YBa2Cu3O7 microwave resonators for strong collective coupling with spin ensembles

被引：53

作者：

Ghirri, A. ^{[1
]}

Bonizzoni, C. ^{[1
,2
]}

Gerace, D. ^{[3
]}

Sanna, S. ^{[3
]}

Cassinese, A. ^{[4
,5
]}

Affronte, M. ^{[1
,2
]}

机构：

[1] CNR, Ist Nanosci, Ctr S3, I-41125 Modena, Italy

[2] Univ Modena & Reggio Emilia, Dipartimento Fis Informat & Matemat, I-41125 Modena, Italy

[3] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[4] Univ Naples Federico II, CNR, SPIN, I-80138 Naples, Italy

[5] Univ Naples Federico II, Dipartimento Fis, I-80138 Naples, Italy

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 18期

关键词：

CAVITY; COHERENCE; DEVICES; PHOTON; QUBIT; EPR;

D O I：

10.1063/1.4920930

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Coplanar microwave resonators made of 330 nm-thick superconducting YBa2Cu3O7 have been realized and characterized in a wide temperature (T, 2-100 K) and magnetic field (B, 0-7 T) range. The quality factor (Q(L)) exceeds 10(4) below 55 K and it slightly decreases for increasing fields, remaining 90% of Q(L) (B = 0) for B = 7 T and T = 2K. These features allow the coherent coupling of resonant photons with a spin ensemble at finite temperature and magnetic field. To demonstrate this, collective strong coupling was achieved by using di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium organic radical placed at the magnetic antinode of the fundamental mode: the in-plane magnetic field is used to tune the spin frequency gap splitting across the single-mode cavity resonance at 7.75 GHz, where clear anticrossings are observed with a splitting as large as similar to 82 MHz at T = 2 K. The spin-cavity collective coupling rate is shown to scale as the square root of the number of active spins in the ensemble. (c) 2015 AIP Publishing LLC.

引用

页数：4

共 40 条

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