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Linear Electro‐Optic Modulation in Highly Polarizable Organic Perovskites
- Source :
- Advanced Materials. 33:2006368
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Electrical-to-optical signal conversion is widely employed in information technology and is implemented using on-chip optical modulators. State-of-the-art modulator technologies are incompatible with silicon manufacturing techniques: inorganic nonlinear crystals such as LiNbO3 are integrated with silicon photonic chips only using complex approaches, and hybrid silicon-LiNbO3 optical modulators show either low bandwidth or high operating voltage. Organic perovskites are solution-processed materials readily integrated with silicon photonics; and organic molecules embedded within the perovskite scaffold allow in principle for high polarizability. However, it is found that the large molecules required for high polarizability also require an increase of the size of the perovskite cavity: specifically, using the highly polarizable DR2+ (R = H, F, Cl) in the A site necessitates the exploration of new X-site options. Only by introducing BF4- as the X-site molecule is it possible to synthesize (DCl)(NH4 )(BF4 )3 , a material exhibiting a linear EO coefficient of 20 pm V-1 , which is 10 times higher than that of metal halide perovskites and is a 1.5 fold enhancement compared to reported organic perovskites. The EO response of the organic perovskite approaches that of LiNbO3 (reff ≈ 30 pm V-1 ) and highlights the promise of rationally designed organic perovskites for use in efficient EO modulators.
- Subjects :
- Silicon photonics
Materials science
Silicon
business.industry
Mechanical Engineering
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Electro-optics
0104 chemical sciences
Optical modulator
chemistry
Mechanics of Materials
Modulation
Polarizability
Optoelectronics
Molecule
General Materials Science
0210 nano-technology
business
Perovskite (structure)
Subjects
Details
- ISSN :
- 15214095 and 09359648
- Volume :
- 33
- Database :
- OpenAIRE
- Journal :
- Advanced Materials
- Accession number :
- edsair.doi.dedup.....3beabd1cf0d5cb217eedf70cb766d277