[14p-D221-1~16] 6.2 カーボン系薄膜

▼ [14p-D221-3] Temperature Dependence of Photoluminescence from Heavy Group-IV Color Centers in Diamond

〇(M1)PENG WANG¹、Takashi Taniguchi²、Yoshiyuki Miyamoto³、Mutsuko Hatano¹、Takayuki Iwasaki¹ (1.Tokyo Institute of Technology、2.NIMS、3.AIST)

キーワード：diamond, SnV center, PbV center

Color centers in diamond are promising candidates for quantum network applications. Compared with nitrogen-vacancy (NV) center, color centers based on group-IV elements (SnV as representative), show sharp ZPLs with suppressed phonon side bands. In this study, we report the detailed temperature behavior of the fluorescence from the SnV in diamond, and also from a heavier element center, called lead-vacancy (PbV) centers. At cryogenic temperatures, the split ground and excited states of SnV center give rise to four optical transition paths. With increasing temperature, the four obvious peaks merge into two, then into a single broaden peak. The peak shifts of those transition take on the same tendency: relatively flat at low temperatures and decreasing rapidly after a threshold temperature. We also observed the similar temperature-dependent behavior in PbV centers.