We report on the theoretical and experimental investigations of optical microcavities consisting in the plane-plane arrangement of a broadband high-reflectivity mirror and a suspended one-dimensional grating mirror possessing a high-quality factor Fano resonance. By varying the length of these cavities from the millimeter to the few-micron range, we observe at short lengths the reduction of the spectral linewidth predicted to occur for such a Fano cavity as compared to a conventional broadband mirror cavity with the same length and internal losses. Such narrow linewidth and small modevolume microcavities with high-mechanical quality ultrathin mirrors will be attractive for a wide range of applications within optomechanics and sensing.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.521329 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Coexistence of the Radial-Guided Mode and WGM in Azimuthal-Grating-Integrated Microring Lasers.
ACS Photonics
December 2024
Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University, 744 Motooka Nishi-ku, Fukuoka, 819-0395, Japan.
Whispering-gallery mode (WGM) resonators, renowned for their high Q-factors and narrow line widths, are widely utilized in integrated photonics. Integrating diffraction gratings onto WGM cavities has gained significant attention because these gratings function as azimuthal refractive index modulators, enabling single-mode WGM emissions and supporting beams with orbital angular momentum (OAM). The introduction of curved grating structures facilitates guided mode resonances by coupling high-order diffracted waves with leaking modes from the waveguide.
View Article and Find Full Text PDFExcitonic-Vibrational Interaction at 2D Material/Organic Molecule Interfaces Studied by Time-Resolved Sum Frequency Generation.
Nanomaterials (Basel)
November 2024
Physics Department, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures [Ministry of Education (MOE)], Fudan University, Shanghai 200433, China.
The hybrid heterostructures formed between two-dimensional (2D) materials and organic molecules have gained great interest for their potential applications in advanced photonic and optoelectronic devices, such as solar cells and biosensors. Characterizing the interfacial structure and dynamic properties at the molecular level is essential for realizing such applications. Here, we report a time-resolved sum-frequency generation (TR-SFG) approach to investigate the hybrid structure of polymethyl methacrylate (PMMA) molecules and 2D transition metal dichalcogenides (TMDCs).
View Article and Find Full Text PDFArticle Synopsis
- Control of transverse modes in VCSELs is crucial, and this study introduces a double heterostructure high-contrast grating (HCG) as an effective top mirror for improved control.
- The double heterostructure HCG-VCSEL is shown to suppress higher-order transverse modes, leading to better performance compared to conventional HCG-VCSELs.
- Experimental results confirm that this new design results in a reduced spectral width and a red-shifted fundamental mode, aligning well with theoretical predictions.
Ultrahigh-reflectivity chiral mirrors based on the metasurface of the quarter-waveplate.
Heliyon
November 2024
Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
A study is conducted on a GaAs-based high-contrast subwavelength chiral metasurface (HCCM) designed for 1064 nm. The metasurface integrates a high-contrast subwavelength grating (HCG) for TM mode modulation, a SiO support layer, and a compact quarter-waveplate (QWP) to convert linearly polarized light to circularly polarized light. The HCG achieves ultra-high reflectivity at 1064 nm, attributed to the large refractive index contrast between the Si grating and SiO2 layer.
View Article and Find Full Text PDFIn this study, we demonstrated a few-cycle pulse generation system delivering an 8-fs and 13-nJ pulse. The oscillator of this system is a mode-locked fiber laser based on a nonlinear amplifying loop mirror (NALM), which is injected into the gain management nonlinear (GMN) amplifier after pre-chirp management by a chirped fiber Bragg grating (CFBG) and a passive fiber. Subsequently, a hollow-core photonic bandgap (HC-PBG) fiber is employed to compensate for the dispersion, achieving a pulse duration of 49.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!