Room temperature slow light in a quantum-well waveguide via coherent population oscillation
نویسندگان
چکیده
منابع مشابه
Room temperature slow light in a quantum-well waveguide via coherent population oscillation.
We report room temperature demonstration of slow light propagation via coherent population oscillation (CPO) in a GaAs quantum well waveguide. Measurements of the group delay of an amplitude modulated signal resonant with the heavy-hole exciton transition reveal delays as long as 830 ps. The measured bandwidth, which approaches 100 MHz, is related to the lifetime of the photoexcited electron-ho...
متن کاملSlow-Light in Nonuniform Quantum Dot Waveguide
We analyzed a new variable all-optical buffer using semiconductor quantum dots (QD). We show that an Ids-InGaAs-GaAs QD waveguide with 20meV inhomogeneous linewidth can achieve substantial buffering with a novel unbalanced multi-wavelength pumping scheme. Introduction: The advancement of 111-V semiconductor quantum dots (QD) has made many interesting applications, such as ultra-low threshold di...
متن کاملSlow light using excitonic population oscillation
We develop a theoretical model for slow light using excitonic population oscillation in a semiconductor quantum well. In a two-level system, if the resonant pump and the signal have a difference frequency within the range of inverse of the carrier lifetime, coherent population beating at this frequency will be generated. We analyze the excitonic population oscillation using an atomiclike model ...
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 کاملCoherent Control of Quantum Entropy via Quantum Interference in a Four-Level Atomic System
The time evaluation of quantum entropy in a four-level double- type atomic system is theoretically investigated. Quantum entanglement of the atom and its spontaneous emission fields is then discussed via quantum entropy. It is found that the degree of entanglement can be increased by the quantum interference induced by spontaneous emission. The phase dependence of the atom-field entanglement is...
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: Optics Express
سال: 2005
ISSN: 1094-4087
DOI: 10.1364/opex.13.009909