High-reflectivity broadband distributed Bragg reflector lattice matched to ZnTe

Abstract

We report on the realization of a high quality distributed Bragg reflector with both high and low refractive index layers lattice matched to ZnTe. Our structure is grown by molecular beam epitaxy and is based on binary compounds only. The high refractive index layer is made of ZnTe, while the low index material is made of a short period triple superlattice containing MgSe, MgTe, and ZnTe. The high refractive index step of ∆n = 0.5 in the structure results in a broad stopband and the reflectivity coefficient exceeding 99% for only 15 Bragg pairs.

Spin-Related Spectroscopy of CdTe-Based Quantum Dots

“…New possibilities in this respect may base on placing the QDs in photonic structures. Such possibilities have been opened by recent development of distributed Bragg reflectors, lattice--matched to ZnTe barriers [19].…”

MBE grown microcavities based on selenium and tellurium compounds

“…The refractive index contrast determined from the fit is ∆n ≈ 0.45, allowing to reach a higher reflectivity (close to 95%) despite the proximity of the absorption edge at about 530 nm. Before this work, ZnTe based DBRs [17] were tested only for the redorange spectral range (590 nm < λ 0 < 660 nm), here we show the possibility to obtain the cavity mode for wavelength as short as λ 0 ≈ 565 nm (see Fig. 5 b).…”

“…In the case of structures based on mixed selenium and tellurium compounds ( Fig. 1-c), the DBRs consist of ZnTe and a short period ZnTe|MgSe|ZnTe|MgTe superlattice resulting in a four compound digital alloy [17]; CdTe QDs are embedded in the ZnTe cavity.…”

Optical Study of ZnTe-Based 2D and 0D Photonic Structures Containing CdTe/ZnTe Quantum Dots

“…Distributed Bragg reflectors (DBRs) were grown by the molecular beam epitaxy (MBE), using a new low refractive index composite material -a short-period superlattice based on ZnTe, MgTe, and MgSe binary compounds [1]. A high refractive index contrast ∆n = 0.5 was thus achieved, resulting in a wide (60 nm) stop band with high (> 0.99) reflectivity.…”