Conventional and scanning near-field optical microscopy techniques are cross referenced to femtosecond nonlinear-optical measurements and finite-element numerical simulations to visualize and analyze a strong confinement of electromagnetic radiation in guided modes of a photonic-crystal fiber with only a few air holes surrounding the fiber core. A nonlinear coefficient of about 120 W-1 km-1 is achieved at the wavelength of 670 nm for a fused-silica fiber with a full hexagonal cycle of closely packed air holes around the fiber core. The removal of a single element from this array of air holes is shown to frustrate field confinement in guided modes, leading to mode leakage. © Springer-Verlag 2005.
Electromagnetic field confined and tailored with a few air holes in a photonic-crystal fiber / A. M., A., J. M., M., J. A., L., M., F., F., P., A., C., S., S., M., L., M., W., N., G., K. V., D., A. V., K., V. S., S., Y., K., Sibilia, C., E. E., S., A. M., Z.. - In: APPLIED PHYSICS. B, LASERS AND OPTICS. - ISSN 0946-2171. - 81:2-3(2005), pp. 409-414. [10.1007/s00340-005-1855-9]
Electromagnetic field confined and tailored with a few air holes in a photonic-crystal fiber
SIBILIA, Concetta;
2005
Abstract
Conventional and scanning near-field optical microscopy techniques are cross referenced to femtosecond nonlinear-optical measurements and finite-element numerical simulations to visualize and analyze a strong confinement of electromagnetic radiation in guided modes of a photonic-crystal fiber with only a few air holes surrounding the fiber core. A nonlinear coefficient of about 120 W-1 km-1 is achieved at the wavelength of 670 nm for a fused-silica fiber with a full hexagonal cycle of closely packed air holes around the fiber core. The removal of a single element from this array of air holes is shown to frustrate field confinement in guided modes, leading to mode leakage. © Springer-Verlag 2005.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
