Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Suppression of spontaneous emission in a 1-D photonic bandgap structure: experimental demonstration

B. Boggs, Christoph M. Greiner, THOMAS W. MOSSBERG

Published Jan 1, 2001• 0 citations
Publisher

Abstract

Summary form only given. Recently, photonic bandgap structures (PBGS) and their optical properties have attracted great interest. Spontaneous emission from an atom or molecule in a PBGS may be manipulated both in spatial and temporal characteristics. This is accomplished by manipulating or altering the local environment (vacuum field) seen by the atom or molecule. PBGS accomplish this by reducing or enhancing (to varying degree) the vacuum field as seen by the atom in a spatial and frequency-dependant manner. We show a schematic of the experimental setup and the Er-doped fiber Bragg grating used.

DOI
10.1109/cleo.2001.948206

Related papers

Suppression of spontaneous emission in a 1D photonic bandgap structure: experimental demonstration

B. Boggs, Christoph M. Greiner, THOMAS W. MOSSBERG

Summary form only given. Recently, photonic bandgap structures (PBGS) and their optical properties have attracted great interest, both in terms of basic physics as well as from an applications aspect.The PBGS may be doped with optically active atoms or molecules removing the necessity of the atomic beam and the need to manually overlap the optical and atomic beams. Spontaneous emission from an atom or molecule in a PBGS may be manipulated both in spatial and temporal characteristics. This is accomplished by manipulating or altering the local environment (vacuum field) seen by the atom or molecule. PBGS accomplish this by reducing or enhancing (to varying degree) the vacuum field as seen by the atom in a spatial and frequency-dependant manner. We show a schematic of our experimental setup and the Er-doped fiber Bragg grating (FBG). The Er-doped FBG parameters such as peak reflectivity are given.

Quantum Electronics and Laser Science Conference•Nov 13, 2002•0 citations

Spontaneous-emission rates of quantum dots and dyes controlled with photonic crystals

Willem L. Vos

Chapter 1 IntroductionUltimate inhibition of spontaneous emission can be achieved in artificial periodic structures with tailor-made forbidden frequency bands [5].These periodic structures known as photonic crystals consist of different dielectric materials, where the index of refraction varies on length scales comparable to the wavelength of light.Therefore, the periodicity of photonic crystals is about 1000 times as large as that of atomic crystals.Light with specific frequencies is forbidden to propagate along certain directions by wave interference, similarly to Bragg diffraction of x-rays in atomic crystals.Such forbidden frequency ranges are called stopgaps.The larger the contrast of the refractive index between the two materials of a photonic crystal, the more strongly light is influenced, and the broader the stopgaps become.It was predicted in 1987 that an extreme situation may be feasible when light cannot propagate along any direction [6, 7].This situation is called a photonic bandgap.Spontaneous emission is completely inhibited for frequencies inside such a bandgap and, conversely, strongly enhanced for frequencies outside the bandgap.Photonic crystals, therefore, provide an ultimate tool for manipulating with light, which is of extreme interest for scientists and engineers [8, 9].Recent advances in nanotechnology have resulted in ability to synthesize semiconductor structures with dimensions of a few nanometers.Due to the finite sizes, electron-hole pairs (excitons) can be confined in these nanostructures, which leads to discrete excitonic energy levels.The nanocrystals that confine excitons in spherical or circular spaces are known as quantum dots.The discrete structure of the energy levels results in advantageous optical properties of these nanocrystals: narrow and tunable emission spectra.The emission frequencies can be tuned by varying the nanocrystal size: the smaller the size, the higher the emission frequency.These properties make the nanocrystals very promising elementary emitters for new experiments and devices [10, 11]. Outline of the thesisThis thesis describes time-and angle-resolved experiments, in which effects of threedimensional (3D) photonic crystals on spontaneous emission of embedded light sources (quantum dots and dye molecules) were studied.The thesis is organized as follows:In Chapter 2 we review the theoretical basics of the interaction between light and matter.We discuss the factors triggering the process of spontaneous emission and consider in detail the time evolution of the excited state of the emitter that interacts with the quantized 1.

•Nov 2, 2006•4 citations

An Erbium-Doped 1-D Fiber-Bragg Grating and Its Effect Upon Er3+ Radiative Spontaneous Emission

B. Boggs

Spontaneous atomic emission is not a process of the isolated atom but rather a cooperative effect of the atom and the vacuum field. It is now well established that spontaneous radiative decay rates can be enhanced or suppressed through the effect of cavities comprising various types of discrete, reflective-mirror type, boundaries. The cavity effect is generally understood in terms of a cavity-induced modification of the vacuum spectral energy density. Recently, interest has grown in the possibility that systems characterized by distributed periodic boundary conditions, such as a spatially varying index of refraction, might be effective in controlling radiative atomic processes.\n\nA semi-classical theory is given that enables an estimate of the size of the lifetime modification of a two-level radiator contained within a three-dimensionally incomplete photonic bandgap structure called a fiber-Bragg grating. Following this is an exploration of a specific system and its effect upon radiative spontaneous emission. It is found through fluorescence line narrowing and frequency hole burning measurements that the observation of lifetime modification of the specific system is complicated due to intra and inter Stark energy migration. A lifetime modification measurement then shows that no change in lifetime is observed beyond the error bars on the measurement results.\n\nThe tuning and coherence properties of a short-external-cavity diode laser that may be useful for future time-dependent spectroscopic measurements are examined using a fiber-based, self-heterodyne technique. Coherence properties during active frequency scans are characterized through analysis of time-dependent heterodyne beat signals at the output of a fiber interferometer.

•Jul 11, 2013•0 citations

Inhibition of spontaneous emission by a random dielectric medium

N. M. Lawandy, Jordi Martorell

In 1946 Purcell showed that the spontaneous emission rate of an atomic system could be enhanced by placing it in a conducting cavity. Later, Kleppner showed that spontaneous emission could also be inhibited if the vacuum modes coupled to the atom were excluded by a structure. Most recently, we experimentally have shown that a periodic dielectric structure could alter the spontaneous emission by Bragg scattering of vacuum fluctuations.1 The structure used was a colloidal crystal with a face-centered cubic structure whose (111) planes were separated by optical dimensions.

Annual Meeting Optical Society of America•Jan 1, 1990•0 citations

Photonic crystals boost light emission

Misha Boroditsky, Ell Yablonovitch

For many years spontaneous emission of light was considered a natural and immutable property of radiating atoms. But we now know that spontaneous emission can be controlled by altering the environment of the atom: for example metal mirror can be placed next to the atom, or it can be enclosed inside metallic cavity or a photonic crystal. In this way, the vacuum fluctuations or zero-point electromagnetic fields in the atom's environment can be manipulated.

Physics World•Jul 1, 1997•6 citations

Collective emission of atoms in photonic bandgap materials

Vyacheslav I. Yukalov

A system of resonance atoms doped into a photonic bandgap material is considered in the case when the resonance transition frequency lies within the band gap. Spontaneous emission of a single atom is suppressed in this situation, which is called the light localisation. It is shown that, if the density of the doped atoms is sufficiently high, the coherent interaction between atoms can appear, resulting in the emission of a single or a series of coherent pulses by a system of atoms.

Quantum Electronics•Oct 31, 2000•2 citations
Summary form only given. Recently, photonic bandgap structures (PBGS) and their optical properties have attracted great interest. Spontaneous emission from an atom or molecule in a PBGS may be manipulated both in spatial and temporal characteristics. This is accomplished by manipulating or altering the local environment (vacuum field) seen by the atom or molecule. PBGS accomplish this by reducing or enhancing (to varying degree) the vacuum field as seen by the atom in a spatial and frequency-dependant manner. We show a schematic of the experimental setup and the Er-doped fiber Bragg grating used.
Summary form only given. Recently, photonic bandgap structures (PBGS) and their optical properties have attracted great interest, both in terms of basic physics as well as from an applications aspect.The PBGS may be doped with optically active atoms or molecules removing the necessity of the atomic beam and the need to manually overlap the optical and atomic beams. Spontaneous emission from an atom or molecule in a PBGS may be manipulated both in spatial and temporal characteristics. This is accomplished by manipulating or altering the local environment (vacuum field) seen by the atom or molecule. PBGS accomplish this by reducing or enhancing (to varying degree) the vacuum field as seen by the atom in a spatial and frequency-dependant manner. We show a schematic of our experimental setup and the Er-doped fiber Bragg grating (FBG). The Er-doped FBG parameters such as peak reflectivity are given.
Chapter 1 IntroductionUltimate inhibition of spontaneous emission can be achieved in artificial periodic structures with tailor-made forbidden frequency bands [5].These periodic structures known as photonic crystals consist of different dielectric materials, where the index of refraction varies on length scales comparable to the wavelength of light.Therefore, the periodicity of photonic crystals is about 1000 times as large as that of atomic crystals.Light with specific frequencies is forbidden to propagate along certain directions by wave interference, similarly to Bragg diffraction of x-rays in atomic crystals.Such forbidden frequency ranges are called stopgaps.The larger the contrast of the refractive index between the two materials of a photonic crystal, the more strongly light is influenced, and the broader the stopgaps become.It was predicted in 1987 that an extreme situation may be feasible when light cannot propagate along any direction [6, 7].This situation is called a photonic bandgap.Spontaneous emission is completely inhibited for frequencies inside such a bandgap and, conversely, strongly enhanced for frequencies outside the bandgap.Photonic crystals, therefore, provide an ultimate tool for manipulating with light, which is of extreme interest for scientists and engineers [8, 9].Recent advances in nanotechnology have resulted in ability to synthesize semiconductor structures with dimensions of a few nanometers.Due to the finite sizes, electron-hole pairs (excitons) can be confined in these nanostructures, which leads to discrete excitonic energy levels.The nanocrystals that confine excitons in spherical or circular spaces are known as quantum dots.The discrete structure of the energy levels results in advantageous optical properties of these nanocrystals: narrow and tunable emission spectra.The emission frequencies can be tuned by varying the nanocrystal size: the smaller the size, the higher the emission frequency.These properties make the nanocrystals very promising elementary emitters for new experiments and devices [10, 11]. Outline of the thesisThis thesis describes time-and angle-resolved experiments, in which effects of threedimensional (3D) photonic crystals on spontaneous emission of embedded light sources (quantum dots and dye molecules) were studied.The thesis is organized as follows:In Chapter 2 we review the theoretical basics of the interaction between light and matter.We discuss the factors triggering the process of spontaneous emission and consider in detail the time evolution of the excited state of the emitter that interacts with the quantized 1.
Spontaneous atomic emission is not a process of the isolated atom but rather a cooperative effect of the atom and the vacuum field. It is now well established that spontaneous radiative decay rates can be enhanced or suppressed through the effect of cavities comprising various types of discrete, reflective-mirror type, boundaries. The cavity effect is generally understood in terms of a cavity-induced modification of the vacuum spectral energy density. Recently, interest has grown in the possibility that systems characterized by distributed periodic boundary conditions, such as a spatially varying index of refraction, might be effective in controlling radiative atomic processes.\n\nA semi-classical theory is given that enables an estimate of the size of the lifetime modification of a two-level radiator contained within a three-dimensionally incomplete photonic bandgap structure called a fiber-Bragg grating. Following this is an exploration of a specific system and its effect upon radiative spontaneous emission. It is found through fluorescence line narrowing and frequency hole burning measurements that the observation of lifetime modification of the specific system is complicated due to intra and inter Stark energy migration. A lifetime modification measurement then shows that no change in lifetime is observed beyond the error bars on the measurement results.\n\nThe tuning and coherence properties of a short-external-cavity diode laser that may be useful for future time-dependent spectroscopic measurements are examined using a fiber-based, self-heterodyne technique. Coherence properties during active frequency scans are characterized through analysis of time-dependent heterodyne beat signals at the output of a fiber interferometer.
In 1946 Purcell showed that the spontaneous emission rate of an atomic system could be enhanced by placing it in a conducting cavity. Later, Kleppner showed that spontaneous emission could also be inhibited if the vacuum modes coupled to the atom were excluded by a structure. Most recently, we experimentally have shown that a periodic dielectric structure could alter the spontaneous emission by Bragg scattering of vacuum fluctuations.1 The structure used was a colloidal crystal with a face-centered cubic structure whose (111) planes were separated by optical dimensions.