نتایج جستجو برای: multiple mode resonator

تعداد نتایج: 974586  

2016
Shobhit K. Patel Christos Argyropoulos Yogeshwar P. Kosta

We present microstrip patch antenna loaded with multiple split ring resonator substrate and superstrate. We analyze how the loading of split ring resonator superstrate and substrate can improve the bandwidth compared to the simple microstrip patch antenna and microstrip patch antenna loaded with split ring resonator superstrate. Another important observation is made for multiple split ring reso...

Journal: :Optics express 2015
Alireza Taghizadeh Jesper Mørk Il-Sug Chung

We numerically investigate the properties of a hybrid grating structure acting as a resonator with ultrahigh quality factor. This reveals that the physical mechanism responsible for the resonance is quite different from the conventional guided mode resonance (GMR). The hybrid grating consists of a subwavelength grating layer and an un-patterned high-refractive-index cap layer, being surrounded ...

Here, we propose an add-drop and a channel drop filter based on two-dimensional photonic crystal all circular ring resonators. These structures are made of a square lattice of silicon rods with the refractive index n1=3.464 surrounded by air (with refractive index n2=1). The broadest photonic band gap occurs at the filling ratio of r/a = 0.17. Two linear defect W1 waveguides couple to the ring....

2003
ATSUSHI SANADA TATSUO ITOH

A novel resonator using a composite right/left-handed (CRLH) transmission line (TL) is presented and its extraordinary resonant characteristics with an infinite-wavelength wave are discussed. The resonance corresponds to the zeroth-order on the analogy of the conventional mode numbering. The zeroth-order resonant characteristics and loss mechanism are fully described by the circuit theory and i...

2017
Wei Wei Jinpeng Nong Xiao Jiang Na Chen Suqin Luo Linlong Tang Kazunori Hoshino

Infrared absorption spectroscopy remains a challenge due to the weak light-matter interaction between micron-wavelengthed infrared light and nano-sized molecules. A highly doped semiconductor supports intrinsic plasmon modes at infrared frequencies, and is compatible with the current epitaxial growth processing, which makes it promising for various applications. Here, we propose an all-semicond...

Journal: :Physical review letters 2005
K C Schwab M P Blencowe M L Roukes A N Cleland S M Girvin G J Milburn K L Ekinci

In a recent Letter, Gaidarzhy et al. [1] claim to have observed evidence for ''quantized displacements'' of a high-order mode of a nanomechanical oscillator. We contend that the methods employed by the authors are unsuitable in principle to observe such states for any harmonic mode. (1) According to standard quantum mechanics, continuous measurement of the energy quanta in any resonator mode re...

Journal: :Optics letters 2014
Hailong Zhou Jianji Dong Lei Shi Dexiu Huang Xinliang Zhang

We put forward a hybrid coding method of multiple orbital angular momentum (OAM) states based on the inherent orthogonality. Theoretical analysis shows this new coding method can tremendously improve the coding efficiency compared to the conventional way, and the OAM mode can be extended to all the transverse orthographic modes such as Bessel beams or Laguerre-Gauss modes. We also present a typ...

Journal: :Optics letters 2003
D N Papadopoulos S Forget M Delaigue F Druon F Balembois P Georges

We demonstrate the operation of an ultralow-repetition-rate, high-peak-power, picosecond diode-pumped Nd:YVO4 passively mode-locked laser oscillator. Repetition rates lower than 1 MHz were achieved with the use of a new design for a multiple-pass cavity and a semiconductor saturable absorber. Long-term stable operation at 1.2 MHz with a pulse duration of 16.3 ps and an average output power of 4...

Journal: :The Journal of the Acoustical Society of America 2017
Craig N Dolder Preston S Wilson

Resonator techniques can be successfully used to extract effective medium properties from dispersive materials. However, in some cases the dispersion can cause modes to repeat. If repeated modes are not taken into account, the useful range of the resonator technique is limited. A resonance tube containing tethered balloons is used to create a dispersive effective medium. Resonator measurements ...

2002
Se-Heon Kim Han-Youl Ryu Hong-Gyu Park Guk-Hyun Kim Yong-Seok Choi Yong-Hee Lee Jeong-Soo Kim

Hexagonal ring-type resonators defined by two-dimensional photonic crystal waveguides are proposed and demonstrated. Lasing actions are observed from the photonic crystal ring resonator patterned on a free-standing slab with InGaAsP active layers emitting near 1.55 mm. For a ring resonator with 8-mm diameter, the threshold peak pump power is ;3 mW. The quality factor of the ring resonator mode ...

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