility in outdoor environment

Augmented reality (AR) is a live direct or indirect view of a physical, real-world environment whose elements augmented (or supplemented) by computer-generated sensory input such as sound, video, graphics or GPS data. As a result, the technology functions by enhancing one’s current perception of reality. Artificial information about the environment and its objects can be overlaid on the real world, using a special optics and display. When using such a device at a very bright day, the display image risks vanishing due to the sun illumination. However, at a very cloudy day, one needs all the light to pass through the display to the user eye. The need to control the amount of sunlight passes through the AR device in a passive way was the trigger for our effort in developing Dynamic Sunlight Filter (DSF™). DSF™ is a passive solution which is dedicated to regulate sunlight overpower events.

Smart filters: operational HMD even at bright sunlight conditions

A typical Head Mounted Display (HMD) has either one or two small displays with relevant optics embedded in a helmet, eye-glasses (also known as data glasses) or visor. See-through HMDs provide the ability of superimposed the generated image on a real-world view. When using a see-through HMD at a very bright day, the display image risks vanishing due to the sun illumination. However, at a very cloudy day, one needs all the light to pass through the display to the user eye. The need to control the amount of sunlight passes through the HMD in a passive way was the trigger for our effort in developing Dynamic Sunlight Filter (DSF™). DSF™ is a passive solution which is dedicated to regulate sunlight overpower events.

Dynamic sunlight filter (DSF) for HMD: controlling background illumination in a passive way

In see-through HMD the background illumination is a crucial factor, which influences the ability of viewing the display. When using the HMD at a very bright day, the display image risks vanishing due to sun illumination. However, at a very cloudy day, one needs all the light to pass through the display to the user’s eye. The need for a better light control was our trigger for developing a Dynamic Sunlight Filter (DSF), which is a passive solution dedicated to regulate sunlight overpower events.