Control of light speed: From slow light to superluminal light
نویسندگان
چکیده
منابع مشابه
Slow to superluminal light waves in thin 3D photonic crystals.
Phase measurements on self-assembled three-dimensional photonic crystals show that the group velocity of light can flip from small positive (slow) to negative (superluminal) values in samples of a few mum size. This phenomenon takes place in a narrow spectral range around the second-order stop band and follows from coupling to weakly dispersive photonic bands associated with multiple Bragg diff...
متن کاملSuperluminal and slow light propagation in a room-temperature solid.
We have observed both superluminal and ultraslow light propagation in an alexandrite crystal at room temperature. Group velocities as slow as 91 meters per second to as fast as -800 meters per second were measured and attributed to the influence of coherent population oscillations involving chromium ions in either mirror or inversion sites within the crystal lattice. Namely, ions in mirror site...
متن کاملSlow and superluminal light in semiconductor optical amplifiers
Introduction: Optical buffer via optically controlled slow light propagation is highly desirable for numerous applications, including all-optical true time delay, signal processing and storage. The device is based on optically controlled dispersion, which leads to the possibility to control the group velocity. An all-optical buffer based on electromagnetically-induced transparency in quantum do...
متن کاملOptogenetics: Control of Brain Using Light
Neuronal cells communicate with each other by producing electrical signals or action potentials (APs). Different ion channels, including Na+, K+ and Ca2+ channels, are involved in generation of AP. Once an AP is generated in the soma, it travels down entire the axon length toward its terminal in a self-generating fashion that ultimately conveys information between neurons in the neural circuit....
متن کاملLight-speed Optical Control With
This paper presents the design, fabrication and measurement results of a nano-photonic bandgap crystal (PhC) integrated circuit device. The PhC comprises of orthogonally intersecting single line defect Bragg reflection waveguides, partially reflecting PhC mirrors and a small volume optical resonator. A PhC bandgap optical intersection with size of ~ 5 × 5 um, waveguide width of 800 nm, and oper...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2008
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.78.013804