Electron spin dynamics in Ce3+ : YAG crystals: Hyperfine interaction of 4f and

Polarization-dependent photoluminescence of Ce-implanted MgO and MgAl2O4

“…This behavior is consistent with Ce-doped YAG, 16,17) whose D increases with increasing H due to the decoupling through the Zeeman energy of the ground states coupled through the surrounding nuclear spins. 16) The magnitude of D is mainly determined by T 2 1) and emission lifetime T emi . When the sample shows finite polarization-dependent PL, T emi satisfies < T T.…”

“…38) Figure 3(c) shows the polarization-dependent PL spectra at 4 K with different μ 0 H. D increases with increasing H and reaches 2% at μ 0 H = 500 mT. This behavior is consistent with Ce-doped YAG, 16,17) whose D increases with increasing H due to the decoupling through the Zeeman energy of the ground states coupled through the surrounding nuclear spins. 16) The magnitude of D is mainly determined by T 2 1) and emission lifetime T emi .…”

“…The degree of the circular polarization is defined as ) with different spin-orbit interaction. 16) D of these peaks in Ce-doped YAG was reported up to 36% and down to −15%. 16) Our results on Ce-implanted MgO show no clear and finite D at 5 K, unlike Ce center in YAG.…”

“…16) D of these peaks in Ce-doped YAG was reported up to 36% and down to −15%. 16) Our results on Ce-implanted MgO show no clear and finite D at 5 K, unlike Ce center in YAG. 16,17) This suggests that the PL signal from Ce-implanted MgO is not from the 5d-4f emission of Ce 3+ , but possibly from oxygen defects 32,33) and/or from chargetransfer transitions by the hybridization of the 5d orbitals of Ce and 2p orbitals of adjacent oxygen.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Typical materials are nitrogen-vacancy (NV) center in diamond 3,[7][8][9][10][11] and divacancy (VV) center in silicon carbide, 5,6) which have a long spin coherence time (T 2 ) even at RT and achieve high fidelity spin control 14,15) and readout. [2][3][4] Recently, using the polarization-and spindependent optical properties [16][17][18][19][20] in the single substitutional lanthanoids defect in oxides, 19) such as Y 3 Al 5 O 12 :Ce 3+ (YAG) with S = 1/2 16,17) and YAG:Pr 3+ with S = 1, 20) optically detected magnetic resonance are investigated, demonstrating the operation, namely initialization, writing, readout of the spin qubit state. 17) Since the qubit's performance of solid-state spin centers depends highly on the host material, spin centers using new host materials may offer new qubit applications.…”