In this paper we report on our recent progress on the next generation photonic storage. The incorporation of the super-resolution and nanophotonic techniques enables the photonic storage with an ultra-high capacity approaching 1 Petabytes/disc, a two-order of magnitude enhanced information security and an ultra-long lifetime.
Efficient and low-noise distribution of photons is essential for quantum technology networks. Current strategies focus on low-loss distribution channels or the use of quantum repeaters. I will present a surprising alternate strategy: transporting photons stored in a quantum hard drive. Recent results demonstrate the potential for such a device in rare-earth ion crystals with coherence lifetimes greater than 6 hours. With a sufficiently high photonic storage capacity, quantum hard drives will enable new regimes of science, such as optical astronomy below 1 µas resolution using very long baseline interferometry.
The explosive growth of information worldwide emerges as a great challenge for the currently-available big data center platform and compels the development of novel methods and storage devices. Far-field super-resolution techniques have shown the potential to achieve nanoscale three-dimensional optical data storage resulting in a single-disc capacity towards petabytes. In particular, super-resolution photoinduction-inhibited nanolithography (SPIN) has been used to write features with size of 9 nm, while stimulated emission depletion (STED) microscopy is suitable for super-resolution optical data reading. However, the combination of SPIN and STED microscopy for super-resolution optical data storage is presently limited by the high intensity required for the inhibition beam, which results in high energy consumption and damage of the data bits, and the lack of an optically-activatable material for data read-out after SPIN. Recently, rare-earth doped nanocrystals, featuring long luminescence lifetime and emission bands ranging from ultraviolet to near-infrared, have been proven adapt for low-power super-resolution optical data reading through STED microscopy and may be implemented for super-resolution data writing fully based on optical methods. Here, we report about the development of rare-earth doped nanocrystals for ultra-low power, ultra-high capacity super-resolution optical data storage. Core-shell nanoparticles were prepared via co-precipitation and measurements of emission intensity and fluorescence lifetime have been performed. Subsequently, rare-earth doped nanocrystals have been used for optical data storage under 980-nm laser excitation and the data bits were successfully retrieved back by STED microscopy. Finally, simulation results indicate the feasibility of nano-sized recordings and thus a boost of storage capacity is expected.
The capability of controlling light at scales that are much smaller than the operating wave-length enables new optical functionalities, and opens up a wide range of applications. Such a capability is out of the realm of conventional optical approaches. This dissertation aims to explore the light-matter interactions at nanometer scale, and to investigate the novel scien-tific and industrial applications. In particular, we will explain how to detect nanoparticles using an ultra-sensitive nano-sensor; we will also describe a photonic diode which gener-ates a unidirectional flow of single photons; Moreover, in an one-dimensional waveguide QED system where the fermionic degree of freedom is present, we will show that strong photon-photon interactions can be generated through scattering means, leading to photonic bunching and anti-bunching with various applications. Finally, we will introduce a mecha-nism to achieve super-resolution to discern fine features that are orders of magnitude smaller than the illuminating wavelength. These research projects incorporate recent advances in quantum nanophotonics, nanotechnologies, imaging reconstruction techniques, and rigorous numerical simulations.
High Resolution Image Download MS PowerPoint Slide In recent years, remarkable advances in photonic computing have highlighted the need for photonic memory, particularly high-speed and coherent random-access memory. Addressing the ongoing challenge of implementing photonic memories is required to fully harness the potential of photonic computing. A photonic-phononic memory based on stimulated Brillouin scattering is a possible solution, as it coherently transfers optical information into sound waves at high-speed. Such an optoacoustic memory has shown great potential as it fulfills key requirements for high-performance optical random-access memory due to its coherence, on-chip compatibility, frequency selectivity, and high bandwidth. However, the storage time has so far been limited to a few nanoseconds due to the nanosecond decay of the acoustic wave. In this work, we experimentally enhance the intrinsic storage time of an optoacoustic memory by more than 1 order of magnitude and coherently retrieve optical information after a storage time of 123 ns. This is achieved by employing the optoacoustic memory in a highly nonlinear fiber at 4.2 K, increasing the intrinsic phonon lifetime by a factor of 6. We demonstrate the capability of our scheme by measuring the initial and readout optical data pulses with a direct and double homodyne detection scheme. Finally, we analyze the dynamics of the optoacoustic memory at different cryogenic temperatures in the range of 4.2–20 K and compare the findings to continuous wave measurements. The extended storage time is beneficial not only for photonic computing but also for Brillouin applications that require long phonon lifetimes, such as optoacoustic filters, true-time delay networks, and synthesizers in microwave photonics.