Investigation of ring resonators in photonic crystal circuits

Kumar, Vikas; Srinivas, T.; Selvarajan, A.

doi:10.1016/j.photonics.2004.11.001

Cited by 111 publications

(28 citation statements)

References 9 publications

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“…In comparison with the nano-ring resonators of square lattice, the bending angle of hexagonal nano-ring resonator is not as sharp as the square ring. The effect of counter-propagating mode [29] is significantly suppressed. Suspended InGaAsP membrane based microcavity of hexagonal lattice has been demonstrated as a refractive index sensor with quality factor as high as 6400 [30], while 2-D PCs resonator made of silicon based nano-rods of hexagonal lattice has been reported as a channel drop filter [31].…”

Section: Resonator Configuration and Optimizationmentioning

confidence: 99%

Computational Study of Photonic Crystals Nano-Ring Resonator for Biochemical Sensing

2010

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Abstract-We investigated the characteristics of photonic crystals (PCs) nano-ring resonators as biochemical sensors theoretically. The new nano-ring resonators were formed by removing holes of a hexagon from a two-dimensional (2-D) silicon PC slab in hexagonal lattice. Resonant peak with quality factor of about 3000 is reported. Biomolecules, e.g., DNAs, trapped in a hole functionalized with molecule probes made the wavelength shift of resonant peak derived in the output terminal. The sensitivity of various sensing holes along the nano-ring was characterized. This new PC nano-ring resonator demonstrated promising features as a biochemical sensor.

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Section: Resonator Configuration and Optimizationmentioning

confidence: 99%

Computational Study of Photonic Crystals Nano-Ring Resonator for Biochemical Sensing

2010

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“…In the corners of the PCRR there are four extra rods shifted toward corner of 0.707a with the same refractive index and radius. The rods are needed to omit the back scattering at the corner [13,14] . In order to confirm the switching property shown in Fig.…”

Section: Structure Designmentioning

confidence: 99%

Design of Optical Nor Logic Gates Using Two Dimension Photonic Crystals.

Lin¹

2013

AJMP

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Abstract:In this paper, a novel all-optical NOR logic gate based on two dimension (2-D) photonic crystals (PC) is designed and simulated by a cascade of two all-optical switches. The new all-optical switch is composed of a nonlinear photonic crystal ring resonator (PCRR) and T-type waveguide. The PC structure has a square lattice of silicon rod with refractive index of 3.39 in air. The bandgap of this structure is derived by the plane wave expansion (PWE) method, which is from a/λ= 0.32 to a/λ= 0.44. In this structure to work at the wavelength of 1550 nm, the lattice constant 'a' should be 630 nm; the total size of the proposed optical NOR gate is only 18 µm × 11 µm. The simulation results using two dimensional finite difference time domain (FDTD) method indicated that the proposed optical NOR logic gate is a potential candidature for ultrafast optical digital circuits.

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“…This can offer us the design trade-offs and guidelines before the real structure design based on a completely 3D FDTD technique, which is typically computational time and memory conswning, In this investigation, the ratio of the rod radius r to the lattice constant Q, is 0.185. The photonic bandgap and the dispersion curve for the guided defect mode in the single line-defect can cause spurious dips in the transmission spectrum [17]. We put in these s-rods to improve the spectral selectivity and give a near-ideal drop efficiency.…”

Section: Single Ring Photonic Crystal Ring Resonatorsmentioning

confidence: 99%

“…Later, the spectral characteristics of the waveguide-coupled rectangular ring resonators in photonic crystals were investigated by Kumar et al [17], where a large single quasi-rectangular ring was introduced as the frequency selective dropping elements.…”

Section: Introductionmentioning

confidence: 99%

Optical add-drop filters based on photonic crystal ring resonators

2007

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. (From -To) REPORT DATE (DD-MM-YYYY) 19-02-2007 REPORT TYPE Journal Article DATES COVERED PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)AFRL/RYHC, 80 Scott Drive, Hanscom AFB, MA 01731 *Department of Electrical Engineering, NanoFAB Ctr, University of TX at Arlington, Arlington, TX 76019 PERFORMING ORGANIZATION REPORT SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Electromagnetics SPONSOR/MONITOR'S ACRONYM(S) AFRL-RY-HS SPONSOR/MONITOR'S REPORT NUMBER(S) AFRL-RY-HS-TP-2008-0012 DISTRIBUTION / AVAILABILITY STATEMENT ABSTRACTWe present here an optical add-drop filter (ADF) design based on ultra-compact photonic crystal ring resonators (PCRRs). The normalized transmission spectra for single-ring and dual-ring configurations have been investigated by using the two-dimensional finite-difference time-domain (FDTD) technique in a square lattice dielectric-rod photoniccrystal structure. With the introduction of four scatterers at the corners of quasisquare-ring PCRR, high wavelength selectivity and close to 100% drop efficiency can be obtained. Both backward-and forward-dropping were achieved by controlling the coupling efficiency between two PCRR rings for resonant modes with different symmetry. The resonantmode quality factor Q and the wavelength tunability were also analyzed, opening opportunities for PCRRs as ultracompact filters, optical add-drop multiplexers, electrooptical N x N switches and electrooptical modulators. SUBJECT TERMSOptical devices, photonic integrated circuits, integrated optics materials, waveguides, couplers, switches, multiplexers Abstract: We present here an optical add-drop filter (ADF) design based on ultra-compact photonic crystal ring resonators (PCRRs). The normalized transmission spectra for single-ring and dual-ring configurations have been investigated by using the two-dimensional finite-difference time-domain (FDTD) technique in a square lattice dielectric-rod photonic-crystal structure. With the introduction of four scatterers at the comers of quasisquare-ring PCRR, high wavelength selectivity and close to 100% drop efficiency can be obtained. Both backward-and forward-drop...

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Investigation of ring resonators in photonic crystal circuits

Cited by 111 publications

References 9 publications

Computational Study of Photonic Crystals Nano-Ring Resonator for Biochemical Sensing

Computational Study of Photonic Crystals Nano-Ring Resonator for Biochemical Sensing

Design of Optical Nor Logic Gates Using Two Dimension Photonic Crystals.

Optical add-drop filters based on photonic crystal ring resonators

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