Stark effect, polarizability, and electroabsorption in silicon nanocrystals

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Stark effect ( electroabsorption ) spectroscopy of photosynthetic reaction centers at 1 . 5 K : evidence that the special pair has a large excited - state polarizability

The Stark effect or electroabsorption spectrum of the Qr transition of the special pair, P, of Rb. sphaeroides reaction centers has been measured at 1.5 K in frozen glycerol/buffer glasses. Under these conditions, inhomogeneous broadening of the absorption band is minimized, and some structure is resolved in the absorption and Stark effect spectra. As a result it is possible to greatly refine e...

متن کامل

Hyperfine Stark effect of shallow donors in silicon

Giuseppe Pica,1,* Gary Wolfowicz,2,3 Matias Urdampilleta,2 Mike L. W. Thewalt,4 Helge Riemann,5 Nikolai V. Abrosimov,5 Peter Becker,6 Hans-Joachim Pohl,7 John J. L. Morton,2,8 R. N. Bhatt,9 S. A. Lyon,9 and Brendon W. Lovett1,3,* 1SUPA, School of Physics and Astronomy, University of St Andrews, KY16 9SS, United Kingdom 2London Centre for Nanotechnology, University College London, London WC1H 0A...

متن کامل

Silicon Nanocrystals

Silicon has many advantages over other semiconductor materials: low cost, nontoxicity, practically unlimited availability, and decades of experience in purification, growth and device fabrication. It is used for almost all modern electronic devices. However, the indirect energy gap in bulk crystalline Si makes it unable to emit light efficiently and thus unsuitable for optoelectronic applicatio...

متن کامل

Higher-Order Stark Spectroscopy: Polarizability of Photosynthetic Pigments

Stark spectra for nonoriented molecules with typical broad inhomogeneous line widths are obtained by applying an ac electric field and detecting the change in absorbance at the second harmonic of the field modulation frequency. The analysis of such data in terms of molecular parameters such as changes in dipole moment and polarizability is often difficult. We outline a new method, called higher...

متن کامل

Charge, Polarizability, and Photoionization of Single Semiconductor Nanocrystals

The electrostatic properties of individual CdSe nanocrystals are directly measured using electrostatic force microscopy (EFM) in dry air at room temperature. We determine that the static dielectric constant of CdSe nanocrystals with diameters 5 nm is uniform. However, the charge per nanocrystal is nonuniform, with some nanocrystals possessing a positive charge. Furthermore, a small fraction of ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review B

سال: 2010

ISSN: 1098-0121,1550-235X

DOI: 10.1103/physrevb.81.125333