Reconfigurable Quantum-Dot Molecules Created by Atom Manipulation.
نویسندگان
چکیده
Quantum-dot molecules were constructed on a semiconductor surface using atom manipulation by scanning tunneling microscopy (STM) at 5 K. The molecules consist of several coupled quantum dots, each of which comprises a chain of charged adatoms that electrostatically confines intrinsic surface-state electrons. The coupling takes place across tunnel barriers created reversibly using the STM tip. These barriers have an invariant, reproducible atomic structure and can be positioned-and repeatedly repositioned-to create a series of reconfigurable quantum-dot molecules with atomic precision.
منابع مشابه
Quantization of electromagnetic fields in the presence of a spherical semiconductor quantum dot and spontaneous decay of an excited atom doped in this nanostructure
In this paper we consider electromagnetic field quantization in the presence of a dispersive and absorbing semiconductor quantum dot. By using macroscopic approach and Green's function method, quantization of electromagnetic field is investigated. Interaction of a two-level atom , which is doped in a semiconductor quantum dot, with the quantized field is considered and its spontaneous emission ...
متن کاملAnalytic pulse design for selective population transfer in many-level quantum systems: maximizing the amplitude of population oscillations
State selective preparation and manipulation of discrete-level quantum systems such as atoms, molecules or quantum dots is a the ultimate tool for many diverse fields such as laser control of chemical reactions, atom optics, high-precision metrology and quantum computing [1]. Rabi oscillations [2] are one of the simplest, yet potentially quite useful mechanisms for achieving such manipulation. ...
متن کاملCoherent manipulation of a solid-state artificial atom with few photons
In a quantum network based on atoms and photons, a single atom should control the photon state and, reciprocally, a single photon should allow the coherent manipulation of the atom. Both operations require controlling the atom environment and developing efficient atom-photon interfaces, for instance by coupling the natural or artificial atom to cavities. So far, much attention has been drown on...
متن کاملQuantum theory of the plasmon enhanced Raman scattering effect in hybrid nanotube systems
The quantum theory of resonance Raman scattering is developed for a dipole emitter, the two-level system (TLS), coupled to an interband plasmon resonance of a carbon nanotube (CN) [1]. The model used belongs to a broad class of driven four-level quantum systems [2], with an important distinction that instead of being driven by an external periodic field, scattering by the interacting TLS-CN sys...
متن کاملMultipolar Interband Absorption in a Semiconductor Quantum Dot: Electric Quadrupole Enhancement
LLE Review, Volume 91 139 Introduction A quantum dot is an artificially created semiconductor structure in the size range of 5 to 100 nm. As a whole, it behaves like an atom since the quantum effects of the confined electrons are enlarged with respect to the interactions of the electrons inside each atom. Since the conception of quantum dots in the early 1980s, the study of their physical prope...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 115 7 شماره
صفحات -
تاریخ انتشار 2015