Absolute spectral gaps for infrared light and hypersound in three-dimensional metallodielectric phoxonic crystals

By means of full electrodynamic and elastodynamic multiple-scattering calculations we study the optical and acoustic properties of three-dimensional lattices of metallic nanospheres implanted in a dielectric host. Our results show that such structures exhibit omnidirectional spectral gaps for both telecom infrared light and hypersound, with relatively low absorptive losses. This class of dual phoxonic band-gap materials is an essential step toward the hypersonic modulation of light and could lead to the development of efficient acousto-optical devices

Классификационный анализ акустооптических устройств управления лазерным пучком

С позиций прикладной оптоэлектроники проведена классификация устройств управления лазерным пучком, одной из разновидностей которых являются акустооптические, используемые в системах оптической записи информации, обработки радио- и оптических сигналов. Показано, что базовым элементом акустооптических устройств управления амплитудой, фазой, частотой и направлением лазерного пучка является акустооптическая ячейка. Предложены определения акустооптических модулятора, линии задержки, затвора, дефлектора, сканера, фильтра.In the content of applied optoelectronics the classification of devices of control by laser beam has been carried out, one from varieties of which are acousto-optical devices used in systems of optical recording information, radio and optical signals processing. It was shown that acousto-optical cell is base element of acousto-optical devices of control of amplitude, phase, frequency and direction of laser beam. Determinations of acousto-optical modulators, delay line, gate, deflector, scaner, filter have been proposed

Acousto-optical multiple interference devices

We present a new concept for waveguide acousto-optical devices based on coupled MachZehnder interferometers driven by acoustic waves. These acousto-optical multiple interference devices use the periodic refractive index modulation induced by the acoustic wave to realize functionalities such as ON/OFF switching for an arbitrary time interval, as well as for efficient light modulation at high harmonics of the acoustic frequency and pulse shaping for, e.g., integrated Q-switches. We also discuss application of the concepts to light modulation by very high acoustic frequencies, where the acoustic wavelengths become much shorter than the optical ones