Characterization of the reversible photoinduced optical changes in Sb-based glasses

Refractive index changes in photochromic SbPO4–WO3 glass by exposure to band-gap radiation

“…The changes in the absorption coefficient follow a single Gaussian profile over an exceptionally wide bandwidth (500 nm-1600 nm), with a 1/e width of 647.5 nm. The peak of the absorption coefficient change lies at a wavelength of ∼ 850 nm as opposed to two peaks obtained for irradiation with the Ar-ion laser [8] which indicates that a single defect accounts for the absorption changes in the present case. The change in absorption coefficient of glass is due to this Gaussian peak and not by a shift in absorption band edge [8].…”

“…The sample was kept at room temperature and the transmission measurements were repeated, showing the same results even after 48 h proving that the photosensitive effects are quite stable at room temperature. After the irradiation a change in the glass color was noted throughout the volume, from yellow to dark gray, which was also noted with the Argon ion laser irradiation [8]. The absorption coefficient is obtained from the % transmittance (%T) using the equation:…”

“…Irradiation of Sb 2 O 3 -SbPO 4 glasses by 350 nm Ar-laser shows a rapidly reversible photo-darkening [6]. Glasses in (100− x)SbPO 4 -(x)WO 3 (20 ≤ x ≤ 60, x in mol%) binary system have been reported by M. Nalin et al [8]. Their study using different spectroscopic techniques suggested the presence of two distinct glass networks.…”

“…These glasses have high refractive index, good thermal stability and exhibit structural and spectral changes in their optical properties under the influence of electromagnetic radiation. The photoinduced changes in the absorption coefficient and color change of SbPO 4 -WO 3 glass were studied by exposure to Ar-ion laser for different wavelengths (458 nm, 488 nm and 514 nm) at the absorption edge [8]. The conformational changes in such glasses become even more important if the absorption remains low, especially for applications in guided wave devices in the infrared region of the spectrum where oxide glasses are not suitable due to their high absorption.…”

Two-dimensional photonic crystals in antimony-based films fabricated by holography

“…͓DOI: 10.1063/1.2921603͔ Antimony contained glassy materials are promising for several photonic applications. Recently, interesting studies concerning the nonlinearity, 1-3 the optical, 4 and the photochromic 5 properties of this compound were reported in both glasses and films. Some of the interesting properties presented by these glasses are high refractive index ͑Ϸ2͒, large nonlinear refractive index, n 2 large Kerr effect, low two photon absorption coefficients, large infrared transmittance, and high thermal stability.…”