Enhancement of optical parametric amplification in microresonators via gain medium parameter selection and mean cavity wall reflectivity adjustment

Asirim, Ozum Emre
Kuzuoğlu, Mustafa
This paper computationally investigates the effect of the polarization decay rate (gamma), and the peak resonance frequency (f(0)) on optical parametric amplification inside a low-loss micro resonator. It is found that, for lower values of the polarization decay rate and the peak resonance frequency, the magnitude of amplification can be significantly higher. However, it was also observed that beyond a certain threshold value of the polarization decay rate, the gain factor of the amplification sharply reduces to a negligible value. This suggests that the polarization decay rate of a material has a more profound effect on wave attenuation for the case of nonlinear wave propagation as compared to the case of linear wave propagation. This gain enhancing effect of the low polarization decay rate requires the resonator walls to be highly reflective. We found that below a certain value of the mean reflection coefficient of the resonator walls, the amplification becomes insignificant regardless of the value of the polarization decay rate. Numerical simulations are performed using the finite difference time domain method and the resulting gain variations are plotted and tabulated with respect to the polarization decay rate, peak resonance frequency, and the mean reflection coefficient of the micro resonator to illustrate this drastic gain enhancement.


Multiphoton core ionization dynamics of polyatomic molecules
Toffolı, Danıele; Decleva, Piero (IOP Publishing, 2013-07-28)
The two-photon core ionization dynamics of gas-phase methane, carbon monoxide and nitrogen have been studied with a recent implementation of the lowest order perturbation theory in the framework of density functional theory and a multicentric basis set expansion of bound and scattering states. Ionization cross sections and angular asymmetry parameters have been calculated for the case of a single radiation beam and for both linear and circular light polarizations in the fixed nuclei approximation. Expected ...
Influence of temperature on optical properties of electron-beam-evaporated ZnSe thin film
Gullu, H. H.; Isik, M.; Hasanlı, Nızamı; Parlak, Mehmet (IOP Publishing, 2020-07-01)
Structural and optical properties of ZnSe thin films grown by electron-beam evaporation technique were reported in the present paper. X-ray diffraction pattern exhibited a single peak around 27 degrees which is well-suited with cubic phase of the films. Energy dispersive X-ray spectroscopy analyses resulted in atomic composition ratio of Zn/Se nearly 1.0 which corresponds to the chemical formula of ZnSe. Transmission experiments were performed at various temperatures in between 10 and 300 K. The analyses of...
A theoretical study of chemical doping and width effect on zigzag graphene nanoribbons
Pekoz, Rengin; Erkoç, Şakir (Elsevier BV, 2009-12-01)
The energetics and the electronic properties of nitrogen- and boron-doped graphene nanoribbons with zigzag edges have been investigated using density functional theory calculations. For the optimized geometry configurations, vibrational frequency analysis and wavefunction stability tests have been carried out. Different doping site optimizations for a model nanoribbon have been performed and formation energy values of these sites revealed that zigzag edgesite for both of the dopants were the most favorable ...
Study on the long wavelength SiGe/Si heterojunction internal photoemission infrared photodetectors
Aslan, B; Turan, Raşit; Liu, HC (Elsevier BV, 2005-10-01)
The theory of internal photoemission in semiconductor heterojunctions has been investigated and the existing model has been extended by incorporating the effect of different effective masses in the active region and the substrate, nonspherical-nonparabolic bands, and the energy loss per collision. Photoresponse measurements on Si1-xGex/Si heterojunction internal photoemission (HIP) infrared photodetectors (IP) have shown that they are fit well by the theory. Qualitative model describing the mechanisms of ph...
Dispersive optical constants of Tl2InGaSe4 single crystals
Qasrawi, A. F.; Hasanlı, Nızamı (IOP Publishing, 2007-09-01)
The structural and optical properties of Bridgman method grown Tl2InGaSe4 crystals have been investigated by means of room temperature x-ray diffraction, and transmittance and reflectance spectral analysis, respectively. The x-ray diffraction technique has shown that Tl2InGaSe4 is a single phase crystal of a monoclinic unit cell that exhibits the lattice parameters of a = 0.77244 nm, b = 0.64945 nm, c = 0.92205 nm and beta = 95.03 degrees . The optical data have revealed an indirect allowed transition band ...
Citation Formats
O. E. Asirim and M. Kuzuoğlu, “Enhancement of optical parametric amplification in microresonators via gain medium parameter selection and mean cavity wall reflectivity adjustment,” JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44509.