Time‐resolved optically‐detected magnetic resonance of II–VI diluted‐magnetic‐semiconductor heterostructures

Abstract

Time-resolved optically-detected magnetic resonance (ODMR) technique was used to study spin dynamics of Mn 2+ ions in (Zn,Mn)Se-and (Cd,Mn)Te-based diluted magnetic semiconductor quantum wells. Times of spin -lattice relaxation have been measured directly from a dynamical shift of exciton luminescence lines after a pulsed impact of 60 GHz microwave radiation.

Magneto-Optics of Excitons Interacting with Magnetic Ions in CdSe/CdMnS Colloidal Nanoplatelets

“…These changes can be detected optically via the excitons or trions interacting with the Mn 2+ spins, see Figure d. The application of the ODMR technique to quantum well structures based on (Zn,Mn)­Se DMSs is discussed in refs , , and . There it was shown that the resonant heating of the Mn 2+ spin system can be detected by several effects: (i) the decrease of the exciton giant Zeeman splitting, resulting in a spectral shift of the exciton emission line, (ii) the decrease of the circular polarization degree induced by the magnetic field, and (iii) the redistribution of the emission intensity between the exciton line and the Mn 2+ emission band.…”

“…The ODMR technique used in this study was described in detail in ref . The ODMR spectrometer consisted of a 60 GHz all-solid-state microwave oscillator (photon energy of 0.248 meV) with a tuning range from 59.05 to 60.55 GHz and an output power of up to 100 mW.…”

Magneto-optics of excitons interacting with magnetic ions in CdSe/CdMnS colloidal nanoplatelets

“…The ODMR technique used in this study was described in detail in Ref. 48. The ODMR spectrometer consisted of a 60 GHz all-solid-state microwave oscillator (photon energy of 0.248 meV) with a tuning range from 59.05 to 60.55 GHz and an output power of up to 100 mW.…”

Coherent Raman spectroscopy of the quantum-entangled exciton-Mn2+state in CdTe

“…7 and it has recently been exploited to develop a form of ODMR technique. 14,15,17,18 Figure 8 shows experimental data focusing on the field range of the g = 2 magnetic resonance for low-power microwave excitation at 33.7 GHz; simulations of these data are shown in Fig. 9.…”

“…Recently, various forms of ODMR have been applied to DMS bulk crystals and quantum wells. [14][15][16][17][18] A key distinction between CRESR and other forms of ODMR lies in the fact that, in CRESR, optical and microwave fields develop a finite degree of coherence when spin and optical resonance conditions are simultaneously met; this allows the use of sensitive heterodyne detection of the optical signal. The requirement of optical resonance conditions means that CRESR offers a site-selective ESR probe which depends on both ground and excited optical states and which has a wide range of potential applications; for example, the CRESR technique has been applied to the nitrogen-vacancy (NV) complex in diamond, 19 another system of great interest in optical quantum information processing applications 20 and to studies of metal centers in metalloproteins.…”