Nonlinear frequency conversion of light inside a microcavity

Changing the color of light in a small mode volume is essential for applications that require on-chip operation. Microcavities are profound structures given their property to confine light in a small mode volume. Here, I numerically investigate the frequency conversion of light in a microcavity and show that the frequency converted light intensity is distinguished from an open medium such as an optical fiber or a nonlinear crystal. I observe that the frequency converted light intensity increases with increased rate of change of the refractive index of the microcavity. Notably, this study shows that the intensity of the frequency converted light is maximized when the duration of the index perturbation is matched to the cavity storage time. The results provide a set of optimum parameters for increasing frequency conversion efficiency inside a microcavity.


Nonlinear mode coupling and sheared flow in a rotating plasma
Uzun Kaymak, İlker Ümit; Choi, S.; Clary, M. R.; Ellis, R. F.; Hassam, A. B.; Teodorescu, C. (IOP Publishing, 2009-01-01)
Shear flow is expected to stabilize the broad spectrum of interchange modes in rotating plasmas. However, residual fluctuations may still persist. To investigate the presence of such fluctuations, sixteen magnetic pickup coils equally spaced on a crown have been mounted inside the vacuum vessel, at the edge of a rotating plasma in mirror configuration. A comprehensive analysis of the magnetic fluctuations shows that very low spatial mode numbers survive under the imposed shear flow. Nevertheless, temporal F...
Broadband spectral splitting of white light via 2D diffractive optical elements
Başay, Yalın; Yüce, Emre (The Scientific and Technological Research Council of Turkey, 2018-10-01)
An effective way of increasing the efficiency of solar cells is to spectrally split sunlight into several frequencies and absorb each frequency using appropriate photovoltaic materials. In this study, we establish a method to show spectral splitting of broadband solar light via iteratively optimized diffractive optical elements. We develop an algorithm in order to calculate 2D holographic patterns that focus two different frequencies to designated positions.
Coexistence of Indirect and Direct Optical Transitions, Refractive Indices, and Oscillator Parameters in TlGaS2, TlGaSe2, and TlInS2 Layered Single Crystals
Hasanlı, Nızamı (Korean Physical Society, 2010-07-01)
The optical properties of TlGaS2; TlGaSe2, and TlInS2 crystals have been investigated through transmission and reflection measurements in the wavelength range of 400 - 1100 nm. Optical indirect and direct band gap energies of 2.45 and 2.63 eV (TlGaS2), 1.97 and 2.26 eV (TlGaSe2), 2.27 and 2.47 eV (TlInS2) were found by analyzing the absorption data at room temperature. The transmission measurements carried out in the temperature range of 10 - 300 K revealed that the rates of change of the indirect band gaps...
Spectroscopic study and numerical simulation of low-pressure radio-frequency capacitive discharge with argon downstream
Tanisli, Murat; Rafatov, İsmail; Sahin, Neslihan; Mertadam, Sercan; Demir, Suleyman (Canadian Science Publishing, 2017-02-01)
In this study, the characteristic properties and plasma parameters of capacitive radio frequency (RF) argon (Ar) discharge and supplementary discharge at low pressure are investigated with optical emission spectroscopy (OES). The wavelengths of spectral lines from OES are obtained between 650-900 nm. Using OES lines and related experimental data, the electron temperatures for different RF power, flow, and measurement periods are determined. Eventually, the properties of plasma including the electron tempera...
Atmospheric aging and light-induced degradation of amorphous and nanostructured silicon using photoconductivity and electron spin resonance
Saleh, Z. M.; Nogay, G.; Ozkol, E.; Yilmaz, G.; Sagban, M.; GÜNEŞ, MEHMET; Turan, Raşit (Canadian Science Publishing, 2014-07-01)
Previous studies indicate that the dark conductivity in amorphous and microcrystalline silicon may increase or decrease with exposure to deionized water (DIW) or pure oxygen at 80 degrees C but always decreases with light exposure. While the light-induced effect is linked to paramagnetic dangling bonds (D degrees), the origin of metastability in microcrystalline silicon remains unclear. In this study, we use steady-state photoconductivity (SSPC), dual-beam photoconductivity (DBP), and electron spin resonanc...
Citation Formats
E. Yüce, “Nonlinear frequency conversion of light inside a microcavity,” TURKISH JOURNAL OF PHYSICS, pp. 221–227, 2019, Accessed: 00, 2020. [Online]. Available: