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Explore the fascinating world of spasers, beginning with their definition and distinctive features that revolutionize optics. Delve into their structure, focusing on the metal nanoparticle cavity and the integration of gain mediums. Understand the working principles with a spotlight on plasmonic oscillations, and compare them to traditional lasers. Analyze key performance factors like efficiency and challenges such as metal losses. Discover spasers' groundbreaking applications in fields like...