Quantification of nonlinear absorption in ternary As-Sb-Se chalcogenide glasses

Abstract

In this article, we studied intensity dependent third order nonlinear optical response in ternary As40Sb7Se53 and As40Sb10Se50 chalcogenide glasses by employing nanosecond Z-scan technique. At low intensity, we observed saturable absorption in As40Sb7Se53 which makes a remarkable transition to reverse saturable absorption at higher intensities. On the other hand, when the Sb concentration increased in As40Sb10Se50, saturable absorption disappears and the sample exhibits only two-photon absorption. Experimental results further indicate that the strong two-photon absorption in our samples can be exploited to fabricate high performance solid state optical limiting devices for next generation all-optical network.

In situlaser irradiation: the kinetics of the changes in the nonlinear/linear optical parameters of As50Se40Sb10thin films for photonic applications

“…24 Pradhan et al have studied the in situ kinetics of the linear optical changes in As 40 Se 53 Sb 07 films 5 and the ex situ 3 rd order nonlinearity change. 25 Though ex situ linear and nonlinear optical properties have been studied to some extent, 26,27 the in situ nonlinear/linear dynamic response of the As–Se–Sb materials upon laser irradiation is very rare. We have employed the in situ pump-probe method to observe and correlate the linear and non-linear optical constants with laser irradiation time which brings out the detailed kinetics of such changes for various optical applications.…”

Glass forming region and optical properties of chalcogenide glasses within a gallium-tin-selenium ternary system

“…In the past few decades, ChGs based on germanium (Ge)-chalcogen and arsenic (As)-chalcogen systems have been intensively studied for their excellent glass forming ability, wide IR transparent windows and high thermal stability [6][7][8][9][10][11].…”

Pulse-duration dependence of saturable and reverse saturable absorption in ZnCo2O4 microflowers

“…Apart from the conventional materials, e.g. chalcogenide glasses (ChGs) [4][5][6] and ZnO [7,8], several exotic new materials including transition metal dichalcogenides (TMDCs), for example, MoSe2, WS2, black phosphorus, few-layer MXenes [9][10][11][12] have been exploited widely for the development of next generation nano-electronic devices based on SA as well as its counterpart process, reverse saturable absorption (RSA). Interestingly, 2D structures can further be aggregated physico-chemically to form a stable morphology of 3D materials.…”

“…where T0, Tmax, N, and L are the transmission in the linear regime, the high intensity saturated transmission, ground state carrier density and thickness of the ZCO microflower. To exploit the ISC lifetime, first we performed the Z-scan measurements (details in [5,6]) with 560 nm femtosecond laser where the pulse-width of the laser τfs ~120 fs is shorter than the ISC process (τISC ~ 5 ps). The Z-scan theory is employed to quantify SA and ESA by following propagation equation in the dispersion as a function of the position given by:…”

“…Observation of SA at lower intensity and crossover to ESA at higher intensity highly advantageous for the fabrication of nanophotonic devices. For example, SA is exploited for passive mode locking [3] whereas ESA finds application in optical limiting [6]. In Fig.…”