Osa rotationinduced asymmetry of farfield emission. Optical parametric oscillation is a nonlinear process that enables coherent generation of signal and idler waves, shifted in frequency from the pump wave1,2. A coupledmode theory is employed to provide a quantitative explanation and guidance on the. Absorption, spontaneous emission and stimulated emission. By tuning the photon cavity mode to the maximum of the luminescence band for the f 2 centers. The coupling ratio of spontaneous emission into a laser mode increases to be as large as 0. The microring laser is characterized by a welldefined, low threshold pump power, with reduced mode spacing and high qvalue when the diameter of ddhpof increases, the number of lasing peaks increases along with the decrease of the fsr as observed from our studies. The presence of the cavity causes great modifications in the emission spectrum and spatial emission intensity. The coupling ratio of spontaneous emission into a laser mode was as large as 0.
Different diameter freestanding cylindrical microcavity lasers have been fabricated and their performances have been evaluated. Spontaneous emission and laser oscillation in microcavities presents the basics of optical microcavities. The book surveys several methods describing free space spontaneous emission and discusses changes in the feature due to the presence of a cavity. The volume is divided into ten chapters, each written by respected authorities in their areas. Impact of planar microcavity effects on light extractionpart i. Prospects for lasers, lightemitting diodes and single photon sources based on. Spontaneous emission and laser oscillation in microcavities 1st edit. In quantum optical devices, microcavities can coax atoms or quantum dots to emit. Moreover, it has been demonstrated that very large.
An experimental study on spontaneous and stimulated emission properties of planar optical microcavities confining an organic dye solution is reported. Spontaneous emission and laser oscillation in microcavities laser. Multimode laser emission from freestanding cylindrical. Spontaneous emission in microcavity surface emitting lasers is covered, as are the effects of electron confinement in semiconductor quantum wells, wires, and. We study rotationinduced asymmetry of farfield emission from optical microcavities, based on which a new scheme of rotation detection may be developed. Spontaneous emission and laser oscillation in microcavities crc press. Spectral linewidth in microcavity surfaceemitting lasers deep blue. Controlling spontaneous emission and thresholdless laser. Pdf terahertz emission from multiple microcavities. Spontaneous emission and laser oscillation properties of microcavities containing a dye solution. Differences between the spontaneous emission dominant regime and the stimulated emission dominant regime were also examined with emission spectra and emission lifetime measurements. Parametric oscillation in vertical triple microcavities.
Experimentally verification is presented using planar optical microcavities confining an organic dye solution. It is free from the dead zone caused by the frequency splitting of standingwave resonances at rest, in contrast to the sagnac effect. Such a soft turnon lasing is typically observed in microcavity lasers in which spontaneous emission efficiently couples to the lasing mode11,15,16. If most molecules are in state 2, absorption of incoming radiation is hindered. We describe the alteration of spontaneous emission of materials in optical microcavities having dimensions on the order of the emitted wavelength. Spontaneous emission and laser oscillation properties of. Spontaneous emission and laser oscillation in microcavities. Ultrafast photonic crystal nanocavity laser stanford university. Request pdf spontaneous emission in microcavities the transverse distributions of intensity inside and outside an optical cavity produced by spontaneous emission from atoms inside the cavity. Particular attention is paid to onedimensional optical confinement structures with pairs of planar reflectors planar microcavities. Spontaneous emission coupling factor and mode characteristics of planar dielectric microcavity lasers. Contents controlling spontaneous emission dynamics in. Whisperinggallery microcavities with unidirectional laser. Optical microcavities based on lithium fluoride films treated by lowenergy electrons to create visibleemitting f 2 color centers have been fabricated, and their radiative properties characterized for the first time.
We put stress on basics of the controlling spontaneous emission and the laser oscillation of optical microcavities rather than on material physics aspects of semiconductor lasers. Laser oscillation in a strongly coupled single quantum dot. Spontaneous emission properties of color centers based. Here, simplified discussions are mainly developed within the framework of fermi golden rule, from the device design application point of view.
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