[1] Kitching J. Chip-scale atomic devices[J]. Applied Physics Reviews, 5, 031302(2018).

[2] Li S L, Xu J, Zhang Z Q et al. Integrated physics package of a chip-scale atomic clock[J]. Chinese Physics B, 23, 074302(2014). http://www.cqvip.com/QK/85823A/201407/50311095.html

[3] Hirai Y, Terashima K, Nakamura K et al. Low temperature, wafer-level process of alkali-metal vapor cells for micro-fabricated atomic clocks. [C]∥2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), June 18-22, 2017, Kaohsiung, Taiwan, China. New York: IEEE, 431-434(2017).

[4] Wang X M, Meng Y L, Li L et al. Frequency and intensity noises of probe laser in integrating sphere cold atom clock[J]. Chinese Journal of Lasers, 44, 0912001(2017).

[5] Knapkiewicz P. Alkali vapor MEMS cells technology toward high-vacuum self-pumping MEMS cell for atomic spectroscopy[J]. Micromachines, 9, 405(2018). http://www.mdpi.com/2072-666X/9/8/405

[6] Tang Y, Ren Z M, Li Y C et al. Fabrication and study of micro alkali-metal vapor cell applied to chip scale atomic clock[J]. Laser & Optoelectronics Progress, 55, 040201(2018).

[7] Gao Y, Dong H F, Wang X et al. Combined effect of light intensity and temperature on the magnetic resonance linewidth in alkali vapor cell with buffer gas[J]. Chinese Physics B, 26, 067801(2017). http://cpb.iphy.ac.cn/CN/abstract/abstract70159.shtml

[8] Kroemer E, Abdel Hafiz M, Maurice V et al. Cs vapor microcells with Ne-He buffer gas mixture for high operation-temperature miniature atomic clocks[J]. Optics Express, 23, 18373-18380(2015). http://www.ncbi.nlm.nih.gov/pubmed/26191895

[9] Deng K, Guo T, He D W et al. Effect of buffer gas ratios on the relationship between cell temperature and frequency shifts of the coherent population trapping resonance[J]. Applied Physics Letters, 92, 211104(2008). http://scitation.aip.org/content/aip/journal/apl/92/21/10.1063/1.2937407

[10] Li Q M, Zhang J H, Zeng X J et al. Optimized condition for buffer gas in cesium atomic magnetometer[J]. Laser & Optoelectronics Progress, 50, 072802(2013).

[11] Qu S P, Zhang Y, Gu S H. Dependence of the 85Rb coherent population trapping resonance characteristic on the pressure of N2 buffer gas [J]. Chinese Physics B, 22, 099501(2013). http://www.cnki.com.cn/Article/CJFDTotal-ZGWL201309106.htm

[12] Kozlova O. Guérandel S, de Clercq E. Temperature and pressure shift of the Cs clock transition in the presence of buffer gases: Ne, N2, Ar[J]. Physical Review A, 83, 062714(2011).

[13] Zheng H F, Li J, Feng K M et al. Frequency discrimination for passive hydrogen maser based on single frequency modulation[J]. Chinese Journal of Lasers, 45, 0311001(2018).

[14] Vanier J, Audoin C[M]. The quantum physics of atomic frequency standards, 685-686(1989).

[15] Boudot R, Miletic D, Dziuban P et al. First-order cancellation of the Cs clock frequency temperature-dependence in Ne-Ar buffer gas mixture[J]. Optics Express, 19, 3106-3114(2011). http://www.ncbi.nlm.nih.gov/pubmed/21369132