Resonant Optical Absorption and Photothermal Process in High Refractive Index Germanium Nanoparticles

Intrinsic Optical Absorption in Germanium

Zusammenfassend kann gesagt werden, daß das Verhalten bei hohen Ladungsträgerdichten in beiden Arten der Untersuchungen auf den gleichen Grund zurückzuführen ist. Neben den Abhängigkeiten der effektiven Massen und der g-Faktoren von der Bänderform in der L A N D A U — P E I E R L S und PAULI-Suszeptibilität der Elektronen treten zusätzliche Interbandterme. die proport ional zur Ladungsträgerdichte

Resonant Negative Refractive Index Metamaterials

Polarization-dependent optical absorption of MoS2 for refractive index sensing

As a noncentrosymmetric crystal with spin-polarized band structure, MoS2 nanomaterials have attracts increasing attention in many areas such as lithium ion batteries, flexible electronic devices, photoluminescence and valleytronics. The investigation of MoS2 is mainly focused on the electronics and spintronics instead of optics, which restrict its applications as key elements of photonics. In t...

Interferometric measurement of the resonant absorption and refractive index in rubidium gas

We present a laboratory demonstration of the Kramers-Kronig relation between the resonant absorption and refractive index in rubidium gas. Our experiment uses a rubidium vapor cell in one arm of a simple Mach-Zehnder interferometer. As the laser frequency is scanned over an atomic resonance, the interferometer output is affected by variations of both the absorption and refractive index of the g...

All-optical on-chip sensor for high refractive index sensing

A highly sensitive sensor design based on two-dimensional photonic crystal cavity is demonstrated. The geometric structure of the cavity is modified to gain a high quality factor, which enables a sensitive refractive index sensing. A group of slots with optimized parameters is created in the cavity. The existence of the slots enhances the light–matter interactions between confined photons and a...