Cascaded Mach-Zehnder interferometer tunable filters

被引：28
作者：
Ovvyan, A. P. [1 ]
Gruhler, N. [1 ,2 ]
Ferrari, S. [2 ]
Pernice, W. H. P. [2 ]
机构：
[1] Karlsruhe Inst Technol, Inst Nanotechnol INT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
[2] Univ Munster, Inst Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany
来源：
JOURNAL OF OPTICS | 2016年 / 18卷 / 06期
关键词：
nanophotonic circuits; optical filters; interferometers; POWER THERMOOPTICAL SWITCH; SILICON; COMPACT; CENTERS;
D O I：
10.1088/2040-8978/18/6/064011
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
By cascading compact and low-loss Mach-Zehnder interferometers (MZIs) embedded within nanophotonic circuits we realize thermo-optically tunable optical filters for the visible wavelength range. Through phase tuning in either arm of the MZI, the filter response with maximum extinction can be shifted beyond one free-spectral range with low electrical power consumption. The working wavelength of our device is aligned with the emission wavelength of the silicon vacancy color center in diamond around 740 nm where we realize a filter depth beyond 36.5 dB. Our approach allows for efficient isolation of the emitted signal intensity in future hybrid nanodiamond-nanophotonic circuits.
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页数：7
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