Abstract:
I will introduce recent theoretic progress in quantum information theory and quantum computation. In particular, I will focus on some interesting development of quantum machine learning algorithms.
Abstract:
Recently, a research highlight is hyperbolic metamaterials (HMMs), defined by the iso-frequency curve in momentum-space owing to its unique hyperbolic shape. To achieve this artificial structure with promising functionality that provides the increased photonic density of states (PDOS) from the unbounded wave-vector. HMMs can enhance the transition rate of the optical gain media to achieve the lasing action and reduce the threshold, which is very useful to be a suitable candidate for all-optical communication. Furthermore, we also report the demonstration of white random laser action using upconversion nanoparticles (UCNP) deposited on top of HMMs. These combination is capable of producing white random laser from a single segment. The porous structure of the UCNP clusters functions as the microcavity for photon scattering that provides the optical feedback gain for the emitted light. With a suitable design of HMMs superlattice, it is possible to tune the high PDOS that enables to induce emission enhancement at the region of interest to produce a broadband lasing action device that covers the red, green, and blue.