Optical spectroscopy of opal matrices with CdS embedded in its pores: Quantum confinement and photonic band gap effects

Astratov, Vasily N.; Bogomolov, V. N.; Kaplyanskiǐ, A. A.; Prokofiev, A. V.; Samoilovich, L. A.; Samoilovich, S. M.; Vlasov, Yu. A.

doi:10.1007/bf02457208

Cited by 226 publications

(96 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The spectral width of the PSB is dependent on refractive index contrast and can be changed by filling the voids of opal with suitable substances [60]. Modern technology allows to fill opal voids with various dielectrics [61], semiconductors [38,60], liquid crystals [62], and metals [63].…”

Section: Artificial Opalsmentioning

confidence: 99%

Ultrafast Optical Switching in Three-Dimensional Photonic Crystals

et al. 2003

View full text Add to dashboard Cite

Section: Artificial Opalsmentioning

confidence: 99%

Ultrafast Optical Switching in Three-Dimensional Photonic Crystals

et al. 2003

View full text Add to dashboard Cite

“…Dark aggregations around them correspond to semiconductor inclusions. Additional studies [18] have shown that a size of CdS crystallites (average value ~10 nm) is bigger than the exciton Bohr radius in this material (αB = 2.8 nm). Consequently, the semiconductor phase occurs in the so-called regime of weak quantum confinement [19].…”

Section: Sample Preparation and Characterizationmentioning

confidence: 69%

Light-Induced Modification of 3D Photonic Band Structure Detected by Means of Photoreflection

et al. 1999

View full text Add to dashboard Cite

Porous synthetic opal possessing a three-dimensional photonic band structure of semimetallic type was impregnated with polycrystalline CdS. The photonic stop band in (111) direction was examined by means of photoreflection technique. Under cw laser excitation of semiconductor inclusions the reflectance of the system changes indicating a modification of photonic band structure. A possible mechanism is discussed. Numerical simulations within the framework of quasicrystalline approximation are given.

show abstract

“…The PI of this project [VA] came to this area with a strong background in studies of synthetic opals [23][24][25][26][27][28] which are 3D lattices of silica nanospheres. In addition the PI [VA] had an extensive experience in studies of photonic crystal waveguides [29][30][31][32][33][34] and semiconductor microcavities [35][36][37][38] .…”

Section: Statement Of the Problem Studiedmentioning

confidence: 99%

Resonant optical circuits based on coupling between whispering gallery modes in dielectric microresonators

Astratov

Franchak

Ashili

et al. 2004

Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technolo

View full text Add to dashboard Cite

The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. The project was devoted to advancing understanding of the optical properties of mesoscopic systems of coupled spherical cavities. Using numerical modeling, we studied optical coupling between spherical cavities with detuned whispering gallery mode (WGMs) resonances. The results were found to be in agreement with experiments performed on size-mismatched bispheres with controllable inter-cavity gaps. We observed new type of optical modes, termed "nanojet-induced modes", in straight chains of microspheres. Due to subwavelength sizes of the periodically focused spots and small propagation losses (<0.1dB/sphere) these modes were shown to be very promising for developing novel devices. The 3D lattices of closely Resonant Optical Circuits Based on Coupling Between Whispering Gallery Modes in Dielectric MicroresonatorsReport Title ABSTRACTThe project was devoted to advancing understanding of the optical properties of mesoscopic systems of coupled spherical cavities. Using numerical modeling, we studied optical coupling between spherical cavities with detuned whispering gallery mode (WGMs) resonances. The results were found to be in agreement with experiments performed on size-mismatched bispheres with controllable inter-cavity gaps. We observed new type of optical modes, termed "nanojet-induced modes", in straight chains of microspheres. Due to subwavelength sizes of the periodically focused spots and small propagation losses (<0.1dB/sphere) these modes were shown to be very promising for developing novel devices. The 3D lattices of closely packed spherical cavities were synthesized by flow-assisted self-assembly with the thickness well controllable up to 100 monolayers. By analogy with the percolation theory we argued that by selecting more uniform spheres it should be possible to achieve an optical percolation threshold for WGM-related transport in such systems. Along with dielectric microspheres we studied GaAs/AlGaAs pillar microcavities where we observed WGMs with Q-factors up to 20000 and small modal volumes. The results of this project are important for developing microprobes for biochemical sensing with subwavelength spatial resolution, reconfigurable filters, sensors and single photon sources.

show abstract

Optical spectroscopy of opal matrices with CdS embedded in its pores: Quantum confinement and photonic band gap effects

Abstract: ricevuto il 6 Settembre 1995) PACS 71.35 -Excitons and related phenomena (including electron-hole drops). PACS 78.66.Hf-II-VI semiconductors. PACS 42.25.Bs -Wave propagation, transmission and absorption.

Cited by 226 publications

References 8 publications

Ultrafast Optical Switching in Three-Dimensional Photonic Crystals

Ultrafast Optical Switching in Three-Dimensional Photonic Crystals

Light-Induced Modification of 3D Photonic Band Structure Detected by Means of Photoreflection

Resonant optical circuits based on coupling between whispering gallery modes in dielectric microresonators

Contact Info

Product

Resources

About