Month: September 2022

HYPERBOLIC METAMATERIALS "research has captured the imagination of optical engineers and materials scientists because of their varied applications including imaging, cloaking, sensing, waveguiding, and simulating space-time phenomena." https://lnkd.in/ePrzn3K View in LinkedIn

WAVE-GUIDING. "Hyperbolic metamaterials are a multi-functional platform to realize waveguiding, imaging, sensing, quantum and thermal engineering beyond conventional devices. This metamaterial uses the concept of engineering the basic dispersion relation of waves to provide unique electromagnetic modes that can have a broad range of applications." https://lnkd.in/ePrzn3K View in LinkedIn

"LASERS are the heart of modern communication technology. As the industry strives continuously to improve the speed, efficiency and compactness of communication equipment, it is constantly on the look-out for new materials, techniques and methods that help the cause. Photonic crystal lasers have caught the attention of scientists and engineers for that very reason." https://lnkd.in/e3AXuz6 View in LinkedIn

"PHOTONIC CRYSTALS make use of the fundamental properties of waves, such as scattering and interference, to create “band gaps” – ranges of wavelength or frequency within which waves cannot propagate through the structure." https://lnkd.in/ehwDYhR View in LinkedIn

SPECIAL PROPERTIES. "This phenomenon is well known in physics: the electrons in a semiconductor can only occupy certain energy bands, while photonic crystals only allow light in certain frequency ranges to travel through them." https://lnkd.in/ehwDYhR View in LinkedIn

"THE BAND GAP in a photonic crystal is caused by a periodic variation in the refractive index of an artificially structured material." But remember that these structures have arisen many times independently in nature. https://lnkd.in/ehwDYhR View in LinkedIn

A PHOTONIC HYPER-CRYSTAL "which combines the most interesting features of hyperbolic metamaterials and photonic crystals. Similar to hyperbolic metamaterials, photonic hyper-crystals exhibit broadband divergence in their photonic density of states due to the lack of usual diffraction limit on the photon wave vector." https://lnkd.in/euPD3KU View in LinkedIn

FUTURE DIRECTIONS. "The major applications of hyperbolic media: subwavelength imaging and photonic density of states engineering. The major future work in this area will be about engineering the coherent, thermal and quantum state of light. Another major direction will be the fluctuational and macroscopic quantum electrodynamics of metamaterials." https://lnkd.in/ePrzn3K View in LinkedIn

PHOTONIC CRYSTALS. "The field of phononic crystals is only about 10 years old and many important questions are just being raised. Phononic crystals will provide researchers in acoustics and ultrasonics with new components that offer the same level of control over sound that mirrors and lenses provide over light." https://lnkd.in/ehwDYhR View in LinkedIn

"IN A PHONIC CRYSTAL the density and/or elastic constants of the structure change periodically. This changes the speed of sound in the crystal, which, in turn, leads to the formation of a phononic band gap." Analogy of sound and light waves. https://lnkd.in/ehwDYhR View in LinkedIn