Combined nonlinear-optical electric and magnetic field response in a cadmium manganese telluride crystal

Abstract

Utilizing experimental results, which demonstrate the presence of both Faraday rotation and electric-field-induced linear birefringence in a diluted-magnetic-semiconductor crystal of cadmium manganese telluride (CMT), a single probe that is capable of sensing both electric and magnetic fields independently has been developed. A higher field sensitivity and greater accuracy are observed for the CMT crystal when compared to a lithium tantalate electro-optic crystal and terbium gallium garnet magneto-optic crystal. The linear electro-optic coefficient r41 for CMT has been calculated from electric-field measurements to be 3.5±0.2pm∕V.

Femtosecond electro-optic effect in (Cd,Mn)Te single crystals

“…Plugging the above parameters into (1) and (3) and knowing that for Cd 0.88 Mn 0.12 Te n o = 2.94 for = 800 nm [9], we calculated the low-f r 41 to be 2.8±0.8 pm/V. The obtained value is in close approximation to the CdTe r 41 value of 4.5 pm/V presented by Yariv [4] and the Cd 0.75 Mn 0.25 Te value (r 41 = 3.5±0.2 pm/V) calculated in [5], but is much too small to account for the very large signal presented in figure 1. Therefore, we need to use the data obtained directly from our ultrafast EO experiment (figure 1) as the calculation starting point.…”

“…We present here EO experiments demonstrating that our Cd 0.88 Mn 0.12 Te (CMT) single crystal is an excellent substitute for the commonly used LiTaO 3 , and showing that the CMT EO-coefficient r 41 at THz frequencies (THz-f) is much greater than the low-frequency (low-f) values reported by Yariv [4] and Chen [5].…”

Fiber Optic Sensors Based on the Faraday Effect

“…The Pockels effect will induce birefringence in crystals that do not possess central symmetry [ 41 ], and this will create measurement error in the presence of an electric field. On the other hand, a polarization state is determined by both circular and linear birefringence, and there are propositions for the measurement of both simultaneously [ 42 , 43 , 44 ]. After the linear birefringence is calculated, it can be used for temperature compensation if temperature shift is the cause, or for electric field calculation if an electric field is the cause, but not both.…”

Photoconductive and electro-optic effects in (Cd,Mg)Te single crystals measured in an experiment-on-chip configuration

“…(Cd,Zn)Te is one of the main materials used as an x-ray and gamma-ray detector and is commercially available [6,7], while (Cd,Mn)Te is among the best-known diluted magnetic semiconductors [8,1]. In addition, (Cd,Mn)Te has been known for its interesting properties, both magneto-and electro-optic [9,10], and recently has been successfully implemented in time-resolved x-ray detectors [11].…”