Ultrahigh sensitivity electric field detection with a liquid electro-optical film.

In this Letter, an electro-optical probe configuration with polar molecule liquids as the sensing film is proposed to improve the voltage sensitivity. This method exhibited increases in intrinsic sensitivities better than 0.1 mV/√Hz, 2 orders of magnitude larger than the normal method using a GaAs probe in the same measurement system. Based on the mechanism of orientation polarization, the electro-optic coefficient was measured to be 250 pm/V by the Teng-Man method at a modulation field of 100 Hz. This technology will be promising in applications of low-frequency field detection.

[1]  Qidai Chen,et al.  Optical probing of electric fields with an electro-acoustic effect toward integrated circuit diagnosis. , 2010, Optics letters.

[2]  Oleg Mitrofanov,et al.  Electro-optic effect in an unbalanced AlGaAs /GaAs microresonator , 2005 .

[4]  F. Kajzar,et al.  New insights into the relaxation of polar order in electro-optic polymers , 2008 .

[5]  C. C. Teng,et al.  Simple reflection technique for measuring the electro‐optic coefficient of poled polymers , 1990 .

[6]  O. Sugihara,et al.  Thermally stable and large second-order nonlinearity in poled silica films doped with Disperse Red 1 in high concentration. , 1995, Optics letters.

[7]  Mark G. Kuzyk,et al.  Mechanisms of quadratic electro-optic modulation of dye-doped polymer systems , 1990 .

[8]  Y. Tian,et al.  Ultralarge and Thermally Stable Electro‐optic Activities from Diels–Alder Crosslinkable Polymers Containing Binary Chromophore Systems , 2006 .

[9]  A. Heringa,et al.  The dependence of the electro‐optic effect on electric field distribution and light beam propagation direction , 1994 .

[10]  M. S. Heutmaker,et al.  Electro-optic sampling of high-speed silicon integrated circuits using a GaAs probe tip , 1991 .

[11]  T. Nagatsuma,et al.  Subpicosecond sampling using a noncontact electro‐optic probe , 1989 .

[12]  Qidai Chen,et al.  Tapered and Tip-Grounded Waveguide Electrooptical Microsensors , 2011, IEEE Photonics Journal.

[13]  Ajay Nahata,et al.  Electro-optic detection of femtosecond electromagnetic pulses by use of poled polymers. , 2002, Optics letters.

[14]  T. Bellini,et al.  Anomalous field-induced particle orientation in dilute mixtures of charged rod-like and spherical colloids , 2005 .

[15]  M. Siegel,et al.  Electro-optic sampling system with a single-crystal 4-N,N-dimethylamino-4′-N′-methyl-4-stilbazolium tosylate sensor , 2003 .