We present high accuracy measurements of gain, loss, and transparency energy in long-wavelength semiconductors based on a hybrid approach using the fundamental relationship between the gain and the spontaneous emission spectra. Independent measurements of optical gain, transparency energy, and loss show the accuracy and validity of this technique. These results are compared with those obtained ...

The problem of spontaneous emission of sound waves from shocks in solids is investigated. A self-consistent model of the medium is constructed that allows the calculations of the various thermodynamic properties such as the internal energy, the entropy, the Gruneisen parameter and in particular the Mach number behind the shock. The latter is employed in calculating the stability criterion that ...

1999 ii The dissertation of Mikhail Boroditsky is approved. Figure 1. (a) A small section of an infinite dielectric slab with a triangular array of through holes resting on a glass substrate; (b) Unit cell used for the computation of the frequency ν vs. wave-vector k dispersion relationship. Figure 2. Dispersion diagram of TE-like modes of the infinite photonic crystal shown in Fig. 1(a). Figur...

We present phase-space techniques for the modelling of spontaneous emission in two-level bosonic atoms. The positive-P representation is shown to give a full and complete description within the limits of our model. The Wigner representation, even when truncated at second order, is shown to need a doubling of the phase-space to allow for a positive-definite diffusion matrix in the appropriate Fo...

The Perrin-Forster theory of sensitized fluorescence is extended by replacing the Coulomb interaction wth its relativistic counterpart, the Breit interaction. The transition matrix element is evaluated in a multipole expansion. The matrix element i s found to be modulated by the retardation factor eikR and to contain terms whch fall off only as l/R. The relation of these terms to spontaneous ph...

An ensemble of resonance atoms is considered, which are doped into a medium with well developed polariton effect, when in the spectrum of polariton states there is a band gap. If an atom with a resonance frequency inside the polariton gap is placed into the medium, the atomic spontaneous emission is suppressed. However, a system of resonance atoms inside the polariton gap can radiate when their...

Dopants in silicon (Si) have attracted attention in the fields of photonics and quantum optics. However, the optical characteristics are limited by the small spontaneous emission rate of dopants in Si. This study demonstrates a large increase in the spontaneous emission rate of copper isoelectronic centres (Cu-IECs) doped into Si photonic crystal nanocavities. In a cavity with a quality factor ...

An integrated tunable C band laser fabricated in a commercial CMOS foundry is discussed. The laser is embedded in the silicon chip, and is hermetically sealed. Preliminary optical characterization results are presented. OCIS codes: (250.5960) Semiconductor Lasers; (250.5300) Photonic Integrated Circuits; (140.3600) Lasers, tunable

We show that under the influence of pure vacuum noise two entangled qubits become completely disentangled in a finite-time, and in a specific example we find the time to be given by ln((2+sqrt[2] / 2) times the usual spontaneous lifetime.

Hyperbolic metamaterials can enhance spontaneous emission, but the radiation-matter coupling is not optimized if the light source is placed outside such media. We demonstrate a 3-fold improvement of the Purcell factor over its outer value and a significant enlargement in bandwidth by including the emitter within a Si/Ag periodic multilayer metamaterial. To extract the plasmonic modes of the str...