Room-temperature Holographic Spectral Hole-burning: Implementation Path and Research Prospect

： Spectral hole - burning holographic storage has the characteristics of high - density ， anti - interference and low - energy - consumption ， and has potential ability of storing massive “ cold data ” . Based on our own research experi‐ ence ， we briefly review the development process and existing bottlenecks of spectral hole - burning. We propose a new idea to achieve room - temperature holographic spectral hole - burning in a functional unit of transition - metal - oxide/no‐ ble - metal ， which is based on the principle of plasmatic spectral hole - burning. Then we present the latest achieve‐ ments in large - area holographic discs and compact - type holographic memory devices. We also have a prospect for fu‐ ture work on high - density holographic spectral hole - burning in frequency domain via orderly arrangement of function‐ al units. A series of work of the author􀆳s group open up a new direction for high - density optical storage ， and provide a useful idea for the development of transition - metal - oxide - based optoelectronic devices with high - integration.