Abstract:
Disclosed are a manufacturing method for a compound semiconductor substrate using a silicon-based lattice mismatching elimination layer, which includes a step of forming an AlAsSb layer on a silicon substrate; a step of forming an AlAs on the AlAsSb layer; and a step of forming a GaAs layer on the AlAs, and a compound semiconductor substrate manufactured by the same.
Abstract:
본 발명은 InGaAs/GaAs 양자점 에너지 밴드갭을 조정하는 방법에 관한 것으로서, InGaAs/GaAs 양자점 기판을 성장하는 단계와, InGaAs/GaAs 양자점 기판에 2중 유전체 덮개층을 성장하는 단계와, 2중 유전체 덮개층이 성장된 InGaAs/GaAs 양자점 기판을 열처리하는 단계를 포함하는 InGaAs/GaAs 양자점 에너지 밴드갭 조정 방법을 제공한다. InGaAs/GaAs 양자점 기판에 유전체 덮개층으로 SiN x 와 SiO 2 를 성장하고, 700℃에서 1 내지 4분간 열처리한 결과, InGaAs/GaAs 양자점 기판에 국부적으로 다른 에너지 밴드갭이 형성되었고 공정 조건에 의존하여 에너지 밴드갭의 이동량이 변화하는 것을 관찰하며, 이와 함께 반치폭 값의 감소 현상과 스펙트럼 강도의 증가 현상을 관찰한다.
Abstract:
본 발명은 스트레인 보상 다층양자우물을 이용하는 단일모드형 레이저 다이오드 및 그 제조 방법에 관한 것으로서, 다수의 압축 스트레인 우물층과 다수의 긴장 스트레인 장벽층으로 이루어진 스트레인 보상 다층양자우물을 갖는 에피 구조를 이용함으로써, 다층양자우물에서의 오제 재결합 발생 확률을 감소시키고, 다층양자우물의 온도 안정성을 더욱 향상시켜 양자 효율을 증가시키며, 최대 광출력 및 단일모드 광출력을 증가시킬 수 있는 단일모드형 레이저 다이오드 및 그 제조 방법을 제공한다.
Abstract:
본 발명은 ALE(Atomic Layer Epitaxy)를 사용하여 반도체 양자점들(semiconductor quantum dots)을 성장시키기 위한 방법에 관한 것이다. 이 방법은 a) 기판을 마련하는 단계와, b) 반도체 양자점을 성장시키기 위한 물질들을 적어도 하나의 시간 간격을 갖는 사전설정된 시퀀스(sequence)에 따라 상기 기판 상에 주입하는 단계와, c) 단계 b)를 사전설정된 횟수만큼 반복하여 반도체 양자점을 성장시키는 단계를 포함한다. 여기서, 단계 b)는 ALE(Atomin Layer Epitaxy) 법을 사용하여 수행되며, 주입 물질들은 금속 원자와 비금속 원자를 포함한다.
Abstract:
PURPOSE: A super luminescent diode using a quantum dot as an active layer is provided to emit light with a region of a new wavelength by simultaneously satisfying a broad wavelength bandwidth of an LED(light emitting diode) and a high optical output of a laser diode. CONSTITUTION: A substrate(21) is prepared. The first cladding layer(22) is formed on the substrate to restrict emitted light. The first super lattice layer(23) is formed on the first cladding layer to control the arrangement of quantum dots. An active layer(24) of a quantum dot is formed on the first super lattice layer to emit the light with a predetermined wavelength. The second super lattice layer(25) is formed on the active layer to control the arrangement of the quantum dots. The second cladding layer(26) is formed on the second super lattice layer to restrict the light emitted from the active layer. An ohmic layer(27) is formed on the second cladding layer to control an ohmic contact.
Abstract:
PURPOSE: A method is provided which increase light output of a laser diode using a heavily doped p-InP insertion layer in an InP-based laser diode technique. CONSTITUTION: According to the method for forming an InGaAsP/InGaAs laser diode structure based on InP, a heavily doped p-InP layer is inserted, and the above p-InP layer is adjacent to a quantum well. The heavily doped p-InP layer is used in a ridge type laser diode, a large area laser diode, a taper type laser diode and a superluminescent laser diode. While inserting the heavily doped p-InP layer, Be and Zn are used as a p-doping impurity.
Abstract:
PURPOSE: A method for controlling an energy band gap of InGaAs/GaAs quantum dot by combination of a dielectric capping layer in a quantum dot disorder method is provided to form different band gap regions on the same InGaAs/GaAs quantum dot substrate by coating a dielectric capping layer on a quantum dot structure and performing a thermal process. CONSTITUTION: A method for controlling an energy band gap of InGaAs/GaAs quantum dot by using a dielectric capping layer includes a dielectric combination formation process and an energy band gap formation process. The dielectric combination formation process is to form a dielectric combination on a quantum dot substrate by using SiNx and SiO2 as the dielectric capping layer. The quantum dot substrate having a different energy band gap is formed by performing a thermal process for the quantum dot substrate.
Abstract:
PURPOSE: A high speed optical wavelength converting apparatus for detecting electrooptic synchronous signal at the same time is provided to realize a high speed optical wavelength convertor without an optical pump and to realize a clock generator generating optical pulse trains with synchronized to the phase of input signal train. CONSTITUTION: The apparatus includes a mode locking laser(100) and an attenuator(120) for attenuating an optical output of an optical fiber. The first and second polarization controllers(140,280) are provided for maximizing four-wave mixing phenomenon because the four-wave mixing phenomenon is dependent upon polarization. A 3-dB optical coupler(160) is provided for dividing optical intensity into fifty to fifty. An optical isolator(180) transmits an optical wavelength of the optical fiber. A semiconductor optical amplifier(200) is operated as a laser gainer and a wavelength converter. The apparatus includes a delay line(220), an output variable optical fiber coupler(240) for varying the output intensity of the optical fiber, a band pass filter(260) for varying and filtering the optical wavelength, the first and second band pass filters(300,340), and an oscilloscope(340).