Erbium's atomic number is 68 and symbol is Er. It's widely used in below areas based on it's properties:

Erbium's Role in Metamaterials Technology: Involved in developing advanced materials with unusual electromagnetic properties for applications like superlenses and cloaking devices;

Erbium-Doped Fiber Amplifiers (EDFA) Application: Used in optical fiber communications to amplify the light signals without the need for conversion to electrical signals. It utilizes erbium's ability to amplify light at specific wavelengths;

Erbium-lron Garnet: A type of synthetic garnet used in various optical devices due to its magnetic and optical properties, particularly in isolators and circulators fields;

Erbium-Titanium Oxides Area: These materials are researched for their potential use in energy storage and conversion applications due to their unique structural and electronic properties;

Erbium-Doped Glass Production: Used in the creation of lenses, exploiting its superior light-transmitting qualities and ability to produce specific wavelengths;

Erbium as a Colorant in Glass Production: Erbium is used to add a pink color to glass and ceramics, contributing to aesthetic applications and providing UV-blocking capabilities;

Erbium in Phosphors Field: Utilized in display and lighting technologies, creating vivid colors in devices such as LED televisions and energy-efficient lighting;

Erbium in Quantum Computing: Research is exploring erbium ions for their potential in quantum memory due to their long coherence times and efficient interaction with light at telecommunication wavelengths.