Photorefractivity at 1.5 μm in CdTe:V

Abstract

We have for the first time demonstrated two-beam coupling energy transfer at a wavelength of 1.5 μm. Beam coupling gain coefficients of 0.6 cm−1 have been obtained in vanadium -doped CdTe with only 5 mW/cm2 incident intensity. These gain coefficients exceed typical gain coefficients in GaAs at 1.06 μm wavelength by 50%. In preliminary measurements using the moving grating technique, we have measured a gain coefficient of 2.4 cm−1. Through adjustment of the doping level, CdTe:V can be used as a sensitive photorefractive material through the 0.9–1.5 μm spectral range.

Wavelength dependent effective trap density in CdTe: evidence for the presence of two photorefractive species

“…These adjustments are conducted with the same value of r 41 =5.5 pm.V -1 [9,10] for the two wavelengths and a refractive index n 0 =2.82 at 1.06µm and n 0 = 2.74 at 1.55µm [11]. Due to the fact that the counterpropagating point brings us an higher precision in the determination of the effective trap density we can note on these results that the effective trap density varies with the wavelength.…”

Crystal growth technology of binary and ternary II–VI semiconductors for photonic applications

“…Using these procedures we have successfully grown undoped and transition metal-doped binary and ternary II-VI crystals including semi-magnetic crystals of both IIa-VI and IIb-VI compounds. We have used these crystals to demonstrate novel applications [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][32][33][34] of which we have discussed two applications in which we used these II-VI crystals for mid-IR solid-state lasing and remote laser vibrometry.…”

“…At Brimrose Corporation, we have produced bulk crystals of a variety of IIa-VI and IIb-VI binary and ternary bulk crystals and demonstrated their applications along with various collaborators [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. In this paper, we discuss two of the recent and novel applications of CdTe and CdMnTe crystals for: (i) room temperature operating tunable mid-IR lasers and (ii) remote laser vibrometers for monitoring vital signs.…”

Semi‐insulating (Cd,Mn)Te:V crystals: Electrical contacts

“…[14][15][16]) when the material, suitable for optoelectronic application of the photorefractive effect in the wavelength region 0.9 ÷ 1.55 µm, was looked for.…”